diff --git a/backend/api/v1/documents/fields.py b/backend/api/v1/documents/fields.py
index 11d1fcdd..8dc8570e 100644
--- a/backend/api/v1/documents/fields.py
+++ b/backend/api/v1/documents/fields.py
@@ -74,23 +74,6 @@ class FilerFileField(serializers.Field):
         if not isinstance(data, UploadedFile):
             raise serializers.ValidationError("Ожидается файл для загрузки.")
 
-        # Проверка размера файла
-        from django.conf import settings
-        from django.template.defaultfilters import filesizeformat
-
-        limit = getattr(settings, "DATA_UPLOAD_MAX_MEMORY_SIZE", None)
-        if limit:
-            size = getattr(data, "size", None)
-            if size is None:
-                raise serializers.ValidationError(
-                    "Невозможно определить размер файла"
-                )
-            if int(size) > int(limit):
-                human = filesizeformat(limit)
-                raise serializers.ValidationError(
-                    f"Файл слишком большой: > {human}."
-                )
-
         # Получаем пользователя из контекста
         request = self.context.get("request")
         owner = getattr(request, "user", None) if request else None
diff --git a/backend/api/v1/documents/permissions.py b/backend/api/v1/documents/permissions.py
index 0b44482e..17d3326a 100644
--- a/backend/api/v1/documents/permissions.py
+++ b/backend/api/v1/documents/permissions.py
@@ -62,6 +62,8 @@ class DocumentReadOrModelPerms(AdminOrActionOrModelPerms):
             "acknowledge",
             "download",
             "archive",
+            "comments",
+            "document_comment",
         ):
             return bool(request.user and request.user.is_authenticated)
 
@@ -108,6 +110,9 @@ class DocumentReadOrModelPerms(AdminOrActionOrModelPerms):
         if action in ("add_related", "remove_related"):
             return user.has_perm("documents.change_document", obj)
 
+        if action in ("comments", "document_comment"):
+            return _user_has_document_access(user, obj)
+
         # PUT/PATCH → проверяем django-rules change_document
         if request.method in ("PUT", "PATCH"):
             return user.has_perm("documents.change_document", obj)
@@ -122,6 +127,8 @@ class DocumentReadOrModelPerms(AdminOrActionOrModelPerms):
             "acknowledge",
             "download",
             "archive",
+            "comments",
+            "document_comment",
         ):
             return _user_has_document_access(user, obj)
 
diff --git a/backend/api/v1/documents/serializers.py b/backend/api/v1/documents/serializers.py
index ab7b9c8c..6b86b9d1 100644
--- a/backend/api/v1/documents/serializers.py
+++ b/backend/api/v1/documents/serializers.py
@@ -8,6 +8,7 @@ from typing import Any, Dict, Sequence, Iterable
 from drf_spectacular.utils import extend_schema_field
 from django.http import QueryDict
 from django.contrib.auth import get_user_model
+from django.db.models import Q
 from django.utils.text import slugify
 from documents.models import Document, DocumentAcknowledgement
 from rest_framework import serializers
@@ -281,6 +282,12 @@ class DocumentReadSerializer(serializers.ModelSerializer):
     modified_by = EmployeeBriefSerializer(read_only=True)
     recipients = EmployeeBriefSerializer(many=True, read_only=True)
     departments = DepartmentBriefSerializer(many=True, read_only=True)
+    acknowledgement_recipients = EmployeeBriefSerializer(
+        many=True, read_only=True
+    )
+    acknowledgement_departments = DepartmentBriefSerializer(
+        many=True, read_only=True
+    )
     folder = FolderBriefSerializer(read_only=True)
     folder_path = serializers.CharField(read_only=True)
     tags = DocumentTagSerializer(many=True, read_only=True)
@@ -293,6 +300,10 @@ class DocumentReadSerializer(serializers.ModelSerializer):
         source="file.size", read_only=True, allow_null=True
     )
     is_acknowledged = serializers.SerializerMethodField()
+    acknowledgement_required_for_user = serializers.SerializerMethodField()
+    acknowledged_count = serializers.SerializerMethodField()
+    acknowledgement_total = serializers.SerializerMethodField()
+    comments_count = serializers.SerializerMethodField()
     linked_tasks = serializers.SerializerMethodField()
 
     class Meta:
@@ -314,8 +325,15 @@ class DocumentReadSerializer(serializers.ModelSerializer):
             "sent_to_all",
             "is_regulation",
             "acknowledgement_required",  # Требуется ли ознакомление
+            "acknowledgement_for_all",
+            "acknowledgement_required_for_user",
+            "acknowledged_count",
+            "acknowledgement_total",
+            "comments_count",
             "departments",
             "recipients",
+            "acknowledgement_departments",
+            "acknowledgement_recipients",
             "file_url",
             "file_name",
             "file_size",
@@ -343,6 +361,51 @@ class DocumentReadSerializer(serializers.ModelSerializer):
             document=obj, user=request.user
         ).exists()
 
+    def get_acknowledgement_required_for_user(self, obj: Document) -> bool:
+        """Нужно ли текущему сотруднику подтверждать ознакомление."""
+        request = self.context.get("request")
+        if not request or not request.user.is_authenticated:
+            return False
+
+        audience_ids = getattr(obj, "_acknowledgement_user_ids", None)
+        if audience_ids is not None:
+            return request.user.pk in audience_ids
+
+        from documents.audience import user_requires_document_acknowledgement
+
+        return user_requires_document_acknowledgement(obj, request.user)
+
+    def get_acknowledged_count(self, obj: Document) -> int:
+        """Количество сотрудников из аудитории, уже ознакомившихся."""
+        attached = getattr(obj, "_acknowledged_count", None)
+        if attached is not None:
+            return int(attached)
+
+        from documents.audience import document_acknowledgement_audience
+
+        audience = document_acknowledgement_audience(obj)
+        return obj.acknowledgements.filter(user__in=audience).count()
+
+    def get_acknowledgement_total(self, obj: Document) -> int:
+        """Размер аудитории обязательного ознакомления."""
+        attached = getattr(obj, "_acknowledgement_total", None)
+        if attached is not None:
+            return int(attached)
+
+        from documents.audience import document_acknowledgement_audience
+
+        return document_acknowledgement_audience(obj).count()
+
+    def get_comments_count(self, obj: Document) -> int:
+        """Количество неудалённых комментариев документа."""
+        attached = getattr(obj, "_comments_count", None)
+        if attached is not None:
+            return int(attached)
+
+        from communications.comments_helpers import get_comment_count
+
+        return get_comment_count(obj)
+
     @extend_schema_field(serializers.ListField(child=serializers.DictField()))
     def get_linked_tasks(self, obj: Document) -> list[dict]:
         prefetched = getattr(obj, "_linked_task_payloads", None)
@@ -432,6 +495,18 @@ class DocumentWriteSerializer(serializers.ModelSerializer):
         help_text="Список ID отделов-получателей.",
     )
 
+    acknowledgement_recipient_ids = RecipientIDsField(
+        write_only=True,
+        required=False,
+        help_text="Список ID сотрудников, обязанных ознакомиться.",
+    )
+
+    acknowledgement_department_ids = RecipientIDsField(
+        write_only=True,
+        required=False,
+        help_text="Список ID отделов, обязанных ознакомиться.",
+    )
+
     tag_ids = RecipientIDsField(
         write_only=True,
         required=False,
@@ -456,8 +531,11 @@ class DocumentWriteSerializer(serializers.ModelSerializer):
             "sent_to_all",
             "is_regulation",
             "acknowledgement_required",
+            "acknowledgement_for_all",
             "department_ids",
             "recipient_ids",
+            "acknowledgement_department_ids",
+            "acknowledgement_recipient_ids",
             "tag_ids",
         )
 
@@ -491,9 +569,27 @@ class DocumentWriteSerializer(serializers.ModelSerializer):
             elif self.instance is not None:
                 attrs.pop("title", None)
 
-        sent_to_all = attrs.get("sent_to_all", True)
-        recipient_ids = attrs.get("recipient_ids", [])
-        department_ids = attrs.get("department_ids", [])
+        instance = self.instance
+        sent_to_all = attrs.get(
+            "sent_to_all",
+            instance.sent_to_all if instance is not None else True,
+        )
+        recipient_ids = set(
+            attrs.get(
+                "recipient_ids",
+                instance.recipients.values_list("pk", flat=True)
+                if instance is not None
+                else [],
+            )
+        )
+        department_ids = set(
+            attrs.get(
+                "department_ids",
+                instance.departments.values_list("pk", flat=True)
+                if instance is not None
+                else [],
+            )
+        )
 
         if sent_to_all is False and not recipient_ids and not department_ids:
             raise serializers.ValidationError(
@@ -504,6 +600,77 @@ class DocumentWriteSerializer(serializers.ModelSerializer):
                     )
                 }
             )
+
+        acknowledgement_required = attrs.get(
+            "acknowledgement_required",
+            instance.acknowledgement_required if instance is not None else True,
+        )
+        acknowledgement_for_all = attrs.get(
+            "acknowledgement_for_all",
+            instance.acknowledgement_for_all if instance is not None else True,
+        )
+        acknowledgement_recipient_ids = set(
+            attrs.get(
+                "acknowledgement_recipient_ids",
+                instance.acknowledgement_recipients.values_list("pk", flat=True)
+                if instance is not None
+                else [],
+            )
+        )
+        acknowledgement_department_ids = set(
+            attrs.get(
+                "acknowledgement_department_ids",
+                instance.acknowledgement_departments.values_list("pk", flat=True)
+                if instance is not None
+                else [],
+            )
+        )
+
+        if (
+            acknowledgement_required
+            and not acknowledgement_for_all
+            and not acknowledgement_recipient_ids
+            and not acknowledgement_department_ids
+        ):
+            raise serializers.ValidationError(
+                {
+                    "acknowledgement_recipient_ids": (
+                        "Выберите сотрудников, отделы или включите "
+                        "ознакомление для всех с доступом."
+                    )
+                }
+            )
+
+        if acknowledgement_required and not acknowledgement_for_all and not sent_to_all:
+            invalid_departments = acknowledgement_department_ids - department_ids
+            if invalid_departments:
+                raise serializers.ValidationError(
+                    {
+                        "acknowledgement_department_ids": (
+                            "Отдел для ознакомления должен иметь доступ к документу."
+                        )
+                    }
+                )
+
+            allowed_recipients = User.objects.filter(is_active=True).filter(
+                Q(pk__in=recipient_ids)
+                | Q(
+                    departments_links__department_id__in=department_ids,
+                    departments_links__is_active=True,
+                )
+            ).values_list("pk", flat=True)
+            invalid_recipients = acknowledgement_recipient_ids - set(
+                allowed_recipients
+            )
+            if invalid_recipients:
+                raise serializers.ValidationError(
+                    {
+                        "acknowledgement_recipient_ids": (
+                            "Сотрудник для ознакомления должен иметь доступ "
+                            "к документу."
+                        )
+                    }
+                )
         return attrs
 
     def _set_departments(
@@ -574,6 +741,22 @@ class DocumentWriteSerializer(serializers.ModelSerializer):
         logger.info(f"[serializers] Set {count} recipients for doc={doc.id}")
         return count
 
+    def _set_acknowledgement_departments(
+        self, doc: Document, department_ids: Sequence[int]
+    ) -> int:
+        from employees.models import Department
+
+        departments = Department.objects.filter(id__in=set(department_ids))
+        doc.acknowledgement_departments.set(departments)
+        return departments.count()
+
+    def _set_acknowledgement_recipients(
+        self, doc: Document, recipient_ids: Sequence[int]
+    ) -> int:
+        users = User.objects.filter(is_active=True, id__in=set(recipient_ids))
+        doc.acknowledgement_recipients.set(users)
+        return users.count()
+
     def _set_tags(self, doc: Document, tag_ids: Sequence[int]) -> int:
         """Привязывает теги по списку ID.
 
@@ -618,6 +801,12 @@ class DocumentWriteSerializer(serializers.ModelSerializer):
         """
         recipient_ids = validated_data.pop("recipient_ids", [])
         department_ids = validated_data.pop("department_ids", [])
+        acknowledgement_recipient_ids = validated_data.pop(
+            "acknowledgement_recipient_ids", []
+        )
+        acknowledgement_department_ids = validated_data.pop(
+            "acknowledgement_department_ids", []
+        )
         tag_ids = validated_data.pop("tag_ids", [])
         request = self.context.get("request")
         uploader = getattr(request, "user", None)
@@ -632,17 +821,29 @@ class DocumentWriteSerializer(serializers.ModelSerializer):
 
         # Создаём документ - сигналы из notification_signals.py сработают
         # автоматически
-        doc = Document.objects.create(  # type: ignore[arg-type]
+        doc = Document(  # type: ignore[arg-type]
             uploaded_by=uploader,
             **validated_data,
         )
+        doc._suppress_document_notifications = True
+        doc.save()
         logger.info(
             f"[serializers] Document created id={doc.id} "
             f"sent_to_all={doc.sent_to_all}"
         )
 
-        # Для индивидуальной рассылки устанавливаем получателей
-        # Это вызовет m2m_changed сигнал
+        if (
+            doc.acknowledgement_required
+            and not doc.acknowledgement_for_all
+        ):
+            self._set_acknowledgement_departments(
+                doc, acknowledgement_department_ids
+            )
+            self._set_acknowledgement_recipients(
+                doc, acknowledgement_recipient_ids
+            )
+
+        # Для индивидуальной доступности устанавливаем получателей.
         if validated_data.get("sent_to_all") is False:
             if department_ids:
                 logger.info(
@@ -661,6 +862,11 @@ class DocumentWriteSerializer(serializers.ModelSerializer):
             logger.info(f"[serializers] Setting tags for doc={doc.id}")
             self._set_tags(doc, tag_ids)
 
+        doc._suppress_document_notifications = False
+        from documents.notifications.handlers import notify_document_audience
+
+        notify_document_audience(doc)
+
         logger.info(f"[serializers] Document creation complete id={doc.id}")
         return doc
 
@@ -678,6 +884,12 @@ class DocumentWriteSerializer(serializers.ModelSerializer):
         """
         recipient_ids = validated_data.pop("recipient_ids", None)
         department_ids = validated_data.pop("department_ids", None)
+        acknowledgement_recipient_ids = validated_data.pop(
+            "acknowledgement_recipient_ids", None
+        )
+        acknowledgement_department_ids = validated_data.pop(
+            "acknowledgement_department_ids", None
+        )
         tag_ids = validated_data.pop("tag_ids", None)
 
         for f in (
@@ -687,6 +899,7 @@ class DocumentWriteSerializer(serializers.ModelSerializer):
             "sent_to_all",
             "is_regulation",
             "acknowledgement_required",
+            "acknowledgement_for_all",
             "file",
             "folder",
         ):
@@ -694,6 +907,19 @@ class DocumentWriteSerializer(serializers.ModelSerializer):
                 setattr(instance, f, validated_data[f])
         instance.save()
 
+        if not instance.acknowledgement_required or instance.acknowledgement_for_all:
+            instance.acknowledgement_recipients.clear()
+            instance.acknowledgement_departments.clear()
+        else:
+            if acknowledgement_department_ids is not None:
+                self._set_acknowledgement_departments(
+                    instance, acknowledgement_department_ids
+                )
+            if acknowledgement_recipient_ids is not None:
+                self._set_acknowledgement_recipients(
+                    instance, acknowledgement_recipient_ids
+                )
+
         # очищаем получателей и отделы при sent_to_all=true
         if "sent_to_all" in validated_data and instance.sent_to_all:
             instance.recipients.clear()
diff --git a/backend/api/v1/documents/views.py b/backend/api/v1/documents/views.py
index 40671d14..e37bafa1 100644
--- a/backend/api/v1/documents/views.py
+++ b/backend/api/v1/documents/views.py
@@ -15,6 +15,10 @@ from documents.models import (
     DocumentAcknowledgement,
     DocumentTag,
 )
+from documents.audience import (
+    document_acknowledgement_audience,
+    user_requires_document_acknowledgement,
+)
 from easy_thumbnails.files import get_thumbnailer
 from filer.models import Folder
 import reversion
@@ -51,7 +55,12 @@ class DocumentViewSet(ModelViewSet):
     queryset: QuerySet[Document] = (
         Document.objects.all()
         .select_related("uploaded_by")
-        .prefetch_related("recipients")
+        .prefetch_related(
+            "recipients",
+            "departments",
+            "acknowledgement_recipients",
+            "acknowledgement_departments",
+        )
     )
     permission_classes = [DocumentReadOrModelPerms]
     parser_classes = (MultiPartParser, FormParser, JSONParser)
@@ -202,20 +211,123 @@ class DocumentViewSet(ModelViewSet):
         for document in documents:
             document._linked_task_payloads = mapping.get(document.id, [])
 
+    def _attach_document_metrics(self, documents: list[Document]) -> None:
+        """Пакетно рассчитывает комментарии и состояние ознакомления."""
+        if not documents:
+            return
+
+        from communications.models import Message
+        from employees.models import EmployeeDepartment
+
+        document_ids = [document.id for document in documents]
+        active_user_ids = set(
+            User.objects.filter(is_active=True).values_list("id", flat=True)
+        )
+        department_ids = {
+            department.id
+            for document in documents
+            for department in (
+                list(document.departments.all())
+                + list(document.acknowledgement_departments.all())
+            )
+        }
+        employees_by_department: dict[int, set[int]] = {
+            department_id: set() for department_id in department_ids
+        }
+        if department_ids:
+            for department_id, employee_id in EmployeeDepartment.objects.filter(
+                department_id__in=department_ids,
+                is_active=True,
+                employee__is_active=True,
+            ).values_list("department_id", "employee_id"):
+                employees_by_department.setdefault(department_id, set()).add(
+                    employee_id
+                )
+
+        acknowledged_by_document: dict[int, set[int]] = {
+            document_id: set() for document_id in document_ids
+        }
+        for document_id, user_id in DocumentAcknowledgement.objects.filter(
+            document_id__in=document_ids,
+            user__is_active=True,
+        ).values_list("document_id", "user_id"):
+            acknowledged_by_document.setdefault(document_id, set()).add(user_id)
+
+        document_content_type = ContentType.objects.get_for_model(Document)
+        comments_by_document = {
+            row["chat__context_object_id"]: row["total"]
+            for row in Message.objects.filter(
+                chat__type="comments",
+                chat__context_content_type=document_content_type,
+                chat__context_object_id__in=document_ids,
+                is_deleted=False,
+            )
+            .values("chat__context_object_id")
+            .annotate(total=Count("id"))
+        }
+
+        for document in documents:
+            if document.sent_to_all:
+                access_ids = active_user_ids
+            else:
+                access_ids = {
+                    recipient.id
+                    for recipient in document.recipients.all()
+                    if recipient.id in active_user_ids
+                }
+                for department in document.departments.all():
+                    access_ids.update(
+                        employees_by_department.get(department.id, set())
+                    )
+
+            if not document.acknowledgement_required:
+                acknowledgement_ids: set[int] = set()
+            elif document.acknowledgement_for_all:
+                acknowledgement_ids = set(access_ids)
+            else:
+                acknowledgement_ids = {
+                    recipient.id
+                    for recipient in document.acknowledgement_recipients.all()
+                    if recipient.id in active_user_ids
+                }
+                for department in document.acknowledgement_departments.all():
+                    acknowledgement_ids.update(
+                        employees_by_department.get(department.id, set())
+                    )
+                acknowledgement_ids.intersection_update(access_ids)
+
+            document._acknowledgement_user_ids = acknowledgement_ids
+            document._acknowledgement_total = len(acknowledgement_ids)
+            document._acknowledged_count = len(
+                acknowledgement_ids
+                & acknowledged_by_document.get(document.id, set())
+            )
+            document._comments_count = comments_by_document.get(document.id, 0)
+
     def list(self, request, *args, **kwargs):
         queryset = self.filter_queryset(self.get_queryset())
 
         page = self.paginate_queryset(queryset)
         if page is not None:
-            self._attach_linked_task_payloads(list(page))
-            serializer = self.get_serializer(page, many=True)
+            documents = list(page)
+            self._attach_linked_task_payloads(documents)
+            self._attach_document_metrics(documents)
+            serializer = self.get_serializer(documents, many=True)
             return self.get_paginated_response(serializer.data)
 
         documents = list(queryset)
         self._attach_linked_task_payloads(documents)
+        self._attach_document_metrics(documents)
         serializer = self.get_serializer(documents, many=True)
         return Response(serializer.data)
 
+    def retrieve(self, request, *args, **kwargs):
+        document = self.get_object()
+        self._attach_linked_task_payloads([document])
+        self._attach_document_metrics([document])
+        serializer = self.get_serializer(document)
+        return Response(serializer.data)
+
     @transaction.atomic
     def create(self, request, *args, **kwargs):
         """Создаёт документ и возвращает read-схему + recipient_count.
@@ -236,6 +348,7 @@ class DocumentViewSet(ModelViewSet):
 
         doc = serializer.save()
 
+        self._attach_document_metrics([doc])
         read = DocumentReadSerializer(doc, context={"request": request})
         data = dict(read.data)
 
@@ -263,6 +376,7 @@ class DocumentViewSet(ModelViewSet):
         serializer.is_valid(raise_exception=True)
         doc = serializer.save()
 
+        self._attach_document_metrics([doc])
         read = DocumentReadSerializer(doc, context={"request": request})
         return Response(read.data, status=status.HTTP_200_OK)
 
@@ -395,11 +509,166 @@ class DocumentViewSet(ModelViewSet):
                 },
                 status=status.HTTP_400_BAD_REQUEST,
             )
+        if not user_requires_document_acknowledgement(doc, request.user):
+            return Response(
+                {
+                    "detail": (
+                        "Для вас подтверждение ознакомления с этим "
+                        "документом не требуется."
+                    )
+                },
+                status=status.HTTP_400_BAD_REQUEST,
+            )
         obj, created = DocumentAcknowledgement.objects.get_or_create(
             document=doc, user=request.user
         )
         return Response({"ok": True, "already": not created})
 
+    def _document_comment_payload(self, document, message):
+        """Формат комментария документа для frontend."""
+        return {
+            "id": message.id,
+            "document": document.id,
+            "author": EmployeeBriefSerializer(
+                message.author,
+                context={"request": self.request},
+            ).data,
+            "text": message.content,
+            "parent": message.reply_to_id,
+            "created_at": message.created_at,
+            "updated_at": message.edited_at or message.created_at,
+            "is_edited": message.is_edited,
+            "replies_count": message.direct_replies.filter(
+                is_deleted=False
+            ).count(),
+            "can_edit": message.author_id == self.request.user.id,
+            "can_delete": bool(
+                message.author_id == self.request.user.id
+                or self.request.user.is_staff
+                or self.request.user.is_superuser
+            ),
+        }
+
+    @action(detail=True, methods=["get", "post"], url_path="comments")
+    def comments(self, request, pk=None):
+        """Получение и создание комментариев документа через Communications."""
+        from communications import comments_helpers
+        from communications.models import Message
+
+        document = self.get_object()
+        if request.method in ("GET", "HEAD"):
+            messages = comments_helpers.get_comments(document)
+            return Response(
+                [
+                    self._document_comment_payload(document, message)
+                    for message in messages
+                ]
+            )
+
+        text = str(request.data.get("text") or "").strip()
+        if not text:
+            return Response(
+                {"text": ["Это поле не может быть пустым."]},
+                status=status.HTTP_400_BAD_REQUEST,
+            )
+
+        reply_to = None
+        parent_id = request.data.get("parent_id") or request.data.get("parent")
+        if parent_id:
+            chat = comments_helpers.get_comments_chat_if_exists(document)
+            if chat is None:
+                return Response(
+                    {"parent_id": ["Родительский комментарий не найден."]},
+                    status=status.HTTP_400_BAD_REQUEST,
+                )
+            try:
+                reply_to = Message.objects.get(
+                    id=parent_id,
+                    chat=chat,
+                    is_deleted=False,
+                )
+            except (Message.DoesNotExist, ValueError, TypeError):
+                return Response(
+                    {"parent_id": ["Родительский комментарий не найден."]},
+                    status=status.HTTP_400_BAD_REQUEST,
+                )
+
+        message = comments_helpers.create_comment(
+            document,
+            request.user,
+            text,
+            reply_to=reply_to,
+        )
+        return Response(
+            self._document_comment_payload(document, message),
+            status=status.HTTP_201_CREATED,
+        )
+
+    @action(
+        detail=True,
+        methods=["patch", "delete"],
+        url_path=r"comments/(?P<comment_id>\d+)",
+        url_name="document-comment",
+    )
+    def document_comment(self, request, pk=None, comment_id=None):
+        """Редактирование автором и мягкое удаление комментария."""
+        from communications import comments_helpers
+        from communications.models import Message
+
+        document = self.get_object()
+        chat = comments_helpers.get_comments_chat_if_exists(document)
+        if chat is None:
+            return Response(
+                {"detail": "Комментарий не найден."},
+                status=status.HTTP_404_NOT_FOUND,
+            )
+        try:
+            message = Message.objects.get(
+                id=comment_id,
+                chat=chat,
+                is_deleted=False,
+            )
+        except Message.DoesNotExist:
+            return Response(
+                {"detail": "Комментарий не найден."},
+                status=status.HTTP_404_NOT_FOUND,
+            )
+
+        if request.method == "PATCH":
+            if message.author_id != request.user.id:
+                return Response(
+                    {"detail": "Редактировать комментарий может только его автор."},
+                    status=status.HTTP_403_FORBIDDEN,
+                )
+            text = str(request.data.get("text") or "").strip()
+            if not text:
+                return Response(
+                    {"text": ["Это поле не может быть пустым."]},
+                    status=status.HTTP_400_BAD_REQUEST,
+                )
+            comments_helpers.update_comment(
+                message,
+                text,
+                edited_by=request.user,
+            )
+            return Response(self._document_comment_payload(document, message))
+
+        if not (
+            message.author_id == request.user.id
+            or request.user.is_staff
+            or request.user.is_superuser
+        ):
+            return Response(
+                {"detail": "Нет прав на удаление комментария."},
+                status=status.HTTP_403_FORBIDDEN,
+            )
+        comments_helpers.delete_comment(
+            message,
+            deleted_by=request.user,
+            soft_delete=True,
+        )
+        return Response(status=status.HTTP_204_NO_CONTENT)
+
     @action(detail=True, methods=["get"])
     def acknowledgements(self, request, pk=None):
         """Ведомость ознакомлений: доступна пользователям с доступом к документу.
@@ -408,19 +677,7 @@ class DocumentViewSet(ModelViewSet):
         """
         doc = self.get_object()
         q = (request.query_params.get("search") or "").strip()
-        base = User.objects.filter(is_active=True)
-
-        if not doc.sent_to_all:
-            # Собираем ID получателей из recipients и departments
-            recipient_ids = set(doc.recipients.values_list("pk", flat=True))
-
-            # Добавляем активных сотрудников из отделов
-            for department in doc.departments.all():
-                recipient_ids.update(
-                    emp.id for emp in department.active_employees
-                )
-
-            base = base.filter(pk__in=recipient_ids)
+        base = document_acknowledgement_audience(doc)
 
         if q:
             base = base.filter(
diff --git a/backend/api/v1/procurement/serializers.py b/backend/api/v1/procurement/serializers.py
index 59f35dce..01a67e3b 100644
--- a/backend/api/v1/procurement/serializers.py
+++ b/backend/api/v1/procurement/serializers.py
@@ -25,6 +25,8 @@ from procurement.models import (
     MaintenanceRecord,
     ApprovalRoute,
     ProcurementItem,
+    ProcurementItemAttachment,
+    ProcurementRequestActivity,
     ProcurementRequest,
     ProcurementRequestView,
     ProcurementSettings,
@@ -42,6 +44,28 @@ PROBLEM_ITEM_STATUSES = {
     ProcurementItemExecutionStatus.DEFECTIVE,
 }
 
+
+class ProcurementRequestActivitySerializer(serializers.ModelSerializer):
+    actor = EmployeeBriefSerializer(read_only=True)
+    action_display = serializers.CharField(
+        source="get_action_display",
+        read_only=True,
+    )
+
+    class Meta:
+        model = ProcurementRequestActivity
+        fields = [
+            "id",
+            "action",
+            "action_display",
+            "actor",
+            "object_kind",
+            "object_id",
+            "metadata",
+            "created_at",
+        ]
+        read_only_fields = fields
+
 DATE_RE = re.compile(r"^\d{4}-\d{2}-\d{2}$")
 UNIT_DISPLAY_LABELS = {
     "шт": "штуки",
@@ -316,6 +340,34 @@ class ProcurementRequestSummaryMixin(serializers.Serializer):
         ]
 
 
+class ProcurementItemAttachmentSerializer(serializers.ModelSerializer):
+    uploaded_by_name = serializers.CharField(
+        source="uploaded_by.get_full_name",
+        read_only=True,
+    )
+    download_url = serializers.SerializerMethodField()
+
+    class Meta:
+        model = ProcurementItemAttachment
+        fields = [
+            "id",
+            "file_name",
+            "file_size",
+            "mime_type",
+            "uploaded_by",
+            "uploaded_by_name",
+            "created_at",
+            "download_url",
+        ]
+        read_only_fields = fields
+
+    def get_download_url(self, obj):
+        return (
+            f"/api/v1/procurement/items/{obj.item_id}/"
+            f"attachments/{obj.id}/"
+        )
+
+
 class ProcurementItemSerializer(serializers.ModelSerializer):
     """Сериализатор для позиций заявки."""
 
@@ -350,6 +402,11 @@ class ProcurementItemSerializer(serializers.ModelSerializer):
     )
     execution_status_display = serializers.SerializerMethodField()
     comments_count = serializers.SerializerMethodField()
+    attachments = ProcurementItemAttachmentSerializer(many=True, read_only=True)
+    attachments_count = serializers.IntegerField(
+        source="attachments.count",
+        read_only=True,
+    )
 
     @extend_schema_field(serializers.IntegerField())
     def get_comments_count(self, obj):
@@ -387,6 +444,8 @@ class ProcurementItemSerializer(serializers.ModelSerializer):
             "executor_comment",
             "initial_comment",
             "comments_count",
+            "attachments",
+            "attachments_count",
             "equipment",
             "created_at",
         ]
@@ -396,6 +455,8 @@ class ProcurementItemSerializer(serializers.ModelSerializer):
             "total_price",
             "execution_status_display",
             "comments_count",
+            "attachments",
+            "attachments_count",
         ]
 
     def validate(self, attrs):
@@ -451,6 +512,7 @@ class ProcurementItemCreateSerializer(serializers.ModelSerializer):
     class Meta:
         model = ProcurementItem
         fields = [
+            "id",
             "name",
             "description",
             "quantity",
@@ -466,6 +528,7 @@ class ProcurementItemCreateSerializer(serializers.ModelSerializer):
             "executor_comment",
             "initial_comment",
         ]
+        read_only_fields = ["id"]
 
     def validate(self, attrs):
         return _validate_item_quantities(attrs, self.instance)
@@ -873,6 +936,7 @@ class ProcurementRequestDetailSerializer(
     )
     is_editable = serializers.BooleanField(read_only=True)
     comments_count = serializers.IntegerField(read_only=True, default=0)
+    activity_count = serializers.SerializerMethodField()
     can_current_user_approve = serializers.SerializerMethodField()
     can_current_user_submit_for_approval = serializers.SerializerMethodField()
     can_current_user_start_work = serializers.SerializerMethodField()
@@ -905,6 +969,10 @@ class ProcurementRequestDetailSerializer(
         user = getattr(request, "user", None)
         return ProcurementApprovalResolver.user_can_process_items(user, obj)
 
+    @extend_schema_field(serializers.IntegerField())
+    def get_activity_count(self, obj):
+        return obj.activities.count()
+
     class Meta:
         model = ProcurementRequest
         fields = [
@@ -944,6 +1012,7 @@ class ProcurementRequestDetailSerializer(
             "required_approval_priorities",
             "is_editable",
             "comments_count",
+            "activity_count",
             "linked_tasks",
             "can_current_user_approve",
             "can_current_user_submit_for_approval",
@@ -980,6 +1049,7 @@ class ProcurementRequestDetailSerializer(
             "processing_department_name",
             "fulfillment_status_display",
             "comments_count",
+            "activity_count",
             "linked_tasks",
             "can_current_user_approve",
             "can_current_user_submit_for_approval",
diff --git a/backend/api/v1/procurement/views.py b/backend/api/v1/procurement/views.py
index 4363b3c1..f41cf1ac 100644
--- a/backend/api/v1/procurement/views.py
+++ b/backend/api/v1/procurement/views.py
@@ -1,12 +1,17 @@
 """ViewSets для API модуля закупок."""
 
+from pathlib import Path
+
 from django.contrib.contenttypes.models import ContentType
+from django.db import transaction
+from django.http import FileResponse, Http404
 from drf_spectacular.utils import OpenApiParameter, extend_schema
 from django.db.models import Q
 from django.utils import timezone
 from django_filters.rest_framework import DjangoFilterBackend
 from rest_framework import filters, permissions, status, viewsets
 from rest_framework.decorators import action
+from rest_framework.parsers import MultiPartParser
 from rest_framework.response import Response
 
 from employees.models import Department, EmployeeDepartment
@@ -26,11 +31,15 @@ from procurement.models import (
     EquipmentTransferLog,
     MaintenanceRecord,
     ProcurementItem,
+    ProcurementItemAttachment,
+    ProcurementActivityAction,
+    ProcurementActivityObjectKind,
     ProcurementRequest,
     ProcurementRequestView,
     ProcurementSettings,
     Supplier,
 )
+from procurement.activity import create_procurement_activity
 from procurement.notifications.handlers import (
     notify_executor_reassigned,
     notify_item_comment,
@@ -63,11 +72,13 @@ from .serializers import (
     ProcurementDepartmentStatsSerializer,
     ProcurementOverviewStatsSerializer,
     ProcurementItemSerializer,
+    ProcurementItemAttachmentSerializer,
     ProcurementManualApprovalStepsSerializer,
     ProcurementNotificationReadResponseSerializer,
     ProcurementRequestCreateOptionsSerializer,
     ProcurementRequestCreateSerializer,
     ProcurementRequestDetailSerializer,
+    ProcurementRequestActivitySerializer,
     ProcurementRequestListSerializer,
     SupplierSerializer,
 )
@@ -81,7 +92,10 @@ class ProcurementRequestViewSet(viewsets.ModelViewSet):
         "processing_department",
         "requestor",
         "executor",
-    ).prefetch_related("items", "approvals__approver")
+    ).prefetch_related(
+        "items__attachments__uploaded_by",
+        "approvals__approver",
+    )
     filter_backends = [
         DjangoFilterBackend,
         filters.SearchFilter,
@@ -116,10 +130,50 @@ class ProcurementRequestViewSet(viewsets.ModelViewSet):
             "notify_arrival",
             "set_viewed",
             "approval_options",
+            "activity",
         ]:
             return ProcurementRequestDetailSerializer
         return ProcurementRequestListSerializer
 
+    @action(detail=True, methods=["get"], url_path="activity")
+    def activity(self, request, pk=None):
+        procurement_request = self.get_object()
+        queryset = procurement_request.activities.select_related("actor").order_by(
+            "-created_at",
+            "-id",
+        )
+        serializer = ProcurementRequestActivitySerializer(queryset, many=True)
+        return Response(serializer.data)
+
+    def perform_update(self, serializer):
+        tracked_fields = [
+            "title",
+            "description",
+            "department_id",
+            "processing_department_id",
+            "urgency",
+            "actual_cost",
+        ]
+        before = {
+            field: getattr(serializer.instance, field)
+            for field in tracked_fields
+        }
+        procurement_request = serializer.save()
+        changed_fields = [
+            field
+            for field in tracked_fields
+            if before[field] != getattr(procurement_request, field)
+        ]
+        if changed_fields:
+            create_procurement_activity(
+                procurement_request,
+                self.request.user,
+                ProcurementActivityAction.UPDATED,
+                object_kind=ProcurementActivityObjectKind.REQUEST,
+                object_id=procurement_request.pk,
+                metadata={"fields": changed_fields},
+            )
+
     def get_permissions(self):
         """Выбрать права доступа в зависимости от действия."""
         if self.action in ["approve", "reject"]:
@@ -573,6 +627,14 @@ class ProcurementRequestViewSet(viewsets.ModelViewSet):
             message,
             actor=request.user,
         )
+        create_procurement_activity(
+            procurement_request,
+            request.user,
+            ProcurementActivityAction.COMMENT_ADDED,
+            object_kind=ProcurementActivityObjectKind.COMMENT,
+            object_id=message.pk,
+            metadata={"comment_text": message.content},
+        )
         author_ser = EmployeeBriefSerializer(message.author)
         return Response(
             {
@@ -626,6 +688,14 @@ class ProcurementRequestViewSet(viewsets.ModelViewSet):
             deleted_by=request.user,
             soft_delete=True,
         )
+        create_procurement_activity(
+            procurement_request,
+            request.user,
+            ProcurementActivityAction.COMMENT_REMOVED,
+            object_kind=ProcurementActivityObjectKind.COMMENT,
+            object_id=message.pk,
+            metadata={"comment_text": message.content},
+        )
         return Response(status=status.HTTP_204_NO_CONTENT)
 
     @action(detail=True, methods=["post"])
@@ -1042,9 +1112,24 @@ class ProcurementRequestViewSet(viewsets.ModelViewSet):
                 )
 
             procurement_request.executor = request.user
-            procurement_request.started_at = timezone.now()
-            procurement_request.save(
-                update_fields=["executor", "started_at", "updated_at"],
+            procurement_request._notification_actor = request.user
+            update_fields = ["executor", "updated_at"]
+            if procurement_request.started_at is None:
+                procurement_request.started_at = timezone.now()
+                update_fields.append("started_at")
+            procurement_request.save(update_fields=update_fields)
+            create_procurement_activity(
+                procurement_request,
+                request.user,
+                ProcurementActivityAction.EXECUTOR_REASSIGNED,
+                object_kind=ProcurementActivityObjectKind.REQUEST,
+                object_id=procurement_request.pk,
+                metadata={
+                    "previous_executor": previous_executor.get_full_name(),
+                    "previous_executor_id": previous_executor.pk,
+                    "new_executor": request.user.get_full_name(),
+                    "new_executor_id": request.user.pk,
+                },
             )
             notify_executor_reassigned(
                 procurement_request,
@@ -1183,6 +1268,14 @@ class ProcurementRequestViewSet(viewsets.ModelViewSet):
         procurement_request._notification_actor = request.user
         procurement_request.recalculate_fulfillment_status(save=True)
         procurement_request.refresh_from_db()
+        create_procurement_activity(
+            procurement_request,
+            request.user,
+            ProcurementActivityAction.ALL_ITEMS_RECEIVED,
+            object_kind=ProcurementActivityObjectKind.REQUEST,
+            object_id=procurement_request.pk,
+            metadata={"items_count": len(items_to_update)},
+        )
 
         serializer = self.get_serializer(procurement_request)
         return Response(serializer.data)
@@ -1208,6 +1301,13 @@ class ProcurementRequestViewSet(viewsets.ModelViewSet):
             )
 
         notify_request_arrival(procurement_request, actor=request.user)
+        create_procurement_activity(
+            procurement_request,
+            request.user,
+            ProcurementActivityAction.ARRIVAL_NOTIFIED,
+            object_kind=ProcurementActivityObjectKind.REQUEST,
+            object_id=procurement_request.pk,
+        )
         from django.contrib.contenttypes.models import ContentType
         from notifications.models import Notification
 
@@ -1333,6 +1433,16 @@ class ProcurementRequestViewSet(viewsets.ModelViewSet):
 class ProcurementItemViewSet(viewsets.ModelViewSet):
     """ViewSet для позиций заявок."""
 
+    EXECUTION_FIELDS = {
+        "actual_unit_price",
+        "execution_status",
+        "executor_comment",
+        "expected_delivery_dates",
+        "links",
+        "ordered_quantity",
+        "received_quantity",
+    }
+
     NOTIFICATION_TRACKED_FIELDS = [
         "name",
         "quantity",
@@ -1449,12 +1559,122 @@ class ProcurementItemViewSet(viewsets.ModelViewSet):
             "confirm_received",
             "cancel_received",
             "cancel_issue",
+            "attachments",
+            "attachment_detail",
         ]:
             permission_classes = [permissions.IsAuthenticated]
         else:
             permission_classes = [CanManageProcurementRequest]
         return [permission() for permission in permission_classes]
 
+    def _check_item_read_permission(self, item):
+        from rest_framework.exceptions import PermissionDenied
+
+        if not self._can_access_item_comments(self.request.user, item.request):
+            raise PermissionDenied("Нет доступа к этой позиции")
+
+    @action(
+        detail=True,
+        methods=["get", "post"],
+        parser_classes=[MultiPartParser],
+        url_path="attachments",
+    )
+    def attachments(self, request, pk=None):
+        item = self.get_object()
+        self._check_item_read_permission(item)
+
+        if request.method == "GET":
+            serializer = ProcurementItemAttachmentSerializer(
+                item.attachments.select_related("uploaded_by").all(),
+                many=True,
+                context=self.get_serializer_context(),
+            )
+            return Response(serializer.data)
+
+        self._check_item_edit_permission(item)
+        files = request.FILES.getlist("files")
+        if not files:
+            return Response(
+                {"files": "Выберите хотя бы один файл."},
+                status=status.HTTP_400_BAD_REQUEST,
+            )
+
+        created = [
+            ProcurementItemAttachment.objects.create(
+                item=item,
+                file=uploaded_file,
+                file_name=Path(uploaded_file.name).name,
+                file_size=uploaded_file.size,
+                mime_type=uploaded_file.content_type or "",
+                uploaded_by=request.user,
+            )
+            for uploaded_file in files
+        ]
+        for attachment in created:
+            create_procurement_activity(
+                item.request,
+                request.user,
+                ProcurementActivityAction.ATTACHMENT_ADDED,
+                object_kind=ProcurementActivityObjectKind.ATTACHMENT,
+                object_id=attachment.pk,
+                metadata={
+                    "item_id": item.pk,
+                    "item_name": item.name,
+                    "file_name": attachment.file_name,
+                },
+            )
+        serializer = ProcurementItemAttachmentSerializer(
+            created,
+            many=True,
+            context=self.get_serializer_context(),
+        )
+        return Response(serializer.data, status=status.HTTP_201_CREATED)
+
+    @action(
+        detail=True,
+        methods=["get", "delete"],
+        url_path=r"attachments/(?P<attachment_id>\d+)",
+    )
+    def attachment_detail(self, request, pk=None, attachment_id=None):
+        item = self.get_object()
+        self._check_item_read_permission(item)
+        try:
+            attachment = item.attachments.get(pk=attachment_id)
+        except ProcurementItemAttachment.DoesNotExist as exc:
+            raise Http404 from exc
+
+        if request.method == "DELETE":
+            self._check_item_edit_permission(item)
+            attachment_id_value = attachment.pk
+            file_name = attachment.file_name
+            attachment.delete()
+            create_procurement_activity(
+                item.request,
+                request.user,
+                ProcurementActivityAction.ATTACHMENT_REMOVED,
+                object_kind=ProcurementActivityObjectKind.ATTACHMENT,
+                object_id=attachment_id_value,
+                metadata={
+                    "item_id": item.pk,
+                    "item_name": item.name,
+                    "file_name": file_name,
+                },
+            )
+            return Response(status=status.HTTP_204_NO_CONTENT)
+
+        if not attachment.file or not attachment.file.name:
+            raise Http404
+        try:
+            file_handle = attachment.file.open("rb")
+        except FileNotFoundError as exc:
+            raise Http404 from exc
+        return FileResponse(
+            file_handle,
+            as_attachment=True,
+            filename=attachment.file_name,
+            content_type=attachment.mime_type or "application/octet-stream",
+        )
+
     def _can_use_item_quick_action(self, user, procurement_request):
         return (
             procurement_request.requestor_id == user.id
@@ -1498,6 +1718,19 @@ class ProcurementItemViewSet(viewsets.ModelViewSet):
             return ProcurementItemExecutionStatus.ORDERED
         return ProcurementItemExecutionStatus.PENDING
 
+    def _record_item_update(self, item, user, changed_fields):
+        create_procurement_activity(
+            item.request,
+            user,
+            ProcurementActivityAction.ITEM_UPDATED,
+            object_kind=ProcurementActivityObjectKind.ITEM,
+            object_id=item.pk,
+            metadata={
+                "item_name": item.name,
+                "fields": list(changed_fields),
+            },
+        )
+
     def _reopen_completed_request(self, procurement_request, user):
         if procurement_request.status != ProcurementStatus.COMPLETED:
             return
@@ -1596,15 +1829,59 @@ class ProcurementItemViewSet(viewsets.ModelViewSet):
         # Нет прав
         raise PermissionDenied("Вы не можете изменять позиции в этой заявке")
 
+    def _starts_execution(self, item, validated_data):
+        """Проверить, меняются ли данные из блока исполнения позиции."""
+        return any(
+            field in validated_data
+            and getattr(item, field) != validated_data[field]
+            for field in self.EXECUTION_FIELDS
+        )
+
+    def _start_request_for_execution(self, procurement_request):
+        """Назначить исполнителя при первом заполнении исполнения позиции."""
+        user = self.request.user
+        if (
+            procurement_request.status
+            not in {ProcurementStatus.APPROVED, ProcurementStatus.WAITING}
+            or procurement_request.executor_id
+            or not self._can_process_request_items(user, procurement_request)
+            or not ProcurementApprovalResolver.user_can_start_work(
+                user,
+                procurement_request,
+            )
+        ):
+            return
+
+        procurement_request.executor = user
+        procurement_request.status = ProcurementStatus.IN_PROGRESS
+        if procurement_request.started_at is None:
+            procurement_request.started_at = timezone.now()
+        procurement_request._notification_actor = user
+        procurement_request.save(
+            update_fields=[
+                "executor",
+                "status",
+                "started_at",
+                "updated_at",
+            ]
+        )
+
+    @transaction.atomic
     def perform_update(self, serializer):
         """Проверяем права при обновлении позиции."""
         item = self.get_object()
+        procurement_request = ProcurementRequest.objects.select_for_update().get(
+            pk=item.request_id,
+        )
+        item.request = procurement_request
+        serializer.instance.request = procurement_request
         self._check_item_edit_permission(item)
-        procurement_request = item.request
         before = {
             field: getattr(item, field)
             for field in self.NOTIFICATION_TRACKED_FIELDS
         }
+        if self._starts_execution(item, serializer.validated_data):
+            self._start_request_for_execution(procurement_request)
         procurement_request._notification_actor = self.request.user
         updated_item = serializer.save()
         after = {
@@ -1622,6 +1899,11 @@ class ProcurementItemViewSet(viewsets.ModelViewSet):
                 actor=self.request.user,
                 changed_fields=changed_fields,
             )
+            self._record_item_update(
+                updated_item,
+                self.request.user,
+                changed_fields,
+            )
 
     @action(detail=True, methods=["post"])
     def report_issue(self, request, pk=None):
@@ -1662,6 +1944,7 @@ class ProcurementItemViewSet(viewsets.ModelViewSet):
             actor=user,
             changed_fields=["execution_status"],
         )
+        self._record_item_update(item, user, ["execution_status"])
         if procurement_request.requestor_id == user.id:
             notify_item_issue_reported(item, actor=user)
 
@@ -1739,6 +2022,11 @@ class ProcurementItemViewSet(viewsets.ModelViewSet):
                 "received_quantity",
             ],
         )
+        self._record_item_update(
+            item,
+            user,
+            ["execution_status", "ordered_quantity", "received_quantity"],
+        )
 
         item.refresh_from_db()
         serializer = self.get_serializer(item)
@@ -1771,6 +2059,7 @@ class ProcurementItemViewSet(viewsets.ModelViewSet):
             actor=user,
             changed_fields=["execution_status"],
         )
+        self._record_item_update(item, user, ["execution_status"])
 
         item.refresh_from_db()
         serializer = self.get_serializer(item)
@@ -1849,6 +2138,11 @@ class ProcurementItemViewSet(viewsets.ModelViewSet):
                 "received_quantity",
             ],
         )
+        self._record_item_update(
+            item,
+            user,
+            ["execution_status", "ordered_quantity", "received_quantity"],
+        )
 
         item.refresh_from_db()
         serializer = self.get_serializer(item)
@@ -1907,6 +2201,18 @@ class ProcurementItemViewSet(viewsets.ModelViewSet):
             message,
             actor=request.user,
         )
+        create_procurement_activity(
+            item.request,
+            request.user,
+            ProcurementActivityAction.COMMENT_ADDED,
+            object_kind=ProcurementActivityObjectKind.COMMENT,
+            object_id=message.pk,
+            metadata={
+                "item_id": item.pk,
+                "item_name": item.name,
+                "comment_text": message.content,
+            },
+        )
         author_ser = EmployeeBriefSerializer(message.author)
         return Response(
             {
@@ -1967,6 +2273,18 @@ class ProcurementItemViewSet(viewsets.ModelViewSet):
             deleted_by=request.user,
             soft_delete=True,
         )
+        create_procurement_activity(
+            item.request,
+            request.user,
+            ProcurementActivityAction.COMMENT_REMOVED,
+            object_kind=ProcurementActivityObjectKind.COMMENT,
+            object_id=message.pk,
+            metadata={
+                "item_id": item.pk,
+                "item_name": item.name,
+                "comment_text": message.content,
+            },
+        )
         return Response(status=status.HTTP_204_NO_CONTENT)
 
     @action(detail=True, methods=["post"])
diff --git a/backend/api/v1/schedule/views.py b/backend/api/v1/schedule/views.py
index 7fb74fe2..16904335 100644
--- a/backend/api/v1/schedule/views.py
+++ b/backend/api/v1/schedule/views.py
@@ -465,6 +465,9 @@ class ScheduleEventViewSet(viewsets.ModelViewSet):
         if calendar_id:
             qs = qs.filter(calendar_id=calendar_id)
 
+        if search := self.request.query_params.get("search", "").strip():
+            qs = qs.filter(Q(title__icontains=search) | Q(description__icontains=search))
+
         # Фильтр по диапазону дат
         start_str = self.request.query_params.get("start")
         end_str = self.request.query_params.get("end")
diff --git a/backend/api/v1/tasks/serializers.py b/backend/api/v1/tasks/serializers.py
index 9f66e008..39d43f75 100644
--- a/backend/api/v1/tasks/serializers.py
+++ b/backend/api/v1/tasks/serializers.py
@@ -1,6 +1,9 @@
+from urllib.parse import urlsplit
+
 from django.db.models import Max
 from django.contrib.auth import get_user_model
 from django.contrib.contenttypes.models import ContentType
+from django.urls import reverse
 from django.utils import timezone
 from drf_spectacular.utils import extend_schema_field
 from rest_framework import serializers
@@ -37,8 +40,12 @@ from tasks.access import (
 from tasks.models import (
     Task,
     TaskActivity,
+    TaskAttachment,
     TaskBoard,
+    TaskBoardAccessScope,
+    TaskChecklistItem,
     TaskColumn,
+    TaskExternalLink,
     TaskLabel,
     TaskLinkedObject,
     TaskLinkedObjectKind,
@@ -162,6 +169,9 @@ class TaskSerializer(serializers.ModelSerializer):
     linked_attendance_records_count = serializers.SerializerMethodField()
     linked_objects_count = serializers.SerializerMethodField()
     comments_count = serializers.SerializerMethodField()
+    attachments_count = serializers.SerializerMethodField()
+    checklist_total = serializers.SerializerMethodField()
+    checklist_completed = serializers.SerializerMethodField()
 
     class Meta:
         model = Task
@@ -196,6 +206,9 @@ class TaskSerializer(serializers.ModelSerializer):
             "linked_attendance_records_count",
             "linked_objects_count",
             "comments_count",
+            "attachments_count",
+            "checklist_total",
+            "checklist_completed",
             "created_at",
             "updated_at",
         ]
@@ -219,6 +232,9 @@ class TaskSerializer(serializers.ModelSerializer):
             "linked_attendance_records_count",
             "linked_objects_count",
             "comments_count",
+            "attachments_count",
+            "checklist_total",
+            "checklist_completed",
             "created_at",
             "updated_at",
         ]
@@ -307,7 +323,7 @@ class TaskSerializer(serializers.ModelSerializer):
     def get_linked_objects_count(self, obj):
         if hasattr(obj, "linked_objects_count"):
             return obj.linked_objects_count
-        return obj.linked_objects.count()
+        return obj.linked_objects.count() + obj.external_links.count()
 
     @extend_schema_field(serializers.IntegerField())
     def get_comments_count(self, obj):
@@ -315,6 +331,29 @@ class TaskSerializer(serializers.ModelSerializer):
             return obj.comments_count
         return get_comment_count(obj)
 
+    @extend_schema_field(serializers.IntegerField())
+    def get_attachments_count(self, obj):
+        if hasattr(obj, "attachments_count"):
+            return obj.attachments_count
+        return obj.attachments.count()
+
+    @extend_schema_field(serializers.IntegerField())
+    def get_checklist_total(self, obj):
+        if hasattr(obj, "checklist_total"):
+            return obj.checklist_total
+        return obj.checklist_items.count()
+
+    @extend_schema_field(serializers.IntegerField())
+    def get_checklist_completed(self, obj):
+        if hasattr(obj, "checklist_completed"):
+            return obj.checklist_completed
+        prefetched = getattr(obj, "_prefetched_objects_cache", {}).get(
+            "checklist_items"
+        )
+        if prefetched is not None:
+            return sum(item.is_completed for item in prefetched)
+        return obj.checklist_items.filter(is_completed=True).count()
+
     def validate(self, attrs):
         request = self.context.get("request")
         user = getattr(request, "user", None)
@@ -401,6 +440,7 @@ class TaskBoardSerializer(serializers.ModelSerializer):
             "id",
             "name",
             "description",
+            "access_scope",
             "created_by",
             "members",
             "member_details",
@@ -416,6 +456,28 @@ class TaskBoardSerializer(serializers.ModelSerializer):
             "updated_at",
         ]
 
+    def validate(self, attrs):
+        attrs = super().validate(attrs)
+        access_scope = attrs.get("access_scope")
+        if access_scope is None:
+            has_members = bool(attrs.get("members"))
+            has_departments = bool(attrs.get("departments"))
+            if has_members or has_departments:
+                access_scope = TaskBoardAccessScope.RESTRICTED
+            elif "members" in attrs and "departments" in attrs:
+                access_scope = TaskBoardAccessScope.ALL
+            else:
+                access_scope = getattr(
+                    self.instance,
+                    "access_scope",
+                    TaskBoardAccessScope.ALL,
+                )
+            attrs["access_scope"] = access_scope
+        if access_scope != TaskBoardAccessScope.RESTRICTED:
+            attrs["members"] = []
+            attrs["departments"] = []
+        return attrs
+
     @extend_schema_field(serializers.BooleanField())
     def get_is_default_for_current_user(self, obj):
         request = self.context.get("request")
@@ -572,6 +634,89 @@ class TaskActivitySerializer(serializers.ModelSerializer):
         read_only_fields = fields
 
 
+class TaskAttachmentSerializer(serializers.ModelSerializer):
+    uploaded_by = EmployeeBriefSerializer(read_only=True)
+    download_url = serializers.SerializerMethodField()
+
+    class Meta:
+        model = TaskAttachment
+        fields = [
+            "id",
+            "task",
+            "file_name",
+            "file_size",
+            "mime_type",
+            "uploaded_by",
+            "created_at",
+            "download_url",
+        ]
+        read_only_fields = fields
+
+    @extend_schema_field(serializers.URLField())
+    def get_download_url(self, obj):
+        url = reverse(
+            "api:v1:tasks:task-attachment-download",
+            kwargs={"pk": obj.task_id, "attachment_id": obj.id},
+        )
+        request = self.context.get("request")
+        return request.build_absolute_uri(url) if request else url
+
+
+class TaskChecklistItemSerializer(serializers.ModelSerializer):
+    created_by = EmployeeBriefSerializer(read_only=True)
+    completed_by = EmployeeBriefSerializer(read_only=True)
+
+    class Meta:
+        model = TaskChecklistItem
+        fields = [
+            "id",
+            "task",
+            "title",
+            "position",
+            "is_completed",
+            "created_by",
+            "completed_by",
+            "completed_at",
+            "created_at",
+            "updated_at",
+        ]
+        read_only_fields = [
+            "id",
+            "task",
+            "created_by",
+            "completed_by",
+            "completed_at",
+            "created_at",
+            "updated_at",
+        ]
+
+    def validate_title(self, value):
+        value = value.strip()
+        if not value:
+            raise serializers.ValidationError("Введите текст пункта чек-листа.")
+        return value
+
+
+class TaskExternalLinkSerializer(serializers.ModelSerializer):
+    created_by = EmployeeBriefSerializer(read_only=True)
+
+    class Meta:
+        model = TaskExternalLink
+        fields = ["id", "task", "url", "title", "created_by", "created_at"]
+        read_only_fields = ["id", "task", "created_by", "created_at"]
+
+    def validate_url(self, value):
+        value = value.strip()
+        if urlsplit(value).scheme.lower() not in {"http", "https"}:
+            raise serializers.ValidationError(
+                "Разрешены только ссылки с протоколом http или https."
+            )
+        return value
+
+    def validate_title(self, value):
+        return value.strip()
+
+
 class TaskLinkedCalendarEventSerializer(serializers.ModelSerializer):
     created_by = EmployeeBriefSerializer(read_only=True)
     event = serializers.SerializerMethodField()
diff --git a/backend/api/v1/tasks/views.py b/backend/api/v1/tasks/views.py
index ebeed54e..1e580a25 100644
--- a/backend/api/v1/tasks/views.py
+++ b/backend/api/v1/tasks/views.py
@@ -1,5 +1,10 @@
+import mimetypes
+from pathlib import Path
+from urllib.parse import urlsplit
+
 from django.contrib.contenttypes.models import ContentType
 from django.contrib.auth import get_user_model
+from django.db import transaction
 from django.db.models import (
     Count,
     IntegerField,
@@ -10,6 +15,9 @@ from django.db.models import (
     Value,
 )
 from django.db.models.functions import Coalesce
+from django.http import FileResponse
+from django.shortcuts import get_object_or_404
+from django.utils import timezone
 from attendance.models import AttendanceRecord
 from communications import comments_helpers
 from communications.models import Message
@@ -19,7 +27,7 @@ from feed.models import Post
 from guests.models import Guest, GuestVisit
 from procurement.models import ProcurementRequest
 from requests_app.models import Request as EmployeeRequest
-from rest_framework import filters, status, viewsets
+from rest_framework import filters, parsers, status, viewsets
 from rest_framework.decorators import action
 from rest_framework.permissions import IsAuthenticated
 from rest_framework.response import Response
@@ -41,8 +49,11 @@ from tasks.models import (
     Task,
     TaskActivity,
     TaskActivityAction,
+    TaskActivityObjectKind,
+    TaskAttachment,
     TaskBoard,
     TaskColumn,
+    TaskExternalLink,
     TaskLabel,
     TaskLinkedObject,
     TaskLinkedObjectKind,
@@ -63,8 +74,11 @@ from tasks.realtime import (
 from .serializers import (
     EmployeeBriefSerializer,
     TaskActivitySerializer,
+    TaskAttachmentSerializer,
     TaskBoardSerializer,
+    TaskChecklistItemSerializer,
     TaskColumnSerializer,
+    TaskExternalLinkSerializer,
     TaskLabelSerializer,
     TaskLinkedCalendarEventSerializer,
     TaskLinkedAttendanceRecordSerializer,
@@ -123,6 +137,22 @@ def normalize_column_positions(column):
         Task.objects.filter(id=task_id).update(position=(index + 1) * 1000)
 
 
+def send_task_checklist_update(task, event, item_id):
+    send_task_board_update(
+        task.board,
+        event,
+        "checklist_item",
+        item_id,
+        extra={
+            "task_id": task.id,
+            "checklist_total": task.checklist_items.count(),
+            "checklist_completed": task.checklist_items.filter(
+                is_completed=True
+            ).count(),
+        },
+    )
+
+
 class TaskBoardViewSet(viewsets.ModelViewSet):
     permission_classes = [IsAuthenticated]
     serializer_class = TaskBoardSerializer
@@ -141,6 +171,9 @@ class TaskBoardViewSet(viewsets.ModelViewSet):
                 "tasks__assignee",
                 "tasks__labels",
                 "tasks__linked_objects",
+                "tasks__external_links",
+                "tasks__attachments",
+                "tasks__checklist_items",
             )
             .annotate(tasks_count=Count("tasks", distinct=True))
             .distinct()
@@ -330,7 +363,7 @@ class TaskViewSet(viewsets.ModelViewSet):
                 )
             )
             .select_related("board", "column", "created_by", "assignee")
-            .prefetch_related("labels")
+            .prefetch_related("labels", "checklist_items")
             .annotate(
                 linked_posts_count=Count(
                     "linked_objects",
@@ -402,11 +435,21 @@ class TaskViewSet(viewsets.ModelViewSet):
                     ),
                     distinct=True,
                 ),
-                linked_objects_count=Count("linked_objects", distinct=True),
+                linked_objects_count=(
+                    Count("linked_objects", distinct=True)
+                    + Count("external_links", distinct=True)
+                ),
                 comments_count=Coalesce(
                     Subquery(comments_subquery, output_field=IntegerField()),
                     Value(0),
                 ),
+                attachments_count=Count("attachments", distinct=True),
+                checklist_total=Count("checklist_items", distinct=True),
+                checklist_completed=Count(
+                    "checklist_items",
+                    filter=Q(checklist_items__is_completed=True),
+                    distinct=True,
+                ),
             )
         )
         params = self.request.query_params
@@ -471,6 +514,49 @@ class TaskViewSet(viewsets.ModelViewSet):
         instance.delete()
         send_task_board_update(board, "deleted", "task", task_id)
 
+    def _move_task(self, task, column, position, actor):
+        old_column = task.column
+        if position in (None, ""):
+            max_position = (
+                Task.objects.filter(column=column).exclude(id=task.id).aggregate(
+                    Max("position")
+                )["position__max"]
+                or 0
+            )
+            position = max_position + 1000
+
+        task.column = column
+        task.position = position
+        task.save(
+            update_fields=["column", "position", "completed_at", "updated_at"]
+        )
+
+        normalize_column_positions(column)
+        if old_column.id != column.id:
+            normalize_column_positions(old_column)
+        task.refresh_from_db()
+
+        create_task_activity(
+            task,
+            actor,
+            TaskActivityAction.MOVED,
+            metadata={
+                "from_column_id": old_column.id,
+                "from_column": old_column.name,
+                "to_column_id": column.id,
+                "to_column": column.name,
+            },
+        )
+        notify_task_moved(task, actor, old_column, column)
+        send_task_board_update(
+            task.board,
+            "moved",
+            "task",
+            task.id,
+            extra={"column_id": task.column_id},
+        )
+        return task
+
     @action(detail=True, methods=["post"])
     def move(self, request, pk=None):
         task = self.get_object()
@@ -494,15 +580,8 @@ class TaskViewSet(viewsets.ModelViewSet):
                 status=status.HTTP_400_BAD_REQUEST,
             )
 
-        old_column = task.column
         if position in (None, ""):
-            max_position = (
-                Task.objects.filter(column=column).exclude(id=task.id).aggregate(
-                    Max("position")
-                )["position__max"]
-                or 0
-            )
-            position = max_position + 1000
+            position = None
         else:
             try:
                 position = int(position)
@@ -512,37 +591,88 @@ class TaskViewSet(viewsets.ModelViewSet):
                     status=status.HTTP_400_BAD_REQUEST,
                 )
 
-        task.column = column
-        task.position = position
-        task.save(update_fields=["column", "position", "completed_at", "updated_at"])
-
-        normalize_column_positions(column)
-        if old_column.id != column.id:
-            normalize_column_positions(old_column)
-        task.refresh_from_db()
-
+        task = self._move_task(task, column, position, request.user)
         serializer = self.get_serializer(task)
-        create_task_activity(
-            task,
-            request.user,
-            TaskActivityAction.MOVED,
-            metadata={
-                "from_column_id": old_column.id,
-                "from_column": old_column.name,
-                "to_column_id": column.id,
-                "to_column": column.name,
-            },
-        )
-        notify_task_moved(task, request.user, old_column, column)
-        send_task_board_update(
-            task.board,
-            "moved",
-            "task",
-            task.id,
-            extra={"column_id": task.column_id},
-        )
         return Response(serializer.data)
 
+    @action(detail=True, methods=["post"])
+    def claim(self, request, pk=None):
+        visible_task = self.get_object()
+        with transaction.atomic():
+            task = (
+                Task.objects.select_for_update()
+                .select_related("board", "column", "assignee")
+                .get(id=visible_task.id)
+            )
+
+            if task.completed_at or task.column.is_done:
+                return Response(
+                    {"detail": "Нельзя взять в работу завершённую задачу."},
+                    status=status.HTTP_400_BAD_REQUEST,
+                )
+
+            if task.assignee_id:
+                if task.assignee_id == request.user.id:
+                    return Response(self.get_serializer(task).data)
+                return Response(
+                    {"detail": "У задачи уже есть исполнитель."},
+                    status=status.HTTP_409_CONFLICT,
+                )
+
+            task.assignee = request.user
+            task.save(update_fields=["assignee", "updated_at"])
+            create_task_activity(
+                task,
+                request.user,
+                TaskActivityAction.CLAIMED,
+                metadata={"assignee_id": request.user.id},
+            )
+            notify_task_updated(
+                task,
+                request.user,
+                {"assignee_id": None},
+                {"assignee_id": request.user.id},
+            )
+            send_task_board_update(
+                task.board,
+                "claimed",
+                "task",
+                task.id,
+                extra={"assignee_id": request.user.id},
+            )
+
+        return Response(self.get_serializer(task).data)
+
+    @action(detail=True, methods=["post"])
+    def complete(self, request, pk=None):
+        task = self.get_object()
+        if task.assignee_id != request.user.id:
+            return Response(
+                {"detail": "Завершить задачу может только назначенный исполнитель."},
+                status=status.HTTP_403_FORBIDDEN,
+            )
+
+        if task.column.is_done:
+            return Response(self.get_serializer(task).data)
+
+        done_column = (
+            TaskColumn.objects.filter(
+                board_id=task.board_id,
+                is_done=True,
+                is_archived=False,
+            )
+            .order_by("position", "id")
+            .first()
+        )
+        if done_column is None:
+            return Response(
+                {"detail": "На доске не настроена завершающая колонка."},
+                status=status.HTTP_400_BAD_REQUEST,
+            )
+
+        task = self._move_task(task, done_column, None, request.user)
+        return Response(self.get_serializer(task).data)
+
     @action(detail=True, methods=["get"], url_path="activity")
     def activity(self, request, pk=None):
         task = self.get_object()
@@ -553,12 +683,343 @@ class TaskViewSet(viewsets.ModelViewSet):
         serializer = TaskActivitySerializer(queryset, many=True)
         return Response(serializer.data)
 
+    @action(
+        detail=True,
+        methods=["get", "post"],
+        url_path="attachments",
+        parser_classes=[parsers.MultiPartParser, parsers.FormParser],
+    )
+    def attachments(self, request, pk=None):
+        task = self.get_object()
+        if request.method in ("GET", "HEAD"):
+            queryset = task.attachments.select_related("uploaded_by")
+            serializer = TaskAttachmentSerializer(
+                queryset,
+                many=True,
+                context=self.get_serializer_context(),
+            )
+            return Response(serializer.data)
+
+        files = request.FILES.getlist("files")
+        if not files and request.FILES.get("file"):
+            files = [request.FILES["file"]]
+        if not files:
+            return Response(
+                {"files": ["Выберите хотя бы один файл."]},
+                status=status.HTTP_400_BAD_REQUEST,
+            )
+
+        created = []
+        for uploaded in files:
+            file_name = Path(uploaded.name.replace("\\", "/")).name[:255]
+            attachment = TaskAttachment.objects.create(
+                task=task,
+                file=uploaded,
+                file_name=file_name,
+                file_size=uploaded.size,
+                mime_type=(uploaded.content_type or "")[:255],
+                uploaded_by=request.user,
+            )
+            created.append(attachment)
+            create_task_activity(
+                task,
+                request.user,
+                TaskActivityAction.ATTACHMENT_ADDED,
+                object_id=attachment.id,
+                metadata={"file_name": attachment.file_name},
+            )
+
+        send_task_board_update(
+            task.board,
+            "attachments_updated",
+            "task",
+            task.id,
+            extra={"attachments_count": task.attachments.count()},
+        )
+        serializer = TaskAttachmentSerializer(
+            created,
+            many=True,
+            context=self.get_serializer_context(),
+        )
+        return Response(serializer.data, status=status.HTTP_201_CREATED)
+
+    @action(
+        detail=True,
+        methods=["get"],
+        url_path=r"attachments/(?P<attachment_id>\d+)/download",
+        url_name="attachment-download",
+    )
+    def attachment_download(self, request, pk=None, attachment_id=None):
+        task = self.get_object()
+        attachment = get_object_or_404(
+            task.attachments,
+            id=attachment_id,
+        )
+        try:
+            file_handle = attachment.file.open("rb")
+        except (FileNotFoundError, OSError):
+            return Response(
+                {"detail": "Файл не найден в хранилище."},
+                status=status.HTTP_404_NOT_FOUND,
+            )
+
+        content_type = attachment.mime_type or (
+            mimetypes.guess_type(attachment.file_name)[0]
+            or "application/octet-stream"
+        )
+        response = FileResponse(
+            file_handle,
+            as_attachment=True,
+            filename=attachment.file_name,
+            content_type=content_type,
+        )
+        response["X-Content-Type-Options"] = "nosniff"
+        return response
+
+    @action(
+        detail=True,
+        methods=["delete"],
+        url_path=r"attachments/(?P<attachment_id>\d+)",
+        url_name="attachment-detail",
+    )
+    def attachment_detail(self, request, pk=None, attachment_id=None):
+        task = self.get_object()
+        attachment = get_object_or_404(
+            task.attachments,
+            id=attachment_id,
+        )
+        attachment_id = attachment.id
+        file_name = attachment.file_name
+        attachment.delete()
+        create_task_activity(
+            task,
+            request.user,
+            TaskActivityAction.ATTACHMENT_REMOVED,
+            object_id=attachment_id,
+            metadata={"file_name": file_name},
+        )
+        send_task_board_update(
+            task.board,
+            "attachments_updated",
+            "task",
+            task.id,
+            extra={"attachments_count": task.attachments.count()},
+        )
+        return Response(status=status.HTTP_204_NO_CONTENT)
+
+    @action(detail=True, methods=["get", "post"], url_path="checklist")
+    def checklist(self, request, pk=None):
+        task = self.get_object()
+        if request.method in ("GET", "HEAD"):
+            serializer = TaskChecklistItemSerializer(
+                task.checklist_items.select_related("created_by", "completed_by"),
+                many=True,
+            )
+            return Response(serializer.data)
+
+        serializer = TaskChecklistItemSerializer(data=request.data)
+        serializer.is_valid(raise_exception=True)
+        position = serializer.validated_data.get("position")
+        if position is None:
+            max_position = (
+                task.checklist_items.aggregate(Max("position"))["position__max"] or 0
+            )
+            position = max_position + 1000
+        is_completed = serializer.validated_data.get("is_completed", False)
+        item = serializer.save(
+            task=task,
+            created_by=request.user,
+            position=position,
+            completed_by=request.user if is_completed else None,
+            completed_at=timezone.now() if is_completed else None,
+        )
+        create_task_activity(
+            task,
+            request.user,
+            TaskActivityAction.CHECKLIST_ITEM_ADDED,
+            object_kind=TaskActivityObjectKind.CHECKLIST_ITEM,
+            object_id=item.id,
+            metadata={
+                "item_title": item.title,
+                "is_completed": item.is_completed,
+            },
+        )
+        send_task_checklist_update(task, "checklist_updated", item.id)
+        return Response(
+            TaskChecklistItemSerializer(item).data,
+            status=status.HTTP_201_CREATED,
+        )
+
+    @action(
+        detail=True,
+        methods=["patch", "delete"],
+        url_path=r"checklist/(?P<item_id>\d+)",
+        url_name="checklist-item-detail",
+    )
+    def checklist_item_detail(self, request, pk=None, item_id=None):
+        task = self.get_object()
+        item = get_object_or_404(task.checklist_items, id=item_id)
+
+        if request.method == "DELETE":
+            item_id = item.id
+            item_title = item.title
+            item.delete()
+            create_task_activity(
+                task,
+                request.user,
+                TaskActivityAction.CHECKLIST_ITEM_REMOVED,
+                object_kind=TaskActivityObjectKind.CHECKLIST_ITEM,
+                object_id=item_id,
+                metadata={"item_title": item_title},
+            )
+            send_task_checklist_update(task, "checklist_updated", item_id)
+            return Response(status=status.HTTP_204_NO_CONTENT)
+
+        serializer = TaskChecklistItemSerializer(
+            item,
+            data=request.data,
+            partial=True,
+        )
+        serializer.is_valid(raise_exception=True)
+        previous_title = item.title
+        previous_completed = item.is_completed
+        changed_fields = [
+            field
+            for field, value in serializer.validated_data.items()
+            if getattr(item, field) != value
+        ]
+        if not changed_fields:
+            return Response(TaskChecklistItemSerializer(item).data)
+
+        completion_metadata = {}
+        if "is_completed" in serializer.validated_data:
+            is_completed = serializer.validated_data["is_completed"]
+            completion_metadata = {
+                "completed_by": request.user if is_completed else None,
+                "completed_at": timezone.now() if is_completed else None,
+            }
+        item = serializer.save(**completion_metadata)
+        if previous_completed != item.is_completed:
+            activity_action = (
+                TaskActivityAction.CHECKLIST_ITEM_COMPLETED
+                if item.is_completed
+                else TaskActivityAction.CHECKLIST_ITEM_REOPENED
+            )
+        else:
+            activity_action = TaskActivityAction.CHECKLIST_ITEM_UPDATED
+        create_task_activity(
+            task,
+            request.user,
+            activity_action,
+            object_kind=TaskActivityObjectKind.CHECKLIST_ITEM,
+            object_id=item.id,
+            metadata={
+                "item_title": item.title,
+                "previous_title": previous_title,
+                "is_completed": item.is_completed,
+                "fields": changed_fields,
+            },
+        )
+        send_task_checklist_update(task, "checklist_updated", item.id)
+        return Response(TaskChecklistItemSerializer(item).data)
+
+    @action(detail=True, methods=["get", "post"], url_path="external-links")
+    def external_links(self, request, pk=None):
+        task = self.get_object()
+        if request.method in ("GET", "HEAD"):
+            serializer = TaskExternalLinkSerializer(
+                task.external_links.select_related("created_by"),
+                many=True,
+            )
+            return Response(serializer.data)
+
+        input_serializer = TaskExternalLinkSerializer(data=request.data)
+        input_serializer.is_valid(raise_exception=True)
+        url = input_serializer.validated_data["url"]
+        title = input_serializer.validated_data.get("title", "")
+        default_title = title or urlsplit(url).netloc or url
+        link, created = TaskExternalLink.objects.get_or_create(
+            task=task,
+            url=url,
+            defaults={
+                "title": default_title,
+                "created_by": request.user,
+            },
+        )
+        if not created and title and title != link.title:
+            link.title = title
+            link.save(update_fields=["title"])
+
+        if created:
+            create_task_activity(
+                task,
+                request.user,
+                TaskActivityAction.LINKED,
+                object_kind=TaskActivityObjectKind.EXTERNAL_LINK,
+                object_id=link.id,
+                metadata={
+                    "object_label": link.title or link.url,
+                    "object_type": "Ссылка",
+                    "url": link.url,
+                },
+            )
+        send_task_board_update(
+            task.board,
+            "linked",
+            "external_link",
+            link.id,
+            extra={"task_id": task.id, "link_id": link.id},
+        )
+        serializer = TaskExternalLinkSerializer(link)
+        return Response(
+            serializer.data,
+            status=(
+                status.HTTP_201_CREATED if created else status.HTTP_200_OK
+            ),
+        )
+
+    @action(
+        detail=True,
+        methods=["delete"],
+        url_path=r"external-links/(?P<link_id>\d+)",
+        url_name="external-link-detail",
+    )
+    def external_link_detail(self, request, pk=None, link_id=None):
+        task = self.get_object()
+        link = get_object_or_404(task.external_links, id=link_id)
+        link_id = link.id
+        title = link.title or link.url
+        url = link.url
+        link.delete()
+        create_task_activity(
+            task,
+            request.user,
+            TaskActivityAction.UNLINKED,
+            object_kind=TaskActivityObjectKind.EXTERNAL_LINK,
+            object_id=link_id,
+            metadata={
+                "object_label": title,
+                "object_type": "Ссылка",
+                "url": url,
+            },
+        )
+        send_task_board_update(
+            task.board,
+            "unlinked",
+            "external_link",
+            link_id,
+            extra={"task_id": task.id, "link_id": link_id},
+        )
+        return Response(status=status.HTTP_204_NO_CONTENT)
+
     def _comment_payload(self, task, message):
         return {
             "id": message.id,
             "task": task.id,
             "author": EmployeeBriefSerializer(message.author).data,
             "text": message.content,
+            "is_edited": message.is_edited,
+            "edited_at": message.edited_at,
             "created_at": message.created_at,
         }
 
@@ -584,6 +1045,14 @@ class TaskViewSet(viewsets.ModelViewSet):
             author=request.user,
             content=text,
         )
+        create_task_activity(
+            task,
+            request.user,
+            TaskActivityAction.COMMENT_ADDED,
+            object_kind=TaskActivityObjectKind.COMMENT,
+            object_id=message.id,
+            metadata={"comment_text": message.content},
+        )
         notify_task_comment(task, message)
         send_task_board_update(
             task.board,
@@ -599,8 +1068,9 @@ class TaskViewSet(viewsets.ModelViewSet):
 
     @action(
         detail=True,
-        methods=["delete"],
+        methods=["patch", "delete"],
         url_path=r"comments/(?P<comment_id>\d+)",
+        url_name="delete-comment",
     )
     def delete_comment(self, request, pk=None, comment_id=None):
         task = self.get_object()
@@ -623,6 +1093,49 @@ class TaskViewSet(viewsets.ModelViewSet):
                 status=status.HTTP_404_NOT_FOUND,
             )
 
+        if request.method == "PATCH":
+            if message.author_id != request.user.id:
+                return Response(
+                    {"detail": "Редактировать комментарий может только его автор."},
+                    status=status.HTTP_403_FORBIDDEN,
+                )
+
+            text = request.data.get("text", "").strip()
+            if not text:
+                return Response(
+                    {"text": ["Это поле не может быть пустым."]},
+                    status=status.HTTP_400_BAD_REQUEST,
+                )
+
+            previous_text = message.content
+            if text == previous_text:
+                return Response(self._comment_payload(task, message))
+
+            comments_helpers.update_comment(
+                message,
+                text,
+                edited_by=request.user,
+            )
+            create_task_activity(
+                task,
+                request.user,
+                TaskActivityAction.COMMENT_EDITED,
+                object_kind=TaskActivityObjectKind.COMMENT,
+                object_id=message.id,
+                metadata={
+                    "previous_text": previous_text,
+                    "comment_text": message.content,
+                },
+            )
+            send_task_board_update(
+                task.board,
+                "comment_edited",
+                "task",
+                task.id,
+                extra={"comment_id": message.id},
+            )
+            return Response(self._comment_payload(task, message))
+
         if not (
             request.user.is_staff
             or request.user.is_superuser
@@ -633,11 +1146,20 @@ class TaskViewSet(viewsets.ModelViewSet):
                 status=status.HTTP_403_FORBIDDEN,
             )
 
+        comment_text = message.content
         comments_helpers.delete_comment(
             message=message,
             deleted_by=request.user,
             soft_delete=True,
         )
+        create_task_activity(
+            task,
+            request.user,
+            TaskActivityAction.COMMENT_REMOVED,
+            object_kind=TaskActivityObjectKind.COMMENT,
+            object_id=message.id,
+            metadata={"comment_text": comment_text},
+        )
         send_task_board_update(
             task.board,
             "comment_deleted",
diff --git a/backend/communications/comments_helpers.py b/backend/communications/comments_helpers.py
index 4e702b83..e9994b73 100644
--- a/backend/communications/comments_helpers.py
+++ b/backend/communications/comments_helpers.py
@@ -25,7 +25,7 @@ from typing import Optional
 from django.contrib.contenttypes.models import ContentType
 from django.db.models import QuerySet
 
-from .models import Chat, Message, MessageAttachment
+from .models import Chat, Message, MessageAttachment, MessageEditHistory
 
 
 def get_or_create_comments_chat(
@@ -261,7 +261,10 @@ def delete_comment(message: Message, deleted_by, soft_delete: bool = True):
 
 
 def update_comment(
-    message: Message, new_content: str, mark_edited: bool = True
+    message: Message,
+    new_content: str,
+    mark_edited: bool = True,
+    edited_by=None,
 ):
     """
     Обновить текст комментария.
@@ -270,12 +273,23 @@ def update_comment(
         message: Message - комментарий для обновления
         new_content: str - новый текст
         mark_edited: bool - пометить как отредактированный
+        edited_by: User - автор изменения для истории редактирования
 
     Examples:
         >>> update_comment(comment, "Новый текст")
     """
     from django.utils import timezone
 
+    if message.content == new_content:
+        return message
+
+    if mark_edited:
+        MessageEditHistory.objects.create(
+            message=message,
+            previous_content=message.content,
+            edited_by=edited_by,
+        )
+
     message.content = new_content
 
     if mark_edited:
@@ -285,6 +299,8 @@ def update_comment(
     else:
         message.save(update_fields=["content"])
 
+    return message
+
 
 def get_comments_chat_if_exists(obj) -> Optional[Chat]:
     """
diff --git a/backend/documents/admin.py b/backend/documents/admin.py
index 4c5999b0..85a4b76f 100644
--- a/backend/documents/admin.py
+++ b/backend/documents/admin.py
@@ -75,7 +75,12 @@ class DocumentAdmin(admin.ModelAdmin):
     )
     list_filter = ("sent_to_all", "is_regulation", "uploaded_at", "departments")
     search_fields = ("title", "description", "file__name", "file__description")
-    filter_horizontal = ("recipients", "departments")
+    filter_horizontal = (
+        "recipients",
+        "departments",
+        "acknowledgement_recipients",
+        "acknowledgement_departments",
+    )
     actions = ["send_document"]
 
     # Для django-reversion
@@ -112,7 +117,14 @@ class DocumentAdmin(admin.ModelAdmin):
         (
             _("Ознакомление"),
             {
-                "fields": ("recipients_summary", "pending_list"),
+                "fields": (
+                    "acknowledgement_required",
+                    "acknowledgement_for_all",
+                    "acknowledgement_departments",
+                    "acknowledgement_recipients",
+                    "recipients_summary",
+                    "pending_list",
+                ),
             },
         ),
     )
@@ -236,14 +248,15 @@ class DocumentAdmin(admin.ModelAdmin):
 
     def acknowledgement_status(self, obj):
         """Статус ознакомления (N из M)."""
-        recipients = set(self.get_recipients_qs(obj))
+        recipients = set(self.get_acknowledgement_recipients_qs(obj))
         total = len(recipients)
 
         if total == 0:
             return "—"
 
         acked_count = DocumentAcknowledgement.objects.filter(
-            document=obj
+            document=obj,
+            user__in=recipients,
         ).count()
 
         if acked_count == total:
@@ -286,6 +299,12 @@ class DocumentAdmin(admin.ModelAdmin):
 
         return list(recipients_set)
 
+    def get_acknowledgement_recipients_qs(self, obj):
+        """Возвращает сотрудников, обязанных ознакомиться."""
+        from documents.audience import document_acknowledgement_audience
+
+        return list(document_acknowledgement_audience(obj))
+
     def recipients_summary(self, obj):
         """Краткий список получателей."""
         recipients = self.get_recipients_qs(obj)
@@ -303,7 +322,7 @@ class DocumentAdmin(admin.ModelAdmin):
 
     def pending_list(self, obj):
         """Список сотрудников, которые ещё не ознакомились."""
-        recipients = set(self.get_recipients_qs(obj))
+        recipients = set(self.get_acknowledgement_recipients_qs(obj))
         acked_ids = set(
             DocumentAcknowledgement.objects.filter(document=obj).values_list(
                 "user_id", flat=True
diff --git a/backend/documents/audience.py b/backend/documents/audience.py
new file mode 100644
index 00000000..ffdbe188
--- /dev/null
+++ b/backend/documents/audience.py
@@ -0,0 +1,51 @@
+"""Единые правила вычисления аудиторий документа."""
+
+from django.contrib.auth import get_user_model
+from django.db.models import Q, QuerySet
+
+from .models import Document
+
+
+Employee = get_user_model()
+
+
+def document_access_audience(document: Document) -> QuerySet:
+    """Активные сотрудники, которым документ адресован для просмотра."""
+    employees = Employee.objects.filter(is_active=True)
+    if document.sent_to_all:
+        return employees
+
+    return employees.filter(
+        Q(pk__in=document.recipients.values("pk"))
+        | Q(
+            departments_links__department__in=document.departments.all(),
+            departments_links__is_active=True,
+        )
+    ).distinct()
+
+
+def document_acknowledgement_audience(document: Document) -> QuerySet:
+    """Активные сотрудники, обязанные ознакомиться с документом."""
+    access_audience = document_access_audience(document)
+    if not document.acknowledgement_required:
+        return access_audience.none()
+    if document.acknowledgement_for_all:
+        return access_audience
+
+    selected = Employee.objects.filter(is_active=True).filter(
+        Q(pk__in=document.acknowledgement_recipients.values("pk"))
+        | Q(
+            departments_links__department__in=(
+                document.acknowledgement_departments.all()
+            ),
+            departments_links__is_active=True,
+        )
+    )
+    return selected.filter(pk__in=access_audience.values("pk")).distinct()
+
+
+def user_requires_document_acknowledgement(document: Document, user) -> bool:
+    """Нужно ли конкретному сотруднику подтверждать ознакомление."""
+    if not getattr(user, "is_authenticated", False):
+        return False
+    return document_acknowledgement_audience(document).filter(pk=user.pk).exists()
diff --git a/backend/documents/migrations/0017_document_acknowledgement_audience.py b/backend/documents/migrations/0017_document_acknowledgement_audience.py
new file mode 100644
index 00000000..ee7102e9
--- /dev/null
+++ b/backend/documents/migrations/0017_document_acknowledgement_audience.py
@@ -0,0 +1,57 @@
+from django.conf import settings
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("documents", "0016_document_is_regulation"),
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name="document",
+            name="acknowledgement_required",
+            field=models.BooleanField(
+                default=True,
+                help_text="Если включено — сотрудники должны подтвердить ознакомление",
+                verbose_name="Требуется ознакомление",
+            ),
+        ),
+        migrations.AddField(
+            model_name="document",
+            name="acknowledgement_for_all",
+            field=models.BooleanField(
+                default=True,
+                help_text=(
+                    "Если включено — ознакомиться должны все сотрудники, "
+                    "которым доступен документ"
+                ),
+                verbose_name="Ознакомление для всех с доступом",
+            ),
+        ),
+        migrations.AddField(
+            model_name="document",
+            name="acknowledgement_departments",
+            field=models.ManyToManyField(
+                blank=True,
+                help_text=(
+                    "Сотрудники выбранных отделов должны ознакомиться с документом"
+                ),
+                related_name="documents_requiring_acknowledgement",
+                to="employees.department",
+                verbose_name="Отделы для ознакомления",
+            ),
+        ),
+        migrations.AddField(
+            model_name="document",
+            name="acknowledgement_recipients",
+            field=models.ManyToManyField(
+                blank=True,
+                help_text="Выбранные сотрудники должны ознакомиться с документом",
+                related_name="documents_requiring_acknowledgement",
+                to=settings.AUTH_USER_MODEL,
+                verbose_name="Сотрудники для ознакомления",
+            ),
+        ),
+    ]
diff --git a/backend/documents/models.py b/backend/documents/models.py
index e2418ad2..6c97af49 100644
--- a/backend/documents/models.py
+++ b/backend/documents/models.py
@@ -97,12 +97,21 @@ class Document(models.Model):
     # Требование ознакомления
     acknowledgement_required = models.BooleanField(
         _("Требуется ознакомление"),
-        default=False,
+        default=True,
         help_text=_(
             "Если включено — сотрудники должны подтвердить ознакомление"
         ),
     )
 
+    acknowledgement_for_all = models.BooleanField(
+        _("Ознакомление для всех с доступом"),
+        default=True,
+        help_text=_(
+            "Если включено — ознакомиться должны все сотрудники, "
+            "которым доступен документ"
+        ),
+    )
+
     is_regulation = models.BooleanField(
         _("Регламент"),
         default=False,
@@ -128,6 +137,24 @@ class Document(models.Model):
         ),
         related_name="document_recipients",
     )
+    acknowledgement_departments = models.ManyToManyField(
+        "employees.Department",
+        verbose_name=_("Отделы для ознакомления"),
+        blank=True,
+        related_name="documents_requiring_acknowledgement",
+        help_text=_(
+            "Сотрудники выбранных отделов должны ознакомиться с документом"
+        ),
+    )
+    acknowledgement_recipients = models.ManyToManyField(
+        User,
+        verbose_name=_("Сотрудники для ознакомления"),
+        blank=True,
+        related_name="documents_requiring_acknowledgement",
+        help_text=_(
+            "Выбранные сотрудники должны ознакомиться с документом"
+        ),
+    )
 
     # Связанные документы
     related_documents = models.ManyToManyField(
diff --git a/backend/documents/notifications/handlers.py b/backend/documents/notifications/handlers.py
index d9f72d22..dbce0346 100644
--- a/backend/documents/notifications/handlers.py
+++ b/backend/documents/notifications/handlers.py
@@ -27,9 +27,19 @@ logger = logging.getLogger(__name__)
 Employee = get_user_model()
 
 
-def _document_ready_payload(document, uploader_name):
+def _document_ready_payload(document, uploader_name, recipient=None):
     """Собирает единый текст и данные уведомления о новом документе."""
-    acknowledgement_required = bool(document.acknowledgement_required)
+    if recipient is None:
+        acknowledgement_required = bool(
+            document.acknowledgement_required
+            and document.acknowledgement_for_all
+        )
+    else:
+        from documents.audience import user_requires_document_acknowledgement
+
+        acknowledgement_required = user_requires_document_acknowledgement(
+            document, recipient
+        )
     return {
         "description": MessageTemplates.document_ready(
             uploader_name,
@@ -64,7 +74,7 @@ def notify_document_ready(document, recipient):
     )
 
     uploader_name = get_uploader_name(document.uploaded_by)
-    payload = _document_ready_payload(document, uploader_name)
+    payload = _document_ready_payload(document, uploader_name, recipient)
 
     notify.send(
         sender=document.uploaded_by,
@@ -101,10 +111,11 @@ def notify_all_employees(document):
     # Создаём уведомления
     created_count = 0
     uploader_name = get_uploader_name(document.uploaded_by)
-    payload = _document_ready_payload(document, uploader_name)
-
     for employee in active_employees:
         try:
+            payload = _document_ready_payload(
+                document, uploader_name, employee
+            )
             notify.send(
                 sender=document.uploaded_by,
                 recipient=employee,
@@ -169,11 +180,10 @@ def notify_specific_users(document, user_ids):
     # Уведомляем получателей
     created_count = 0
     uploader_name = get_uploader_name(document.uploaded_by)
-    payload = _document_ready_payload(document, uploader_name)
-
     for user_id in user_ids:
         try:
             user = Employee.objects.get(id=user_id)
+            payload = _document_ready_payload(document, uploader_name, user)
             logger.debug(f"[handlers] Creating notification for user={user_id}")
             notify.send(
                 sender=document.uploaded_by,
@@ -254,10 +264,11 @@ def notify_department_employees(document, department_ids):
     # Создаём уведомления
     created_count = 0
     uploader_name = get_uploader_name(document.uploaded_by)
-    payload = _document_ready_payload(document, uploader_name)
-
     for employee in all_employees:
         try:
+            payload = _document_ready_payload(
+                document, uploader_name, employee
+            )
             notify.send(
                 sender=document.uploaded_by,
                 recipient=employee,
@@ -278,6 +289,22 @@ def notify_department_employees(document, department_ids):
     logger.info(f"[handlers] Created {created_count} notifications")
 
 
+def notify_document_audience(document):
+    """Уведомляет аудиторию доступа после полной настройки документа."""
+    if document.sent_to_all:
+        notify_all_employees(document)
+        return
+
+    from documents.audience import document_access_audience
+
+    recipient_ids = set(
+        document_access_audience(document).values_list("pk", flat=True)
+    )
+    if document.uploaded_by_id:
+        recipient_ids.discard(document.uploaded_by_id)
+    notify_specific_users(document, recipient_ids)
+
+
 def notify_all_acknowledged(document, total_recipients, acknowledged_count):
     """
     Уведомляет загрузившего о том, что все ознакомились с документом.
diff --git a/backend/documents/notifications/signals.py b/backend/documents/notifications/signals.py
index 5ccc570f..fabd59f3 100644
--- a/backend/documents/notifications/signals.py
+++ b/backend/documents/notifications/signals.py
@@ -41,6 +41,9 @@ def create_document_notification(sender, instance, created, **kwargs):
         f"created={created} sent_to_all={instance.sent_to_all}"
     )
 
+    if getattr(instance, "_suppress_document_notifications", False):
+        return
+
     if not created:
         return
 
@@ -73,6 +76,9 @@ def notify_specific_recipients(sender, instance, action, pk_set, **kwargs):
         f"action={action} pk_set={pk_set} sent_to_all={instance.sent_to_all}"
     )
 
+    if getattr(instance, "_suppress_document_notifications", False):
+        return
+
     if action != "post_add":
         logger.info(f"[signals] Skipping (action={action} != 'post_add')")
         return
@@ -101,6 +107,9 @@ def notify_department_employees_signal(
         f"id={instance.pk} action={action} pk_set={pk_set}"
     )
 
+    if getattr(instance, "_suppress_document_notifications", False):
+        return
+
     if action != "post_add":
         logger.info(f"[signals] Skipping (action={action} != 'post_add')")
         return
@@ -134,23 +143,15 @@ def check_all_acknowledged(sender, instance, created, **kwargs):
         )
         return
 
-    # Определяем общее количество получателей
-    if document.sent_to_all:
-        total_recipients = Employee.objects.filter(is_active=True).count()
-    else:
-        # Считаем получателей из recipients + departments
-        recipients_count = document.recipients.count()
+    from documents.audience import document_acknowledgement_audience
 
-        # Добавляем сотрудников из отделов
-        department_employees = set()
-        for department in document.departments.all():
-            department_employees.update(department.active_employees)
-
-        # Исключаем дубликаты с recipients
-        total_recipients = recipients_count + len(department_employees)
+    acknowledgement_audience = document_acknowledgement_audience(document)
+    total_recipients = acknowledgement_audience.count()
 
     # Проверяем количество ознакомившихся
-    acknowledged_count = document.acknowledgements.count()
+    acknowledged_count = document.acknowledgements.filter(
+        user__in=acknowledgement_audience
+    ).count()
 
     # Если все ознакомились - уведомляем загрузившего
     if (
diff --git a/backend/documents/rules.py b/backend/documents/rules.py
index b310e7a5..fd55bca6 100644
--- a/backend/documents/rules.py
+++ b/backend/documents/rules.py
@@ -104,6 +104,16 @@ def has_acknowledged_document(user, document):
     ).exists()
 
 
+@rules.predicate
+def requires_document_acknowledgement(user, document):
+    """Пользователь входит в отдельную аудиторию ознакомления."""
+    if document is None:
+        return False
+    from documents.audience import user_requires_document_acknowledgement
+
+    return user_requires_document_acknowledgement(document, user)
+
+
 # -----------------------------------------------------------------------------
 # ПРАВИЛА (rules)
 # -----------------------------------------------------------------------------
@@ -133,7 +143,10 @@ rules.add_rule(
 )
 
 # Отметка об ознакомлении (только те, у кого есть доступ)
-rules.add_rule("documents.acknowledge_document", has_document_access)
+rules.add_rule(
+    "documents.acknowledge_document",
+    has_document_access & requires_document_acknowledgement,
+)
 
 # Просмотр списка ознакомившихся (все, у кого есть доступ к документу)
 rules.add_rule(
diff --git a/backend/employees/ldap/utils/image_utils.py b/backend/employees/ldap/utils/image_utils.py
index 4d9d367f..1917136b 100644
--- a/backend/employees/ldap/utils/image_utils.py
+++ b/backend/employees/ldap/utils/image_utils.py
@@ -12,6 +12,58 @@ except ImportError:
     Image = None  # type: ignore
 
 
+def _encode_jpeg(image, quality: int) -> bytes:
+    """Кодирует JPEG, обходя ограничения буфера libjpeg для сложных фото."""
+    options = {
+        "format": "JPEG",
+        "quality": quality,
+        "subsampling": 0,
+    }
+
+    buffer = io.BytesIO()
+    try:
+        image.save(
+            buffer,
+            optimize=True,
+            progressive=True,
+            **options,
+        )
+    except OSError:
+        # Некоторые сборки libjpeg не могут оптимизировать высокоэнтропийное
+        # изображение через BytesIO. Обычный JPEG остаётся совместимым с AD.
+        buffer = io.BytesIO()
+        image.save(
+            buffer,
+            optimize=False,
+            progressive=False,
+            **options,
+        )
+    return buffer.getvalue()
+
+
+def _best_jpeg_within_limit(
+    image,
+    *,
+    min_quality: int,
+    max_quality: int,
+    max_bytes: int,
+) -> bytes | None:
+    """Возвращает JPEG максимального качества в заданном лимите."""
+    best = None
+    low, high = min_quality, max_quality
+
+    while low <= high:
+        quality = (low + high) // 2
+        encoded = _encode_jpeg(image, quality)
+        if len(encoded) <= max_bytes:
+            best = encoded
+            low = quality + 1
+        else:
+            high = quality - 1
+
+    return best
+
+
 def normalize_avatar_to_jpeg(
     data: bytes, *, size_px: int = 384, max_kb: int = 100
 ) -> bytes:
@@ -42,6 +94,10 @@ def normalize_avatar_to_jpeg(
     """
     if not data:
         raise ValueError("avatar: пустые данные")
+    if size_px <= 0:
+        raise ValueError("avatar: размер изображения должен быть положительным")
+    if max_kb <= 0:
+        raise ValueError("avatar: лимит размера должен быть положительным")
     if Image is None:
         raise RuntimeError(
             "Pillow не установлен. Установите 'Pillow' для обработки аватаров."
@@ -86,46 +142,46 @@ def normalize_avatar_to_jpeg(
         # вместо resize, который растягивает изображение
         img.thumbnail((size_px, size_px), Image.Resampling.LANCZOS)
 
-        # Бинарный поиск по качеству для соблюдения max_kb
-        # КАЧЕСТВО: Повышен минимум до 75, используется progressive и 4:4:4
-        lo, hi = 75, 98
-        best = None
-        while lo <= hi:
-            mid = (lo + hi) // 2
-            buf = io.BytesIO()
-            # МАКСИМАЛЬНОЕ КАЧЕСТВО:
-            # - progressive: лучше сжатие, плавная загрузка
-            # - subsampling=0: 4:4:4 (без потери цветности, лучше для лиц)
-            # - optimize: оптимизация таблиц Хаффмана
-            img.save(
-                buf,
-                format="JPEG",
-                quality=mid,
-                optimize=True,
-                progressive=True,
-                subsampling=0,  # 4:4:4 - без потери цветности
-            )
-            kb = len(buf.getvalue()) // 1024
-            if kb <= max_kb:
-                best = buf.getvalue()
-                lo = mid + 1
-            else:
-                hi = mid - 1
+        max_bytes = max_kb * 1024
+        working = img
 
-        if best is None:
-            # минимально возможное (с теми же настройками качества)
-            buf = io.BytesIO()
-            img.save(
-                buf,
-                format="JPEG",
-                quality=75,
-                optimize=True,
-                progressive=True,
-                subsampling=0,
+        # Сначала сохраняем высокое качество. Если сложное изображение не
+        # помещается, уменьшаем разрешение, не нарушая жёсткий лимит LDAP.
+        while True:
+            best = _best_jpeg_within_limit(
+                working,
+                min_quality=75,
+                max_quality=98,
+                max_bytes=max_bytes,
             )
-            best = buf.getvalue()
+            if best is not None:
+                return best
 
-        return best
+            if max(working.size) <= 64:
+                break
+
+            next_size = tuple(max(1, int(side * 0.85)) for side in working.size)
+            working = working.resize(next_size, Image.Resampling.LANCZOS)
+
+        # Аварийный диапазон качества нужен только для нетипично маленького
+        # лимита или высокоэнтропийного изображения.
+        while True:
+            best = _best_jpeg_within_limit(
+                working,
+                min_quality=20,
+                max_quality=74,
+                max_bytes=max_bytes,
+            )
+            if best is not None:
+                return best
+
+            if max(working.size) <= 1:
+                raise RuntimeError(
+                    "avatar: невозможно уложить JPEG в заданный лимит"
+                )
+
+            next_size = tuple(max(1, int(side * 0.75)) for side in working.size)
+            working = working.resize(next_size, Image.Resampling.LANCZOS)
     except Exception as exc:  # pragma: no cover
         raise RuntimeError(f"avatar: ошибка нормализации: {exc}") from exc
 
diff --git a/backend/eusrr_backend/settings.py b/backend/eusrr_backend/settings.py
index 4cb1d656..398134ae 100644
--- a/backend/eusrr_backend/settings.py
+++ b/backend/eusrr_backend/settings.py
@@ -6,8 +6,6 @@ from pathlib import Path
 from celery.schedules import crontab
 from dotenv import load_dotenv
 
-from dotenv import load_dotenv
-
 load_dotenv()
 
 BASE_DIR = Path(__file__).resolve().parent.parent
@@ -243,11 +241,11 @@ MEDIA_URL = "/media/"
 #   ├── chat_attachments/   ← Вложения в чате
 #   └── temp/              ← Временные файлы
 
-# Лимиты загрузки файлов
-# По умолчанию Django ограничивает загрузку до 2.5MB
-# Увеличиваем до 10MB для аватаров и документов
-DATA_UPLOAD_MAX_MEMORY_SIZE = 10 * 1024 * 1024  # 10 MB
-FILE_UPLOAD_MAX_MEMORY_SIZE = 10 * 1024 * 1024  # 10 MB
+# Параметры обработки загрузок
+# Ограничивает только нефайловые данные запроса. Размер файлов не ограничен.
+DATA_UPLOAD_MAX_MEMORY_SIZE = 10 * 1024 * 1024
+# Крупные и небольшие файлы сразу пишутся во временное хранилище, а не в RAM.
+FILE_UPLOAD_MAX_MEMORY_SIZE = 0
 
 # -----------------------------------------------------------------------------
 # ЛОГИРОВАНИЕ
diff --git a/backend/feed/models.py b/backend/feed/models.py
index 08d457bb..7588569b 100644
--- a/backend/feed/models.py
+++ b/backend/feed/models.py
@@ -17,17 +17,6 @@ from .constants import (
 Employee = get_user_model()
 
 
-# --- helpers: валидаторы размера файлов ---
-def validate_file_size(max_mb: int):
-    max_bytes = max_mb * 1024 * 1024
-
-    def _v(f):
-        if f and getattr(f, "size", 0) > max_bytes:
-            raise ValidationError(f"Файл превышает {max_mb} MB.")
-
-    return _v
-
-
 IMAGE_EXTS = ["jpg", "jpeg", "png", "gif", "webp"]
 FILE_EXTS = [
     "pdf",
@@ -49,12 +38,13 @@ FILE_EXTS = [
 
 @deconstructible
 class FileSizeValidator:
+    """Оставлен как no-op для совместимости со старыми миграциями."""
+
     def __init__(self, max_mb: int):
         self.max_mb = int(max_mb)
 
     def __call__(self, f):
-        if f and getattr(f, "size", 0) > self.max_mb * 1024 * 1024:
-            raise ValidationError(f"Файл превышает {self.max_mb} MB.")
+        return None
 
     def __eq__(self, other):
         return (
diff --git a/backend/procurement/activity.py b/backend/procurement/activity.py
new file mode 100644
index 00000000..d4c6fc65
--- /dev/null
+++ b/backend/procurement/activity.py
@@ -0,0 +1,21 @@
+from .models import ProcurementRequestActivity
+
+
+def create_procurement_activity(
+    procurement_request,
+    actor,
+    action,
+    *,
+    object_kind="",
+    object_id=None,
+    metadata=None,
+):
+    """Write one immutable entry to the procurement request audit trail."""
+    return ProcurementRequestActivity.objects.create(
+        request=procurement_request,
+        actor=actor if getattr(actor, "is_authenticated", False) else None,
+        action=action,
+        object_kind=object_kind or "",
+        object_id=object_id,
+        metadata=metadata or {},
+    )
diff --git a/backend/procurement/apps.py b/backend/procurement/apps.py
index ce8c8a54..193b7996 100644
--- a/backend/procurement/apps.py
+++ b/backend/procurement/apps.py
@@ -9,5 +9,6 @@ class ProcurementConfig(AppConfig):
     def ready(self):
         """Подключение сигналов при загрузке приложения."""
         import procurement.notifications.signals  # noqa: F401
+        import procurement.signals  # noqa: F401
         # django-rules: регистрация предикатов и правил доступа
         import procurement.rules  # noqa: F401
diff --git a/backend/procurement/migrations/0015_procurementitemattachment.py b/backend/procurement/migrations/0015_procurementitemattachment.py
new file mode 100644
index 00000000..b5f287d9
--- /dev/null
+++ b/backend/procurement/migrations/0015_procurementitemattachment.py
@@ -0,0 +1,35 @@
+# Generated by Django 5.2.4 on 2026-07-17 07:34
+
+import django.db.models.deletion
+import procurement.models
+from django.conf import settings
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('procurement', '0014_procurementsettings'),
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='ProcurementItemAttachment',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('file', models.FileField(max_length=500, upload_to=procurement.models.procurement_item_attachment_upload_to, verbose_name='Файл')),
+                ('file_name', models.TextField(verbose_name='Имя файла')),
+                ('file_size', models.BigIntegerField(default=0, verbose_name='Размер файла')),
+                ('mime_type', models.CharField(blank=True, max_length=255, verbose_name='MIME-тип')),
+                ('created_at', models.DateTimeField(auto_now_add=True, verbose_name='Создано')),
+                ('item', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='attachments', to='procurement.procurementitem', verbose_name='Позиция')),
+                ('uploaded_by', models.ForeignKey(on_delete=django.db.models.deletion.PROTECT, related_name='procurement_item_attachments', to=settings.AUTH_USER_MODEL, verbose_name='Загрузил')),
+            ],
+            options={
+                'verbose_name': 'Вложение позиции закупки',
+                'verbose_name_plural': 'Вложения позиций закупки',
+                'ordering': ['created_at', 'id'],
+            },
+        ),
+    ]
diff --git a/backend/procurement/migrations/0016_procurementrequestactivity.py b/backend/procurement/migrations/0016_procurementrequestactivity.py
new file mode 100644
index 00000000..03aa082c
--- /dev/null
+++ b/backend/procurement/migrations/0016_procurementrequestactivity.py
@@ -0,0 +1,91 @@
+# Generated by Django 5.2.4 on 2026-07-17 10:53
+
+import django.db.models.deletion
+from django.conf import settings
+from django.db import migrations, models
+
+
+def backfill_procurement_activity(apps, schema_editor):
+    ProcurementRequest = apps.get_model("procurement", "ProcurementRequest")
+    Activity = apps.get_model("procurement", "ProcurementRequestActivity")
+
+    activities = []
+    activity_times = []
+    for procurement_request in ProcurementRequest.objects.iterator(chunk_size=500):
+        entries = [
+            (
+                "created",
+                procurement_request.created_at,
+                procurement_request.requestor_id,
+            ),
+            (
+                "submitted",
+                procurement_request.submitted_at,
+                procurement_request.requestor_id,
+            ),
+            (
+                "started",
+                procurement_request.started_at,
+                procurement_request.executor_id,
+            ),
+            (
+                "completed",
+                procurement_request.completed_at,
+                procurement_request.executor_id,
+            ),
+        ]
+        for action, created_at, actor_id in entries:
+            if created_at is None:
+                continue
+            activities.append(
+                Activity(
+                    request_id=procurement_request.pk,
+                    actor_id=actor_id,
+                    action=action,
+                    object_kind="request",
+                    object_id=procurement_request.pk,
+                    metadata={"backfilled": True},
+                )
+            )
+            activity_times.append(created_at)
+
+    if not activities:
+        return
+    Activity.objects.bulk_create(activities, batch_size=500)
+    for activity, created_at in zip(activities, activity_times):
+        activity.created_at = created_at
+    Activity.objects.bulk_update(activities, ["created_at"], batch_size=500)
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('procurement', '0015_procurementitemattachment'),
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='ProcurementRequestActivity',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('action', models.CharField(choices=[('created', 'Создал заявку'), ('updated', 'Изменил заявку'), ('submitted', 'Отправил на согласование'), ('stage_approved', 'Согласовал этап'), ('stage_rejected', 'Отклонил этап согласования'), ('approved', 'Заявка согласована'), ('started', 'Взял заявку в работу'), ('executor_reassigned', 'Сменил исполнителя'), ('completed', 'Завершил заявку'), ('rejected', 'Отклонил заявку'), ('cancelled', 'Отменил заявку'), ('item_updated', 'Изменил исполнение позиции'), ('all_items_received', 'Отметил все позиции полученными'), ('attachment_added', 'Добавил файл'), ('attachment_removed', 'Удалил файл'), ('comment_added', 'Добавил комментарий'), ('comment_removed', 'Удалил комментарий'), ('arrival_notified', 'Уведомил о поступлении')], max_length=32, verbose_name='Действие')),
+                ('object_kind', models.CharField(blank=True, choices=[('request', 'Заявка'), ('approval', 'Согласование'), ('item', 'Позиция'), ('attachment', 'Файл'), ('comment', 'Комментарий')], max_length=32, verbose_name='Тип объекта')),
+                ('object_id', models.PositiveBigIntegerField(blank=True, null=True, verbose_name='ID объекта')),
+                ('metadata', models.JSONField(blank=True, default=dict, verbose_name='Метаданные')),
+                ('created_at', models.DateTimeField(auto_now_add=True, verbose_name='Создано')),
+                ('actor', models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.SET_NULL, related_name='procurement_activities', to=settings.AUTH_USER_MODEL, verbose_name='Инициатор')),
+                ('request', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='activities', to='procurement.procurementrequest', verbose_name='Заявка')),
+            ],
+            options={
+                'verbose_name': 'История заявки на закупку',
+                'verbose_name_plural': 'История заявок на закупку',
+                'ordering': ['-created_at', '-id'],
+                'indexes': [models.Index(fields=['request', '-created_at'], name='procurement_request_4b22f4_idx')],
+            },
+        ),
+        migrations.RunPython(
+            backfill_procurement_activity,
+            reverse_code=migrations.RunPython.noop,
+        ),
+    ]
diff --git a/backend/procurement/models.py b/backend/procurement/models.py
index 58285824..be2713f8 100644
--- a/backend/procurement/models.py
+++ b/backend/procurement/models.py
@@ -308,6 +308,77 @@ class ProcurementRequest(models.Model):
         return new_status
 
 
+class ProcurementActivityObjectKind(models.TextChoices):
+    REQUEST = "request", "Заявка"
+    APPROVAL = "approval", "Согласование"
+    ITEM = "item", "Позиция"
+    ATTACHMENT = "attachment", "Файл"
+    COMMENT = "comment", "Комментарий"
+
+
+class ProcurementActivityAction(models.TextChoices):
+    CREATED = "created", "Создал заявку"
+    UPDATED = "updated", "Изменил заявку"
+    SUBMITTED = "submitted", "Отправил на согласование"
+    STAGE_APPROVED = "stage_approved", "Согласовал этап"
+    STAGE_REJECTED = "stage_rejected", "Отклонил этап согласования"
+    APPROVED = "approved", "Заявка согласована"
+    STARTED = "started", "Взял заявку в работу"
+    EXECUTOR_REASSIGNED = "executor_reassigned", "Сменил исполнителя"
+    COMPLETED = "completed", "Завершил заявку"
+    REJECTED = "rejected", "Отклонил заявку"
+    CANCELLED = "cancelled", "Отменил заявку"
+    ITEM_UPDATED = "item_updated", "Изменил исполнение позиции"
+    ALL_ITEMS_RECEIVED = "all_items_received", "Отметил все позиции полученными"
+    ATTACHMENT_ADDED = "attachment_added", "Добавил файл"
+    ATTACHMENT_REMOVED = "attachment_removed", "Удалил файл"
+    COMMENT_ADDED = "comment_added", "Добавил комментарий"
+    COMMENT_REMOVED = "comment_removed", "Удалил комментарий"
+    ARRIVAL_NOTIFIED = "arrival_notified", "Уведомил о поступлении"
+
+
+class ProcurementRequestActivity(models.Model):
+    request = models.ForeignKey(
+        ProcurementRequest,
+        on_delete=models.CASCADE,
+        related_name="activities",
+        verbose_name="Заявка",
+    )
+    actor = models.ForeignKey(
+        User,
+        on_delete=models.SET_NULL,
+        null=True,
+        blank=True,
+        related_name="procurement_activities",
+        verbose_name="Инициатор",
+    )
+    action = models.CharField(
+        "Действие",
+        max_length=32,
+        choices=ProcurementActivityAction.choices,
+    )
+    object_kind = models.CharField(
+        "Тип объекта",
+        max_length=32,
+        choices=ProcurementActivityObjectKind.choices,
+        blank=True,
+    )
+    object_id = models.PositiveBigIntegerField("ID объекта", null=True, blank=True)
+    metadata = models.JSONField("Метаданные", default=dict, blank=True)
+    created_at = models.DateTimeField("Создано", auto_now_add=True)
+
+    class Meta:
+        verbose_name = "История заявки на закупку"
+        verbose_name_plural = "История заявок на закупку"
+        ordering = ["-created_at", "-id"]
+        indexes = [
+            models.Index(fields=["request", "-created_at"]),
+        ]
+
+    def __str__(self):
+        return f"{self.request} - {self.action}"
+
+
 class ProcurementRequestView(models.Model):
     """Персональная отметка просмотра заявки пользователем."""
 
@@ -513,6 +584,7 @@ class ProcurementItem(models.Model):
                 {"received_quantity": "Не может быть больше количества позиции"}
             )
 
+
     @staticmethod
     def _mark_update_field(update_fields, field):
         if update_fields is not None:
@@ -589,6 +661,48 @@ class ProcurementItem(models.Model):
         return result
 
 
+def procurement_item_attachment_upload_to(instance, filename):
+    """Keep item attachments grouped while discarding client-side paths."""
+    from pathlib import Path
+
+    safe_name = Path(filename).name
+    return f"procurement/item_attachments/{instance.item_id}/{safe_name}"
+
+
+class ProcurementItemAttachment(models.Model):
+    """Файл, прикреплённый к отдельной позиции заявки."""
+
+    item = models.ForeignKey(
+        ProcurementItem,
+        on_delete=models.CASCADE,
+        related_name="attachments",
+        verbose_name="Позиция",
+    )
+    file = models.FileField(
+        "Файл",
+        upload_to=procurement_item_attachment_upload_to,
+        max_length=500,
+    )
+    file_name = models.TextField("Имя файла")
+    file_size = models.BigIntegerField("Размер файла", default=0)
+    mime_type = models.CharField("MIME-тип", max_length=255, blank=True)
+    uploaded_by = models.ForeignKey(
+        User,
+        on_delete=models.PROTECT,
+        related_name="procurement_item_attachments",
+        verbose_name="Загрузил",
+    )
+    created_at = models.DateTimeField("Создано", auto_now_add=True)
+
+    class Meta:
+        verbose_name = "Вложение позиции закупки"
+        verbose_name_plural = "Вложения позиций закупки"
+        ordering = ["created_at", "id"]
+
+    def __str__(self):
+        return self.file_name
+
+
 class ApprovalRoute(models.Model):
     """Правило получения согласующего для этапа с заданным приоритетом."""
 
diff --git a/backend/procurement/signals.py b/backend/procurement/signals.py
new file mode 100644
index 00000000..16b5bf3c
--- /dev/null
+++ b/backend/procurement/signals.py
@@ -0,0 +1,98 @@
+from django.db import transaction
+from django.db.models.signals import post_delete, post_save
+from django.dispatch import receiver
+
+from .activity import create_procurement_activity
+from .constants import ApprovalStatus, ProcurementStatus
+from .models import (
+    Approval,
+    ProcurementActivityAction,
+    ProcurementActivityObjectKind,
+    ProcurementItemAttachment,
+    ProcurementRequest,
+)
+
+
+REQUEST_STATUS_ACTIONS = {
+    ProcurementStatus.PENDING: ProcurementActivityAction.SUBMITTED,
+    ProcurementStatus.APPROVED: ProcurementActivityAction.APPROVED,
+    ProcurementStatus.WAITING: ProcurementActivityAction.APPROVED,
+    ProcurementStatus.IN_PROGRESS: ProcurementActivityAction.STARTED,
+    ProcurementStatus.COMPLETED: ProcurementActivityAction.COMPLETED,
+    ProcurementStatus.REJECTED: ProcurementActivityAction.REJECTED,
+    ProcurementStatus.CANCELLED: ProcurementActivityAction.CANCELLED,
+}
+
+
+@receiver(post_save, sender=ProcurementRequest)
+def record_procurement_request_activity(sender, instance, created, **kwargs):
+    actor = getattr(instance, "_notification_actor", None)
+    if created:
+        create_procurement_activity(
+            instance,
+            actor or instance.requestor,
+            ProcurementActivityAction.CREATED,
+            object_kind=ProcurementActivityObjectKind.REQUEST,
+            object_id=instance.pk,
+            metadata={"title": instance.title},
+        )
+        return
+
+    old_status = getattr(instance, "_original_status", instance.status)
+    if old_status == instance.status:
+        return
+
+    action = REQUEST_STATUS_ACTIONS.get(instance.status)
+    if action is None:
+        return
+    create_procurement_activity(
+        instance,
+        actor,
+        action,
+        object_kind=ProcurementActivityObjectKind.REQUEST,
+        object_id=instance.pk,
+        metadata={
+            "old_status": old_status,
+            "new_status": instance.status,
+            "reason": getattr(instance, "cancellation_reason", ""),
+        },
+    )
+
+
+@receiver(post_save, sender=Approval)
+def record_procurement_approval_activity(sender, instance, created, **kwargs):
+    if created:
+        return
+    old_status = getattr(instance, "_original_approval_status", instance.status)
+    if old_status == instance.status:
+        return
+    action = {
+        ApprovalStatus.APPROVED: ProcurementActivityAction.STAGE_APPROVED,
+        ApprovalStatus.REJECTED: ProcurementActivityAction.STAGE_REJECTED,
+    }.get(instance.status)
+    if action is None:
+        return
+    create_procurement_activity(
+        instance.request,
+        instance.approver,
+        action,
+        object_kind=ProcurementActivityObjectKind.APPROVAL,
+        object_id=instance.pk,
+        metadata={
+            "step_name": instance.step_name,
+            "priority": instance.priority,
+            "comment": instance.comment,
+        },
+    )
+
+
+@receiver(post_delete, sender=ProcurementItemAttachment)
+def delete_procurement_item_attachment_file(sender, instance, **kwargs):
+    if not instance.file or not instance.file.name:
+        return
+
+    storage = instance.file.storage
+    name = instance.file.name
+    transaction.on_commit(
+        lambda: storage.delete(name) if storage.exists(name) else None
+    )
diff --git a/backend/requests_app/constants.py b/backend/requests_app/constants.py
index 4ac697a5..e11d0077 100644
--- a/backend/requests_app/constants.py
+++ b/backend/requests_app/constants.py
@@ -2,7 +2,6 @@
 from django.conf import settings
 
 
-MAX_ATTACHMENT_SIZE = 10 * 1024 * 1024  # 10 MB
 SAFE_EXTENSIONS = ["pdf", "jpg", "jpeg", "png"]
 _ALLOWED_EXTS_DOTTED = {
     e if str(e).startswith(".") else f".{e}"
diff --git a/backend/requests_app/migrations/0013_alter_request_attachment.py b/backend/requests_app/migrations/0013_alter_request_attachment.py
new file mode 100644
index 00000000..fb90105c
--- /dev/null
+++ b/backend/requests_app/migrations/0013_alter_request_attachment.py
@@ -0,0 +1,20 @@
+# Generated by Django 5.2.4 on 2026-07-16 15:09
+
+import django.core.validators
+import requests_app.models
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('requests_app', '0012_add_maternity_request_type'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='request',
+            name='attachment',
+            field=models.FileField(blank=True, null=True, upload_to='requests/attachments/%Y/%m/', validators=[django.core.validators.FileExtensionValidator(allowed_extensions=['pdf', 'jpg', 'jpeg', 'png']), requests_app.models.attachment_mime_validator], verbose_name='Вложение'),
+        ),
+    ]
diff --git a/backend/requests_app/models.py b/backend/requests_app/models.py
index 2edffac7..9fd7f43d 100644
--- a/backend/requests_app/models.py
+++ b/backend/requests_app/models.py
@@ -10,7 +10,6 @@ from django.utils import timezone
 from django.utils.translation import gettext_lazy as _
 
 from .constants import (
-    MAX_ATTACHMENT_SIZE,
     SAFE_EXTENSIONS,
     SAFE_MIME_TYPES,
 )
@@ -20,12 +19,8 @@ logger = logging.getLogger(__name__)
 
 
 def attachment_file_size(value):
-    """Ограничение размера вложения (10 МБ)."""
-    if value and getattr(value, "size", 0) > MAX_ATTACHMENT_SIZE:
-        mb = MAX_ATTACHMENT_SIZE // (1024 * 1024)
-        raise ValidationError(
-            _("Размер файла не должен превышать %(mb)s МБ."), params={"mb": mb}
-        )
+    """Оставлено для совместимости со старыми миграциями."""
+    return None
 
 
 def attachment_mime_validator(value):
@@ -142,7 +137,6 @@ class Request(models.Model):
         null=True,
         validators=[
             FileExtensionValidator(allowed_extensions=SAFE_EXTENSIONS),
-            attachment_file_size,
             attachment_mime_validator,
         ],
     )
diff --git a/backend/static/js/components/avatarCropperHandler.js b/backend/static/js/components/avatarCropperHandler.js
index 92546c63..32252e81 100644
--- a/backend/static/js/components/avatarCropperHandler.js
+++ b/backend/static/js/components/avatarCropperHandler.js
@@ -64,7 +64,6 @@ const DEFAULT_CONFIG = {
     cancelButton: 'Отмена',
     errorTooSmall: 'Изображение слишком маленькое. Минимальный размер: ',
     errorInvalidFormat: 'Неподдерживаемый формат. Используйте JPG, PNG или GIF.',
-    errorFileSize: 'Файл слишком большой. Максимум 10 МБ.',
   }
 };
 
@@ -230,13 +229,6 @@ export class AvatarCropper {
       return;
     }
     
-    // Валидация размера (10 МБ)
-    if (file.size > 10 * 1024 * 1024) {
-      alert(this.config.texts.errorFileSize);
-      event.target.value = '';
-      return;
-    }
-    
     this.currentFile = file;
     
     // Проверяем размер изображения
diff --git a/backend/tasks/access.py b/backend/tasks/access.py
index 3dd5baf4..c1a181b9 100644
--- a/backend/tasks/access.py
+++ b/backend/tasks/access.py
@@ -8,7 +8,7 @@ from requests_app.models import Request as EmployeeRequest
 from schedule.models import Event
 from scheduling.services import user_can_view_calendar
 
-from .models import TaskBoard
+from .models import TaskBoard, TaskBoardAccessScope
 
 
 def get_user_department_ids(user) -> list[int]:
@@ -39,10 +39,15 @@ def task_board_access_q(user):
 
     department_ids = get_user_department_ids(user)
     q = Q(created_by=user)
-    q |= Q(members=user)
+    non_private_q = ~Q(access_scope=TaskBoardAccessScope.PRIVATE)
+    q |= non_private_q & Q(members=user)
     if department_ids:
-        q |= Q(departments__in=department_ids)
-    q |= Q(members__isnull=True, departments__isnull=True)
+        q |= non_private_q & Q(departments__in=department_ids)
+    q |= Q(
+        access_scope=TaskBoardAccessScope.ALL,
+        members__isnull=True,
+        departments__isnull=True,
+    )
     return q
 
 
@@ -53,13 +58,16 @@ def user_can_access_task_board(user, board: TaskBoard | None) -> bool:
         return True
     if board.created_by_id == user.id:
         return True
+    if board.access_scope == TaskBoardAccessScope.PRIVATE:
+        return False
     if board.members.filter(id=user.id).exists():
         return True
     department_ids = get_user_department_ids(user)
     if department_ids and board.departments.filter(id__in=department_ids).exists():
         return True
-    return (
-        not board.members.exists()
+    return bool(
+        board.access_scope == TaskBoardAccessScope.ALL
+        and not board.members.exists()
         and not board.departments.exists()
     )
 
diff --git a/backend/tasks/admin.py b/backend/tasks/admin.py
index 4f5ced13..2f1f281f 100644
--- a/backend/tasks/admin.py
+++ b/backend/tasks/admin.py
@@ -3,8 +3,11 @@ from django.contrib import admin
 from .models import (
     Task,
     TaskActivity,
+    TaskAttachment,
     TaskBoard,
+    TaskChecklistItem,
     TaskColumn,
+    TaskExternalLink,
     TaskLabel,
     TaskLinkedObject,
     TaskUserSettings,
@@ -25,8 +28,14 @@ class TaskLabelInline(admin.TabularInline):
 
 @admin.register(TaskBoard)
 class TaskBoardAdmin(admin.ModelAdmin):
-    list_display = ["name", "created_by", "is_archived", "created_at"]
-    list_filter = ["is_archived", "created_at"]
+    list_display = [
+        "name",
+        "created_by",
+        "access_scope",
+        "is_archived",
+        "created_at",
+    ]
+    list_filter = ["access_scope", "is_archived", "created_at"]
     search_fields = ["name", "description"]
     filter_horizontal = ["members", "departments"]
     inlines = [TaskColumnInline, TaskLabelInline]
@@ -62,6 +71,29 @@ class TaskAdmin(admin.ModelAdmin):
     filter_horizontal = ["labels"]
 
 
+@admin.register(TaskAttachment)
+class TaskAttachmentAdmin(admin.ModelAdmin):
+    list_display = ["file_name", "task", "uploaded_by", "file_size", "created_at"]
+    list_filter = ["created_at"]
+    search_fields = ["file_name", "task__title", "uploaded_by__email"]
+    autocomplete_fields = ["task", "uploaded_by"]
+
+
+@admin.register(TaskChecklistItem)
+class TaskChecklistItemAdmin(admin.ModelAdmin):
+    list_display = [
+        "title",
+        "task",
+        "position",
+        "is_completed",
+        "completed_by",
+        "updated_at",
+    ]
+    list_filter = ["is_completed", "created_at", "updated_at"]
+    search_fields = ["title", "task__title", "created_by__email"]
+    autocomplete_fields = ["task", "created_by", "completed_by"]
+
+
 @admin.register(TaskLinkedObject)
 class TaskLinkedObjectAdmin(admin.ModelAdmin):
     list_display = ["task", "kind", "content_type", "object_id", "created_by", "created_at"]
@@ -69,6 +101,14 @@ class TaskLinkedObjectAdmin(admin.ModelAdmin):
     search_fields = ["task__title", "created_by__email", "object_id"]
 
 
+@admin.register(TaskExternalLink)
+class TaskExternalLinkAdmin(admin.ModelAdmin):
+    list_display = ["title", "url", "task", "created_by", "created_at"]
+    list_filter = ["created_at"]
+    search_fields = ["title", "url", "task__title", "created_by__email"]
+    autocomplete_fields = ["task", "created_by"]
+
+
 @admin.register(TaskActivity)
 class TaskActivityAdmin(admin.ModelAdmin):
     list_display = ["task", "action", "actor", "object_kind", "object_id", "created_at"]
diff --git a/backend/tasks/apps.py b/backend/tasks/apps.py
index ea933ceb..02e6ff83 100644
--- a/backend/tasks/apps.py
+++ b/backend/tasks/apps.py
@@ -8,3 +8,4 @@ class TasksConfig(AppConfig):
 
     def ready(self):
         import tasks.notifications.signals  # noqa: F401
+        import tasks.signals  # noqa: F401
diff --git a/backend/tasks/migrations/0013_alter_taskactivity_action_taskattachment.py b/backend/tasks/migrations/0013_alter_taskactivity_action_taskattachment.py
new file mode 100644
index 00000000..262bdecb
--- /dev/null
+++ b/backend/tasks/migrations/0013_alter_taskactivity_action_taskattachment.py
@@ -0,0 +1,40 @@
+# Generated by Django 5.2.4 on 2026-07-16 14:54
+
+import django.db.models.deletion
+from django.conf import settings
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('tasks', '0012_taskusersettings'),
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='taskactivity',
+            name='action',
+            field=models.CharField(choices=[('created', 'Создал задачу'), ('updated', 'Обновил задачу'), ('moved', 'Переместил задачу'), ('linked', 'Связал объект'), ('unlinked', 'Убрал связь'), ('attachment_added', 'Добавил файл'), ('attachment_removed', 'Удалил файл')], max_length=32, verbose_name='Действие'),
+        ),
+        migrations.CreateModel(
+            name='TaskAttachment',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('file', models.FileField(upload_to='task_attachments/%Y/%m/%d/', verbose_name='Файл')),
+                ('file_name', models.CharField(max_length=255, verbose_name='Название файла')),
+                ('file_size', models.PositiveBigIntegerField(verbose_name='Размер файла (байты)')),
+                ('mime_type', models.CharField(blank=True, max_length=255, verbose_name='MIME-тип')),
+                ('created_at', models.DateTimeField(auto_now_add=True, verbose_name='Загружено')),
+                ('task', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='attachments', to='tasks.task', verbose_name='Задача')),
+                ('uploaded_by', models.ForeignKey(on_delete=django.db.models.deletion.PROTECT, related_name='uploaded_task_attachments', to=settings.AUTH_USER_MODEL, verbose_name='Загрузил')),
+            ],
+            options={
+                'verbose_name': 'Вложение задачи',
+                'verbose_name_plural': 'Вложения задач',
+                'ordering': ['created_at', 'id'],
+                'indexes': [models.Index(fields=['task', 'created_at'], name='tasks_taska_task_id_3aa34c_idx')],
+            },
+        ),
+    ]
diff --git a/backend/tasks/migrations/0014_alter_taskactivity_object_kind_and_more.py b/backend/tasks/migrations/0014_alter_taskactivity_object_kind_and_more.py
new file mode 100644
index 00000000..0ade891a
--- /dev/null
+++ b/backend/tasks/migrations/0014_alter_taskactivity_object_kind_and_more.py
@@ -0,0 +1,39 @@
+# Generated by Django 5.2.4 on 2026-07-16 15:52
+
+import django.db.models.deletion
+from django.conf import settings
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('tasks', '0013_alter_taskactivity_action_taskattachment'),
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='taskactivity',
+            name='object_kind',
+            field=models.CharField(blank=True, choices=[('post', 'Новость'), ('message', 'Сообщение'), ('calendar_event', 'Календарное событие'), ('document', 'Документ'), ('request', 'Заявление'), ('procurement_request', 'Заявка на закупку'), ('employee', 'Сотрудник'), ('guest', 'Гость'), ('guest_visit', 'Заявка на гостевой визит'), ('attendance_record', 'Запись посещаемости'), ('external_link', 'Внешняя ссылка')], max_length=32, verbose_name='Тип объекта'),
+        ),
+        migrations.CreateModel(
+            name='TaskExternalLink',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('url', models.URLField(max_length=2048, verbose_name='Ссылка')),
+                ('title', models.CharField(blank=True, max_length=255, verbose_name='Название')),
+                ('created_at', models.DateTimeField(auto_now_add=True, verbose_name='Создано')),
+                ('created_by', models.ForeignKey(on_delete=django.db.models.deletion.PROTECT, related_name='created_task_external_links', to=settings.AUTH_USER_MODEL, verbose_name='Добавил')),
+                ('task', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='external_links', to='tasks.task', verbose_name='Задача')),
+            ],
+            options={
+                'verbose_name': 'Внешняя ссылка задачи',
+                'verbose_name_plural': 'Внешние ссылки задач',
+                'ordering': ['-created_at', '-id'],
+                'indexes': [models.Index(fields=['task', 'created_at'], name='tasks_taske_task_id_d49775_idx')],
+                'constraints': [models.UniqueConstraint(fields=('task', 'url'), name='uniq_task_external_link')],
+            },
+        ),
+    ]
diff --git a/backend/tasks/migrations/0015_alter_taskactivity_action_and_more.py b/backend/tasks/migrations/0015_alter_taskactivity_action_and_more.py
new file mode 100644
index 00000000..56e61451
--- /dev/null
+++ b/backend/tasks/migrations/0015_alter_taskactivity_action_and_more.py
@@ -0,0 +1,47 @@
+# Generated by Django 5.2.4 on 2026-07-16 17:55
+
+import django.db.models.deletion
+from django.conf import settings
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('tasks', '0014_alter_taskactivity_object_kind_and_more'),
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='taskactivity',
+            name='action',
+            field=models.CharField(choices=[('created', 'Создал задачу'), ('updated', 'Обновил задачу'), ('moved', 'Переместил задачу'), ('linked', 'Связал объект'), ('unlinked', 'Убрал связь'), ('attachment_added', 'Добавил файл'), ('attachment_removed', 'Удалил файл'), ('checklist_item_added', 'Добавил пункт чек-листа'), ('checklist_item_updated', 'Изменил пункт чек-листа'), ('checklist_item_completed', 'Выполнил пункт чек-листа'), ('checklist_item_reopened', 'Вернул пункт чек-листа в работу'), ('checklist_item_removed', 'Удалил пункт чек-листа')], max_length=32, verbose_name='Действие'),
+        ),
+        migrations.AlterField(
+            model_name='taskactivity',
+            name='object_kind',
+            field=models.CharField(blank=True, choices=[('post', 'Новость'), ('message', 'Сообщение'), ('calendar_event', 'Календарное событие'), ('document', 'Документ'), ('request', 'Заявление'), ('procurement_request', 'Заявка на закупку'), ('employee', 'Сотрудник'), ('guest', 'Гость'), ('guest_visit', 'Заявка на гостевой визит'), ('attendance_record', 'Запись посещаемости'), ('external_link', 'Внешняя ссылка'), ('checklist_item', 'Пункт чек-листа')], max_length=32, verbose_name='Тип объекта'),
+        ),
+        migrations.CreateModel(
+            name='TaskChecklistItem',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('title', models.CharField(max_length=500, verbose_name='Пункт')),
+                ('position', models.PositiveIntegerField(default=0, verbose_name='Позиция')),
+                ('is_completed', models.BooleanField(default=False, verbose_name='Выполнен')),
+                ('completed_at', models.DateTimeField(blank=True, null=True, verbose_name='Выполнен')),
+                ('created_at', models.DateTimeField(auto_now_add=True, verbose_name='Создано')),
+                ('updated_at', models.DateTimeField(auto_now=True, verbose_name='Обновлено')),
+                ('completed_by', models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.SET_NULL, related_name='completed_task_checklist_items', to=settings.AUTH_USER_MODEL, verbose_name='Отметил выполненным')),
+                ('created_by', models.ForeignKey(on_delete=django.db.models.deletion.PROTECT, related_name='created_task_checklist_items', to=settings.AUTH_USER_MODEL, verbose_name='Создал')),
+                ('task', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='checklist_items', to='tasks.task', verbose_name='Задача')),
+            ],
+            options={
+                'verbose_name': 'Пункт чек-листа задачи',
+                'verbose_name_plural': 'Пункты чек-листа задач',
+                'ordering': ['position', 'id'],
+                'indexes': [models.Index(fields=['task', 'position'], name='tasks_taskc_task_id_0eaca5_idx'), models.Index(fields=['task', 'is_completed'], name='tasks_taskc_task_id_950de8_idx')],
+            },
+        ),
+    ]
diff --git a/backend/tasks/migrations/0016_taskboard_access_scope.py b/backend/tasks/migrations/0016_taskboard_access_scope.py
new file mode 100644
index 00000000..3289ac0d
--- /dev/null
+++ b/backend/tasks/migrations/0016_taskboard_access_scope.py
@@ -0,0 +1,43 @@
+# Generated by Django 5.2.4 on 2026-07-17 05:29
+
+from django.db import migrations, models
+
+
+def preserve_restricted_boards(apps, schema_editor):
+    TaskBoard = apps.get_model("tasks", "TaskBoard")
+    restricted_ids = TaskBoard.objects.filter(
+        models.Q(members__isnull=False) | models.Q(departments__isnull=False)
+    ).values_list("id", flat=True)
+    TaskBoard.objects.filter(id__in=restricted_ids).update(access_scope="restricted")
+
+
+def restore_legacy_access(apps, schema_editor):
+    TaskBoard = apps.get_model("tasks", "TaskBoard")
+    TaskBoard.objects.filter(access_scope="restricted").update(access_scope="all")
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("tasks", "0015_alter_taskactivity_action_and_more"),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name="taskboard",
+            name="access_scope",
+            field=models.CharField(
+                choices=[
+                    ("all", "Для всех"),
+                    ("private", "Для себя"),
+                    ("restricted", "Выборочно"),
+                ],
+                default="all",
+                max_length=16,
+                verbose_name="Доступ",
+            ),
+        ),
+        migrations.RunPython(
+            preserve_restricted_boards,
+            restore_legacy_access,
+        ),
+    ]
diff --git a/backend/tasks/migrations/0017_task_comment_activity.py b/backend/tasks/migrations/0017_task_comment_activity.py
new file mode 100644
index 00000000..2559b552
--- /dev/null
+++ b/backend/tasks/migrations/0017_task_comment_activity.py
@@ -0,0 +1,59 @@
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("tasks", "0016_taskboard_access_scope"),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name="taskactivity",
+            name="action",
+            field=models.CharField(
+                choices=[
+                    ("created", "Создал задачу"),
+                    ("updated", "Обновил задачу"),
+                    ("moved", "Переместил задачу"),
+                    ("linked", "Связал объект"),
+                    ("unlinked", "Убрал связь"),
+                    ("attachment_added", "Добавил файл"),
+                    ("attachment_removed", "Удалил файл"),
+                    ("checklist_item_added", "Добавил пункт чек-листа"),
+                    ("checklist_item_updated", "Изменил пункт чек-листа"),
+                    ("checklist_item_completed", "Выполнил пункт чек-листа"),
+                    ("checklist_item_reopened", "Вернул пункт чек-листа в работу"),
+                    ("checklist_item_removed", "Удалил пункт чек-листа"),
+                    ("comment_added", "Добавил комментарий"),
+                    ("comment_edited", "Изменил комментарий"),
+                    ("comment_removed", "Удалил комментарий"),
+                ],
+                max_length=32,
+                verbose_name="Действие",
+            ),
+        ),
+        migrations.AlterField(
+            model_name="taskactivity",
+            name="object_kind",
+            field=models.CharField(
+                blank=True,
+                choices=[
+                    ("post", "Новость"),
+                    ("message", "Сообщение"),
+                    ("calendar_event", "Календарное событие"),
+                    ("document", "Документ"),
+                    ("request", "Заявление"),
+                    ("procurement_request", "Заявка на закупку"),
+                    ("employee", "Сотрудник"),
+                    ("guest", "Гость"),
+                    ("guest_visit", "Заявка на гостевой визит"),
+                    ("attendance_record", "Запись посещаемости"),
+                    ("external_link", "Внешняя ссылка"),
+                    ("checklist_item", "Пункт чек-листа"),
+                    ("comment", "Комментарий"),
+                ],
+                max_length=32,
+                verbose_name="Тип объекта",
+            ),
+        ),
+    ]
diff --git a/backend/tasks/migrations/0018_task_claim_activity.py b/backend/tasks/migrations/0018_task_claim_activity.py
new file mode 100644
index 00000000..ab03193f
--- /dev/null
+++ b/backend/tasks/migrations/0018_task_claim_activity.py
@@ -0,0 +1,36 @@
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("tasks", "0017_task_comment_activity"),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name="taskactivity",
+            name="action",
+            field=models.CharField(
+                choices=[
+                    ("created", "Создал задачу"),
+                    ("updated", "Обновил задачу"),
+                    ("claimed", "Взял задачу в работу"),
+                    ("moved", "Переместил задачу"),
+                    ("linked", "Связал объект"),
+                    ("unlinked", "Убрал связь"),
+                    ("attachment_added", "Добавил файл"),
+                    ("attachment_removed", "Удалил файл"),
+                    ("checklist_item_added", "Добавил пункт чек-листа"),
+                    ("checklist_item_updated", "Изменил пункт чек-листа"),
+                    ("checklist_item_completed", "Выполнил пункт чек-листа"),
+                    ("checklist_item_reopened", "Вернул пункт чек-листа в работу"),
+                    ("checklist_item_removed", "Удалил пункт чек-листа"),
+                    ("comment_added", "Добавил комментарий"),
+                    ("comment_edited", "Изменил комментарий"),
+                    ("comment_removed", "Удалил комментарий"),
+                ],
+                max_length=32,
+                verbose_name="Действие",
+            ),
+        ),
+    ]
diff --git a/backend/tasks/models.py b/backend/tasks/models.py
index 596d2948..c9f088d0 100644
--- a/backend/tasks/models.py
+++ b/backend/tasks/models.py
@@ -13,6 +13,12 @@ class TaskPriority(models.TextChoices):
     CRITICAL = "critical", "Критический"
 
 
+class TaskBoardAccessScope(models.TextChoices):
+    ALL = "all", "Для всех"
+    PRIVATE = "private", "Для себя"
+    RESTRICTED = "restricted", "Выборочно"
+
+
 class TaskBoard(models.Model):
     name = models.CharField("Название", max_length=255)
     description = models.TextField("Описание", blank=True)
@@ -34,6 +40,12 @@ class TaskBoard(models.Model):
         related_name="task_boards",
         verbose_name="Отделы",
     )
+    access_scope = models.CharField(
+        "Доступ",
+        max_length=16,
+        choices=TaskBoardAccessScope.choices,
+        default=TaskBoardAccessScope.ALL,
+    )
     is_archived = models.BooleanField("Архивная", default=False)
     created_at = models.DateTimeField("Создано", auto_now_add=True)
     updated_at = models.DateTimeField("Обновлено", auto_now=True)
@@ -199,6 +211,79 @@ class Task(models.Model):
         super().save(*args, **kwargs)
 
 
+class TaskAttachment(models.Model):
+    task = models.ForeignKey(
+        Task,
+        on_delete=models.CASCADE,
+        related_name="attachments",
+        verbose_name="Задача",
+    )
+    file = models.FileField(
+        "Файл",
+        upload_to="task_attachments/%Y/%m/%d/",
+    )
+    file_name = models.CharField("Название файла", max_length=255)
+    file_size = models.PositiveBigIntegerField("Размер файла (байты)")
+    mime_type = models.CharField("MIME-тип", max_length=255, blank=True)
+    uploaded_by = models.ForeignKey(
+        settings.AUTH_USER_MODEL,
+        on_delete=models.PROTECT,
+        related_name="uploaded_task_attachments",
+        verbose_name="Загрузил",
+    )
+    created_at = models.DateTimeField("Загружено", auto_now_add=True)
+
+    class Meta:
+        verbose_name = "Вложение задачи"
+        verbose_name_plural = "Вложения задач"
+        ordering = ["created_at", "id"]
+        indexes = [models.Index(fields=["task", "created_at"])]
+
+    def __str__(self):
+        return f"{self.task}: {self.file_name}"
+
+
+class TaskChecklistItem(models.Model):
+    task = models.ForeignKey(
+        Task,
+        on_delete=models.CASCADE,
+        related_name="checklist_items",
+        verbose_name="Задача",
+    )
+    title = models.CharField("Пункт", max_length=500)
+    position = models.PositiveIntegerField("Позиция", default=0)
+    is_completed = models.BooleanField("Выполнен", default=False)
+    created_by = models.ForeignKey(
+        settings.AUTH_USER_MODEL,
+        on_delete=models.PROTECT,
+        related_name="created_task_checklist_items",
+        verbose_name="Создал",
+    )
+    completed_by = models.ForeignKey(
+        settings.AUTH_USER_MODEL,
+        on_delete=models.SET_NULL,
+        null=True,
+        blank=True,
+        related_name="completed_task_checklist_items",
+        verbose_name="Отметил выполненным",
+    )
+    completed_at = models.DateTimeField("Выполнен", null=True, blank=True)
+    created_at = models.DateTimeField("Создано", auto_now_add=True)
+    updated_at = models.DateTimeField("Обновлено", auto_now=True)
+
+    class Meta:
+        verbose_name = "Пункт чек-листа задачи"
+        verbose_name_plural = "Пункты чек-листа задач"
+        ordering = ["position", "id"]
+        indexes = [
+            models.Index(fields=["task", "position"]),
+            models.Index(fields=["task", "is_completed"]),
+        ]
+
+    def __str__(self):
+        return f"{self.task}: {self.title}"
+
+
 class TaskLinkedObjectKind(models.TextChoices):
     POST = "post", "Новость"
     MESSAGE = "message", "Сообщение"
@@ -212,12 +297,45 @@ class TaskLinkedObjectKind(models.TextChoices):
     ATTENDANCE_RECORD = "attendance_record", "Запись посещаемости"
 
 
+class TaskActivityObjectKind(models.TextChoices):
+    POST = "post", "Новость"
+    MESSAGE = "message", "Сообщение"
+    CALENDAR_EVENT = "calendar_event", "Календарное событие"
+    DOCUMENT = "document", "Документ"
+    REQUEST = "request", "Заявление"
+    PROCUREMENT_REQUEST = "procurement_request", "Заявка на закупку"
+    EMPLOYEE = "employee", "Сотрудник"
+    GUEST = "guest", "Гость"
+    GUEST_VISIT = "guest_visit", "Заявка на гостевой визит"
+    ATTENDANCE_RECORD = "attendance_record", "Запись посещаемости"
+    EXTERNAL_LINK = "external_link", "Внешняя ссылка"
+    CHECKLIST_ITEM = "checklist_item", "Пункт чек-листа"
+    COMMENT = "comment", "Комментарий"
+
+
 class TaskActivityAction(models.TextChoices):
     CREATED = "created", "Создал задачу"
     UPDATED = "updated", "Обновил задачу"
+    CLAIMED = "claimed", "Взял задачу в работу"
     MOVED = "moved", "Переместил задачу"
     LINKED = "linked", "Связал объект"
     UNLINKED = "unlinked", "Убрал связь"
+    ATTACHMENT_ADDED = "attachment_added", "Добавил файл"
+    ATTACHMENT_REMOVED = "attachment_removed", "Удалил файл"
+    CHECKLIST_ITEM_ADDED = "checklist_item_added", "Добавил пункт чек-листа"
+    CHECKLIST_ITEM_UPDATED = "checklist_item_updated", "Изменил пункт чек-листа"
+    CHECKLIST_ITEM_COMPLETED = (
+        "checklist_item_completed",
+        "Выполнил пункт чек-листа",
+    )
+    CHECKLIST_ITEM_REOPENED = (
+        "checklist_item_reopened",
+        "Вернул пункт чек-листа в работу",
+    )
+    CHECKLIST_ITEM_REMOVED = "checklist_item_removed", "Удалил пункт чек-листа"
+    COMMENT_ADDED = "comment_added", "Добавил комментарий"
+    COMMENT_EDITED = "comment_edited", "Изменил комментарий"
+    COMMENT_REMOVED = "comment_removed", "Удалил комментарий"
 
 
 class TaskActivity(models.Model):
@@ -243,7 +361,7 @@ class TaskActivity(models.Model):
     object_kind = models.CharField(
         "Тип объекта",
         max_length=32,
-        choices=TaskLinkedObjectKind.choices,
+        choices=TaskActivityObjectKind.choices,
         blank=True,
     )
     object_id = models.PositiveBigIntegerField("ID объекта", null=True, blank=True)
@@ -307,3 +425,36 @@ class TaskLinkedObject(models.Model):
 
     def __str__(self):
         return f"{self.task} -> {self.kind}:{self.object_id}"
+
+
+class TaskExternalLink(models.Model):
+    task = models.ForeignKey(
+        Task,
+        on_delete=models.CASCADE,
+        related_name="external_links",
+        verbose_name="Задача",
+    )
+    url = models.URLField("Ссылка", max_length=2048)
+    title = models.CharField("Название", max_length=255, blank=True)
+    created_by = models.ForeignKey(
+        settings.AUTH_USER_MODEL,
+        on_delete=models.PROTECT,
+        related_name="created_task_external_links",
+        verbose_name="Добавил",
+    )
+    created_at = models.DateTimeField("Создано", auto_now_add=True)
+
+    class Meta:
+        verbose_name = "Внешняя ссылка задачи"
+        verbose_name_plural = "Внешние ссылки задач"
+        ordering = ["-created_at", "-id"]
+        constraints = [
+            models.UniqueConstraint(
+                fields=["task", "url"],
+                name="uniq_task_external_link",
+            )
+        ]
+        indexes = [models.Index(fields=["task", "created_at"])]
+
+    def __str__(self):
+        return f"{self.task} -> {self.title or self.url}"
diff --git a/backend/tasks/realtime.py b/backend/tasks/realtime.py
index fccecee3..7a84a966 100644
--- a/backend/tasks/realtime.py
+++ b/backend/tasks/realtime.py
@@ -9,7 +9,7 @@ from django.db.models import Q
 
 from employees.models import Department, EmployeeDepartment, RoleAssignment
 
-from .models import TaskBoard
+from .models import TaskBoard, TaskBoardAccessScope
 
 logger = logging.getLogger(__name__)
 
@@ -20,16 +20,27 @@ def get_task_board_recipient_ids(board: TaskBoard) -> set[int]:
 
     User = get_user_model()
     admin_q = Q(is_staff=True) | Q(is_superuser=True)
+    is_private = board.access_scope == TaskBoardAccessScope.PRIVATE
 
-    if not board.members.exists() and not board.departments.exists():
+    if (
+        not is_private
+        and board.access_scope == TaskBoardAccessScope.ALL
+        and not board.members.exists()
+        and not board.departments.exists()
+    ):
         return set(
             User.objects.filter(is_active=True)
             .values_list("id", flat=True)
         )
 
-    department_ids = list(board.departments.values_list("id", flat=True))
+    department_ids = (
+        []
+        if is_private
+        else list(board.departments.values_list("id", flat=True))
+    )
     recipient_ids = {board.created_by_id}
-    recipient_ids.update(board.members.values_list("id", flat=True))
+    if not is_private:
+        recipient_ids.update(board.members.values_list("id", flat=True))
 
     if department_ids:
         recipient_ids.update(
diff --git a/backend/tasks/signals.py b/backend/tasks/signals.py
new file mode 100644
index 00000000..fbd7199a
--- /dev/null
+++ b/backend/tasks/signals.py
@@ -0,0 +1,15 @@
+from django.db import transaction
+from django.db.models.signals import post_delete
+from django.dispatch import receiver
+
+from .models import TaskAttachment
+
+
+@receiver(post_delete, sender=TaskAttachment)
+def delete_task_attachment_file(sender, instance, **kwargs):
+    if not instance.file or not instance.file.name:
+        return
+
+    storage = instance.file.storage
+    name = instance.file.name
+    transaction.on_commit(lambda: storage.delete(name) if storage.exists(name) else None)
diff --git a/backend/tests/api/v1/documents/test_documents_api.py b/backend/tests/api/v1/documents/test_documents_api.py
index 0326b30d..e5729e23 100644
--- a/backend/tests/api/v1/documents/test_documents_api.py
+++ b/backend/tests/api/v1/documents/test_documents_api.py
@@ -173,6 +173,15 @@ def api_urls():
     def _acknowledgements(pk: int) -> str:
         return reverse("api:v1:documents-acknowledgements", args=[pk])
 
+    def _comments(pk: int) -> str:
+        return reverse("api:v1:documents-comments", args=[pk])
+
+    def _comment_detail(pk: int, comment_id: int) -> str:
+        return reverse(
+            "api:v1:documents-document-comment",
+            args=[pk, comment_id],
+        )
+
     def _folder_detail(pk: int) -> str:
         return reverse("api:v1:folders-detail", args=[pk])
 
@@ -185,6 +194,8 @@ def api_urls():
         "detail": _detail,
         "ack": _ack,
         "acknowledgements": _acknowledgements,
+        "comments": _comments,
+        "comment_detail": _comment_detail,
         "folder_detail": _folder_detail,
         "folder_archive": _folder_archive,
     }
@@ -1038,10 +1049,6 @@ class TestDocumentNotifications:
         def fake_notify_send(**kwargs):
             calls.append(kwargs)
 
-        monkeypatch.setattr(
-            "documents.notifications.handlers.notify.send",
-            fake_notify_send,
-        )
         author = make_user("required-document-author@example.com")
         viewer = make_user("required-document-viewer@example.com")
         doc = make_document(
@@ -1049,6 +1056,11 @@ class TestDocumentNotifications:
             uploaded_by=author,
             sent_to_all=False,
             acknowledgement_required=True,
+            recipients=[viewer],
+        )
+        monkeypatch.setattr(
+            "documents.notifications.handlers.notify.send",
+            fake_notify_send,
         )
 
         notify_document_ready(doc, viewer)
@@ -1208,6 +1220,197 @@ class TestAcknowledge:
             user=viewer,
         ).exists()
 
+    def test_new_document_defaults_to_all_access_and_all_acknowledgement(
+        self, auth_client, make_user, api_urls
+    ):
+        """Новый документ без настроек доступен всем и требует ознакомления от всех."""
+        author = make_user("default-audience-author@example.com")
+
+        response = auth_client(author).post(
+            api_urls["list"],
+            {"title": "Общий регламент"},
+            format="json",
+        )
+
+        assert response.status_code == status.HTTP_201_CREATED, response.content
+        document = Document.objects.get(pk=response.json()["id"])
+        assert document.sent_to_all is True
+        assert document.acknowledgement_required is True
+        assert document.acknowledgement_for_all is True
+        assert response.json()["acknowledgement_required_for_user"] is True
+
+    def test_selective_acknowledgement_is_independent_from_access(
+        self, auth_client, make_user, api_urls
+    ):
+        """Доступный документ подтверждают только сотрудники из отдельной аудитории."""
+        author = make_user("selective-author@example.com")
+        required_user = make_user("selective-required@example.com")
+        access_only_user = make_user("selective-access-only@example.com")
+
+        response = auth_client(author).post(
+            api_urls["list"],
+            {
+                "title": "Выборочное ознакомление",
+                "sent_to_all": False,
+                "recipient_ids": [required_user.id, access_only_user.id],
+                "acknowledgement_required": True,
+                "acknowledgement_for_all": False,
+                "acknowledgement_recipient_ids": [required_user.id],
+            },
+            format="json",
+        )
+
+        assert response.status_code == status.HTTP_201_CREATED, response.content
+        document_id = response.json()["id"]
+        assert [
+            recipient["id"]
+            for recipient in response.json()["acknowledgement_recipients"]
+        ] == [required_user.id]
+
+        access_only_detail = auth_client(access_only_user).get(
+            api_urls["detail"](document_id)
+        )
+        assert access_only_detail.status_code == status.HTTP_200_OK
+        assert access_only_detail.json()["acknowledgement_required_for_user"] is False
+        assert access_only_detail.json()["acknowledged_count"] == 0
+        assert access_only_detail.json()["acknowledgement_total"] == 1
+        rejected = auth_client(access_only_user).post(api_urls["ack"](document_id), {})
+        assert rejected.status_code == status.HTTP_400_BAD_REQUEST
+
+        required_detail = auth_client(required_user).get(api_urls["detail"](document_id))
+        assert required_detail.json()["acknowledgement_required_for_user"] is True
+        acknowledged = auth_client(required_user).post(api_urls["ack"](document_id), {})
+        assert acknowledged.status_code == status.HTTP_200_OK
+        refreshed_detail = auth_client(required_user).get(
+            api_urls["detail"](document_id)
+        )
+        assert refreshed_detail.json()["acknowledged_count"] == 1
+        assert refreshed_detail.json()["acknowledgement_total"] == 1
+
+        report = auth_client(access_only_user).get(
+            api_urls["acknowledgements"](document_id)
+        )
+        assert report.status_code == status.HTTP_200_OK
+        assert report.json()["counts"] == {
+            "acknowledged": 1,
+            "unacknowledged": 0,
+            "total": 1,
+        }
+        assert report.json()["acknowledged"][0]["id"] == required_user.id
+
+    def test_selective_acknowledgement_cannot_exceed_document_access(
+        self, auth_client, make_user, api_urls
+    ):
+        """Нельзя обязать ознакомиться сотрудника без доступа к документу."""
+        author = make_user("invalid-audience-author@example.com")
+        recipient = make_user("invalid-audience-recipient@example.com")
+        outsider = make_user("invalid-audience-outsider@example.com")
+
+        response = auth_client(author).post(
+            api_urls["list"],
+            {
+                "title": "Некорректная аудитория",
+                "sent_to_all": False,
+                "recipient_ids": [recipient.id],
+                "acknowledgement_required": True,
+                "acknowledgement_for_all": False,
+                "acknowledgement_recipient_ids": [outsider.id],
+            },
+            format="json",
+        )
+
+        assert response.status_code == status.HTTP_400_BAD_REQUEST
+        assert "acknowledgement_recipient_ids" in response.json()
+
+    def test_edit_replaces_acknowledgement_audience_without_changing_access(
+        self, auth_client, make_user, api_urls
+    ):
+        """Редактирование меняет только отдельную аудиторию ознакомления."""
+        author = make_user("edit-audience-author@example.com")
+        grant_perms(author, "change_document")
+        first_recipient = make_user("edit-audience-first@example.com")
+        second_recipient = make_user("edit-audience-second@example.com")
+        document = make_document(
+            uploaded_by=author,
+            sent_to_all=False,
+            acknowledgement_required=True,
+            recipients=[first_recipient, second_recipient],
+        )
+        document.acknowledgement_for_all = False
+        document.save(update_fields=["acknowledgement_for_all"])
+        document.acknowledgement_recipients.set([first_recipient])
+
+        response = auth_client(author).patch(
+            api_urls["detail"](document.pk),
+            {"acknowledgement_recipient_ids": [second_recipient.id]},
+            format="json",
+        )
+
+        assert response.status_code == status.HTTP_200_OK, response.content
+        document.refresh_from_db()
+        assert set(document.recipients.values_list("id", flat=True)) == {
+            first_recipient.id,
+            second_recipient.id,
+        }
+        assert list(
+            document.acknowledgement_recipients.values_list("id", flat=True)
+        ) == [second_recipient.id]
+        assert [
+            recipient["id"]
+            for recipient in response.json()["acknowledgement_recipients"]
+        ] == [second_recipient.id]
+
+    def test_document_comments_crud_and_counter(
+        self, auth_client, make_user, api_urls
+    ):
+        """Комментарии документа работают через Communications и попадают в счётчик."""
+        author = make_user("document-comment-author@example.com")
+        other_user = make_user("document-comment-other@example.com")
+        document = make_document(
+            uploaded_by=author,
+            sent_to_all=True,
+        )
+        client = auth_client(author)
+
+        empty_detail = client.get(api_urls["detail"](document.pk))
+        assert empty_detail.json()["comments_count"] == 0
+
+        created = client.post(
+            api_urls["comments"](document.pk),
+            {"text": "Первый комментарий"},
+            format="json",
+        )
+        assert created.status_code == status.HTTP_201_CREATED, created.content
+        comment_id = created.json()["id"]
+        assert created.json()["text"] == "Первый комментарий"
+
+        detail = client.get(api_urls["detail"](document.pk))
+        assert detail.json()["comments_count"] == 1
+
+        edited = client.patch(
+            api_urls["comment_detail"](document.pk, comment_id),
+            {"text": "Исправленный комментарий"},
+            format="json",
+        )
+        assert edited.status_code == status.HTTP_200_OK
+        assert edited.json()["text"] == "Исправленный комментарий"
+        assert edited.json()["is_edited"] is True
+
+        forbidden = auth_client(other_user).patch(
+            api_urls["comment_detail"](document.pk, comment_id),
+            {"text": "Чужая правка"},
+            format="json",
+        )
+        assert forbidden.status_code == status.HTTP_403_FORBIDDEN
+
+        deleted = client.delete(
+            api_urls["comment_detail"](document.pk, comment_id)
+        )
+        assert deleted.status_code == status.HTTP_204_NO_CONTENT
+        assert client.get(api_urls["detail"](document.pk)).json()[
+            "comments_count"
+        ] == 0
+
 
 class TestAcknowledgementsReport:
     """Ведомость ознакомлений доступна всем, кому доступен документ."""
@@ -1379,10 +1582,10 @@ class TestErrorsAndEdgeCases:
         assert client.get(api_urls["list"]).status_code == 200
         assert client.get(api_urls["detail"](d.pk)).status_code == 404
 
-    def test_big_file_over_limit_if_configured(
-        self, auth_client, make_user, api_urls, settings
+    def test_big_file_is_accepted(
+        self, auth_client, make_user, api_urls
     ):
-        """Большой файл > лимита → ожидаем 413 или 400 (если лимит включён); иначе 201."""
+        """Размер файла сам по себе не блокирует загрузку."""
         uploader = make_user("uploader@example.com", staff=True)
         client = auth_client(uploader)
 
@@ -1392,10 +1595,7 @@ class TestErrorsAndEdgeCases:
             {"title": "Big", "file": big, "sent_to_all": True},
             format="multipart",
         )
-        # django-filer не проверяет DATA_UPLOAD_MAX_MEMORY_SIZE при загрузке
-        # Лимит применяется на уровне Django request parserа, но во время тестов это может не работать
-        # Просто проверяем, что запрос корректно обработан
-        assert r.status_code in (200, 201, 400, 413)
+        assert r.status_code == 201
 
 # -------------------- I. Производительность/фильтры --------------------
 
diff --git a/backend/tests/api/v1/procurement/test_procurement_requests.py b/backend/tests/api/v1/procurement/test_procurement_requests.py
index 91c00cd3..90396c57 100644
--- a/backend/tests/api/v1/procurement/test_procurement_requests.py
+++ b/backend/tests/api/v1/procurement/test_procurement_requests.py
@@ -9,6 +9,7 @@ from unittest.mock import patch
 import pytest
 from django.contrib.auth.models import Permission
 from django.contrib.contenttypes.models import ContentType
+from django.core.files.uploadedfile import SimpleUploadedFile
 from django.urls import reverse
 from django.utils.dateparse import parse_datetime
 from django.utils import timezone
@@ -37,8 +38,11 @@ from procurement.models import (
     Approval,
     ApprovalRoute,
     Budget,
+    ProcurementActivityAction,
     ProcurementItem,
+    ProcurementItemAttachment,
     ProcurementRequest,
+    ProcurementRequestActivity,
     ProcurementSettings,
 )
 from procurement.notifications.handlers import notify_new_request
@@ -605,6 +609,10 @@ class TestProcurementRequestCreate:
         assert response.data['title'] == 'Закупка мониторов'
         assert response.data['requestor'] == user.id
         assert response.data['status'] == ProcurementStatus.DRAFT
+        assert [item['id'] for item in response.data['items']] == list(
+            ProcurementRequest.objects.get(pk=response.data['id'])
+            .items.values_list('id', flat=True)
+        )
         
         # Проверяем что позиции созданы
         request_id = response.data['id']
@@ -834,6 +842,17 @@ class TestProcurementRequestComments:
         after = api_client.get(list_url)
         after_item = next(item for item in after.data['results'] if item['id'] == procurement_request.id)
         assert after_item['comments_count'] == 0
+        assert list(
+            procurement_request.activities.filter(
+                action__in=[
+                    ProcurementActivityAction.COMMENT_ADDED,
+                    ProcurementActivityAction.COMMENT_REMOVED,
+                ]
+            ).values_list("action", flat=True)
+        ) == [
+            ProcurementActivityAction.COMMENT_REMOVED,
+            ProcurementActivityAction.COMMENT_ADDED,
+        ]
 
 
 class TestProcurementItemComments:
@@ -912,6 +931,18 @@ class TestProcurementItemComments:
             if item['id'] == procurement_item.id
         )
         assert after_item['comments_count'] == 0
+        comment_activities = procurement_item.request.activities.filter(
+            action__in=[
+                ProcurementActivityAction.COMMENT_ADDED,
+                ProcurementActivityAction.COMMENT_REMOVED,
+            ],
+            object_id=comment_id,
+        )
+        assert list(comment_activities.values_list("action", flat=True)) == [
+            ProcurementActivityAction.COMMENT_REMOVED,
+            ProcurementActivityAction.COMMENT_ADDED,
+        ]
+        assert comment_activities.first().metadata["item_id"] == procurement_item.id
 
     def test_outsider_cannot_comment_item(
         self, api_client, procurement_item
@@ -992,6 +1023,123 @@ class TestProcurementItemComments:
         assert response.data['item'] == item.id
 
 
+class TestProcurementItemAttachments:
+    def test_archive_attachment_lifecycle(
+        self,
+        api_client,
+        user,
+        procurement_item,
+        settings,
+        tmp_path,
+    ):
+        settings.MEDIA_ROOT = tmp_path
+        api_client.force_authenticate(user=user)
+        attachments_url = reverse(
+            'api:v1:procurement:procurementitem-attachments',
+            kwargs={'pk': procurement_item.id},
+        )
+
+        archive_content = b'PK\x03\x04procurement archive content'
+        response = api_client.post(
+            attachments_url,
+            {
+                'files': SimpleUploadedFile(
+                    'specification.zip',
+                    archive_content,
+                    content_type='application/zip',
+                ),
+            },
+            format='multipart',
+        )
+
+        assert response.status_code == status.HTTP_201_CREATED
+        assert response.data[0]['file_name'] == 'specification.zip'
+        assert response.data[0]['mime_type'] == 'application/zip'
+        attachment_id = response.data[0]['id']
+        assert ProcurementItemAttachment.objects.filter(pk=attachment_id).exists()
+
+        request_detail = api_client.get(
+            reverse(
+                'api:v1:procurement:procurementrequest-detail',
+                kwargs={'pk': procurement_item.request_id},
+            )
+        )
+        detail_item = next(
+            item for item in request_detail.data['items']
+            if item['id'] == procurement_item.id
+        )
+        assert detail_item['attachments_count'] == 1
+        assert detail_item['attachments'][0]['id'] == attachment_id
+
+        attachment_url = reverse(
+            'api:v1:procurement:procurementitem-attachment-detail',
+            kwargs={
+                'pk': procurement_item.id,
+                'attachment_id': attachment_id,
+            },
+        )
+        download_response = api_client.get(attachment_url)
+        assert download_response.status_code == status.HTTP_200_OK
+        assert b''.join(download_response.streaming_content) == archive_content
+
+        delete_response = api_client.delete(attachment_url)
+        assert delete_response.status_code == status.HTTP_204_NO_CONTENT
+        assert not ProcurementItemAttachment.objects.filter(pk=attachment_id).exists()
+        attachment_activities = procurement_item.request.activities.filter(
+            action__in=[
+                ProcurementActivityAction.ATTACHMENT_ADDED,
+                ProcurementActivityAction.ATTACHMENT_REMOVED,
+            ],
+            object_id=attachment_id,
+        )
+        assert list(attachment_activities.values_list("action", flat=True)) == [
+            ProcurementActivityAction.ATTACHMENT_REMOVED,
+            ProcurementActivityAction.ATTACHMENT_ADDED,
+        ]
+        assert attachment_activities.first().metadata["file_name"] == "specification.zip"
+
+    def test_outsider_cannot_access_attachment(
+        self,
+        api_client,
+        procurement_item,
+        user,
+        settings,
+        tmp_path,
+    ):
+        settings.MEDIA_ROOT = tmp_path
+        attachment = ProcurementItemAttachment.objects.create(
+            item=procurement_item,
+            file=SimpleUploadedFile('private.txt', b'private'),
+            file_name='private.txt',
+            file_size=7,
+            mime_type='text/plain',
+            uploaded_by=user,
+        )
+        outsider = Employee.objects.create_user(
+            email='attachment-outsider@example.com',
+            password='testpass123',
+            phone_number='+79997777773',
+            first_name='Чужой',
+            last_name='Получатель',
+            is_active=True,
+            email_verified=True,
+            send_activation_email=False,
+        )
+        api_client.force_authenticate(user=outsider)
+
+        response = api_client.get(
+            reverse(
+                'api:v1:procurement:procurementitem-attachment-detail',
+                kwargs={
+                    'pk': procurement_item.id,
+                    'attachment_id': attachment.id,
+                },
+            )
+        )
+
+        assert response.status_code == status.HTTP_403_FORBIDDEN
+
+
 # ==============================================================================
 # ТЕСТЫ ОБНОВЛЕНИЯ ЗАЯВОК
 # ==============================================================================
@@ -1039,6 +1187,67 @@ class TestProcurementRequestUpdate:
         assert response.status_code == status.HTTP_403_FORBIDDEN
 
 
+class TestProcurementRequestActivity:
+    def test_activity_endpoint_returns_creation_and_update_history(
+        self,
+        api_client,
+        user,
+        procurement_request,
+    ):
+        api_client.force_authenticate(user=user)
+        detail_url = reverse(
+            "api:v1:procurement:procurementrequest-detail",
+            kwargs={"pk": procurement_request.pk},
+        )
+        activity_url = reverse(
+            "api:v1:procurement:procurementrequest-activity",
+            kwargs={"pk": procurement_request.pk},
+        )
+
+        update_response = api_client.patch(
+            detail_url,
+            {"title": "Новое название истории"},
+            format="json",
+        )
+        assert update_response.status_code == status.HTTP_200_OK
+
+        response = api_client.get(activity_url)
+        assert response.status_code == status.HTTP_200_OK
+        assert [entry["action"] for entry in response.data[:2]] == [
+            ProcurementActivityAction.UPDATED,
+            ProcurementActivityAction.CREATED,
+        ]
+        assert response.data[0]["actor"]["id"] == user.id
+        assert response.data[0]["metadata"]["fields"] == ["title"]
+
+        detail_response = api_client.get(detail_url)
+        assert detail_response.status_code == status.HTTP_200_OK
+        assert detail_response.data["activity_count"] == 2
+
+    def test_outsider_cannot_read_activity(
+        self,
+        api_client,
+        procurement_request,
+    ):
+        outsider = Employee.objects.create_user(
+            email="activity-outsider@example.com",
+            password="testpass123",
+            phone_number="+79998888777",
+            is_active=True,
+            email_verified=True,
+            send_activation_email=False,
+        )
+        api_client.force_authenticate(user=outsider)
+        url = reverse(
+            "api:v1:procurement:procurementrequest-activity",
+            kwargs={"pk": procurement_request.pk},
+        )
+
+        response = api_client.get(url)
+
+        assert response.status_code == status.HTTP_404_NOT_FOUND
+
+
 # ==============================================================================
 # ТЕСТЫ АДРЕСНЫХ ЗАЯВОК В ОТДЕЛ-ИСПОЛНИТЕЛЬ
 # ==============================================================================
@@ -1542,6 +1751,11 @@ class TestProcessingDepartmentWorkflow:
         processing_request.refresh_from_db()
         assert processing_request.executor == supply_user
         assert processing_request.status == ProcurementStatus.IN_PROGRESS
+        started_activity = ProcurementRequestActivity.objects.filter(
+            request=processing_request,
+            action=ProcurementActivityAction.STARTED,
+        ).latest("created_at")
+        assert started_activity.actor == supply_user
 
         api_client.force_authenticate(user=user)
         edit_response = api_client.patch(
@@ -1598,11 +1812,17 @@ class TestProcessingDepartmentWorkflow:
         processing_request.refresh_from_db()
         assert processing_request.executor == supply_replacement_user
         assert processing_request.status == ProcurementStatus.IN_PROGRESS
-        assert processing_request.started_at > previous_started_at
+        assert processing_request.started_at == previous_started_at
         assert response.data["executor"] == supply_replacement_user.id
         assert response.data["executor_name"] == (
             supply_replacement_user.get_full_name()
         )
+        reassigned_activity = ProcurementRequestActivity.objects.get(
+            request=processing_request,
+            action=ProcurementActivityAction.EXECUTOR_REASSIGNED,
+        )
+        assert reassigned_activity.actor == supply_replacement_user
+        assert reassigned_activity.metadata["previous_executor_id"] == supply_user.id
 
     def test_available_scope_includes_reassignable_processing_request(
         self, api_client, supply_user, supply_replacement_user,
@@ -1865,6 +2085,110 @@ class TestProcessingDepartmentWorkflow:
         item.refresh_from_db()
         assert item.execution_status == ProcurementItemExecutionStatus.RECEIVED
         assert item.received_quantity == item.quantity
+        actions = set(
+            processing_request.activities.values_list("action", flat=True)
+        )
+        assert ProcurementActivityAction.ITEM_UPDATED in actions
+        assert ProcurementActivityAction.ALL_ITEMS_RECEIVED in actions
+
+    def test_filling_execution_automatically_starts_request(
+        self, api_client, supply_user, processing_request,
+        procurement_item_factory
+    ):
+        item = procurement_item_factory(
+            request=processing_request,
+            quantity=3,
+        )
+        api_client.force_authenticate(user=supply_user)
+        item_url = reverse(
+            'api:v1:procurement:procurementitem-detail',
+            kwargs={'pk': item.id},
+        )
+
+        response = api_client.patch(
+            item_url,
+            {
+                'actual_unit_price': '125.00',
+                'ordered_quantity': 1,
+            },
+            format='json',
+        )
+
+        assert response.status_code == status.HTTP_200_OK
+        processing_request.refresh_from_db()
+        assert processing_request.status == ProcurementStatus.IN_PROGRESS
+        assert processing_request.executor == supply_user
+        assert processing_request.started_at is not None
+        item_activity = processing_request.activities.filter(
+            action=ProcurementActivityAction.ITEM_UPDATED,
+            object_id=item.id,
+        ).latest("created_at")
+        assert item_activity.actor == supply_user
+        assert set(item_activity.metadata["fields"]) == {
+            "actual_unit_price",
+            "execution_status",
+            "ordered_quantity",
+        }
+
+    def test_later_execution_updates_keep_original_start_date(
+        self, api_client, supply_user, processing_request,
+        procurement_item_factory
+    ):
+        item = procurement_item_factory(
+            request=processing_request,
+            quantity=3,
+        )
+        original_started_at = timezone.now() - timedelta(days=2)
+        processing_request.status = ProcurementStatus.IN_PROGRESS
+        processing_request.executor = supply_user
+        processing_request.started_at = original_started_at
+        processing_request.save(
+            update_fields=[
+                'status',
+                'executor',
+                'started_at',
+                'updated_at',
+            ]
+        )
+        api_client.force_authenticate(user=supply_user)
+
+        response = api_client.patch(
+            reverse(
+                'api:v1:procurement:procurementitem-detail',
+                kwargs={'pk': item.id},
+            ),
+            {'ordered_quantity': 2},
+            format='json',
+        )
+
+        assert response.status_code == status.HTTP_200_OK
+        processing_request.refresh_from_db()
+        assert processing_request.started_at == original_started_at
+
+    def test_regular_item_edit_does_not_start_request(
+        self, api_client, user, processing_request,
+        procurement_item_factory
+    ):
+        item = procurement_item_factory(
+            request=processing_request,
+            name='Исходное название',
+        )
+        api_client.force_authenticate(user=user)
+
+        response = api_client.patch(
+            reverse(
+                'api:v1:procurement:procurementitem-detail',
+                kwargs={'pk': item.id},
+            ),
+            {'name': 'Уточнённое название'},
+            format='json',
+        )
+
+        assert response.status_code == status.HTTP_200_OK
+        processing_request.refresh_from_db()
+        assert processing_request.status == ProcurementStatus.WAITING
+        assert processing_request.executor is None
+        assert processing_request.started_at is None
 
     def test_author_can_edit_waiting_request_with_items_before_work(
         self, api_client, user, department, supply_department,
diff --git a/backend/tests/api/v1/tasks/test_tasks_api.py b/backend/tests/api/v1/tasks/test_tasks_api.py
index 94db8d30..73782908 100644
--- a/backend/tests/api/v1/tasks/test_tasks_api.py
+++ b/backend/tests/api/v1/tasks/test_tasks_api.py
@@ -4,6 +4,7 @@ from datetime import date, timedelta
 import pytest
 from django.contrib.auth import get_user_model
 from django.contrib.contenttypes.models import ContentType
+from django.core.files.uploadedfile import SimpleUploadedFile
 from django.urls import reverse
 from django.utils import timezone
 from rest_framework import status
@@ -19,7 +20,15 @@ from procurement.constants import ProcurementStatus, UrgencyLevel
 from procurement.models import ProcurementRequest
 from requests_app.models import Request as EmployeeRequest
 from schedule.models import Calendar, CalendarRelation, Event
-from tasks.models import Task, TaskBoard, TaskColumn, TaskUserSettings
+from tasks.models import (
+    Task,
+    TaskAttachment,
+    TaskBoard,
+    TaskChecklistItem,
+    TaskColumn,
+    TaskExternalLink,
+    TaskUserSettings,
+)
 from tasks.realtime import get_task_board_recipient_ids
 
 pytestmark = pytest.mark.django_db
@@ -180,6 +189,182 @@ def test_create_task_and_move_to_done_column(api_client, user):
     assert task.completed_at is not None
 
 
+def test_member_can_claim_unassigned_task(api_client, user):
+    claimant = make_user("task-claimant@example.com", "+79994440095")
+    other_member = make_user("task-claim-other@example.com", "+79994440096")
+    board = TaskBoard.objects.create(name="Доска самоназначения", created_by=user)
+    board.members.add(claimant, other_member)
+    source_column = TaskColumn.objects.create(
+        board=board,
+        name="Новые",
+        position=1000,
+    )
+    done_column = TaskColumn.objects.create(
+        board=board,
+        name="Готово",
+        position=2000,
+        is_done=True,
+    )
+    task = Task.objects.create(
+        board=board,
+        column=source_column,
+        title="Свободная задача",
+        created_by=user,
+    )
+    claim_url = reverse("api:v1:tasks:task-claim", kwargs={"pk": task.id})
+
+    api_client.force_authenticate(user=claimant)
+    with (
+        patch("api.v1.tasks.views.notify_task_updated") as notify_updated,
+        patch("api.v1.tasks.views.send_task_board_update") as send_update,
+    ):
+        claim_response = api_client.post(claim_url)
+
+    assert claim_response.status_code == status.HTTP_200_OK
+    assert claim_response.data["assignee"]["id"] == claimant.id
+    assert claim_response.data["column"] == source_column.id
+    task.refresh_from_db()
+    assert task.assignee_id == claimant.id
+    assert task.column_id == source_column.id
+    claimed_activity = task.activities.get(action="claimed")
+    assert claimed_activity.actor_id == claimant.id
+    assert claimed_activity.metadata == {"assignee_id": claimant.id}
+    notify_updated.assert_called_once()
+    send_update.assert_called_once()
+    send_args, send_kwargs = send_update.call_args
+    assert send_args[1:4] == ("claimed", "task", task.id)
+    assert send_kwargs["extra"] == {"assignee_id": claimant.id}
+
+    with (
+        patch("api.v1.tasks.views.notify_task_updated") as notify_updated,
+        patch("api.v1.tasks.views.send_task_board_update") as send_update,
+    ):
+        repeated_response = api_client.post(claim_url)
+
+    assert repeated_response.status_code == status.HTTP_200_OK
+    assert task.activities.filter(action="claimed").count() == 1
+    notify_updated.assert_not_called()
+    send_update.assert_not_called()
+
+    api_client.force_authenticate(user=other_member)
+    conflict_response = api_client.post(claim_url)
+    assert conflict_response.status_code == status.HTTP_409_CONFLICT
+    assert conflict_response.data["detail"] == "У задачи уже есть исполнитель."
+    task.refresh_from_db()
+    assert task.assignee_id == claimant.id
+
+    completed_task = Task.objects.create(
+        board=board,
+        column=done_column,
+        title="Завершённая задача",
+        created_by=user,
+    )
+    completed_response = api_client.post(
+        reverse("api:v1:tasks:task-claim", kwargs={"pk": completed_task.id})
+    )
+    assert completed_response.status_code == status.HTTP_400_BAD_REQUEST
+    assert completed_response.data["detail"] == "Нельзя взять в работу завершённую задачу."
+    completed_task.refresh_from_db()
+    assert completed_task.assignee_id is None
+
+
+def test_only_assignee_can_complete_task_in_first_done_column(api_client, user):
+    assignee = make_user("task-assignee@example.com", "+79994440093")
+    member = make_user("task-member@example.com", "+79994440094")
+    board = TaskBoard.objects.create(name="Доска завершения", created_by=user)
+    board.members.add(assignee, member)
+    source_column = TaskColumn.objects.create(
+        board=board,
+        name="В работе",
+        position=1000,
+    )
+    first_done_column = TaskColumn.objects.create(
+        board=board,
+        name="Готово",
+        position=2000,
+        is_done=True,
+    )
+    TaskColumn.objects.create(
+        board=board,
+        name="Архив завершенных",
+        position=3000,
+        is_done=True,
+    )
+    task = Task.objects.create(
+        board=board,
+        column=source_column,
+        title="Завершить исполнителем",
+        created_by=user,
+        assignee=assignee,
+    )
+    complete_url = reverse("api:v1:tasks:task-complete", kwargs={"pk": task.id})
+
+    api_client.force_authenticate(user=member)
+    forbidden_response = api_client.post(complete_url)
+    assert forbidden_response.status_code == status.HTTP_403_FORBIDDEN
+    task.refresh_from_db()
+    assert task.column_id == source_column.id
+    assert task.completed_at is None
+
+    api_client.force_authenticate(user=assignee)
+    with (
+        patch("api.v1.tasks.views.notify_task_moved") as notify_moved,
+        patch("api.v1.tasks.views.send_task_board_update") as send_update,
+    ):
+        complete_response = api_client.post(complete_url)
+
+    assert complete_response.status_code == status.HTTP_200_OK
+    assert complete_response.data["column"] == first_done_column.id
+    assert complete_response.data["completed_at"] is not None
+    task.refresh_from_db()
+    assert task.column_id == first_done_column.id
+    assert task.completed_at is not None
+    moved_activity = task.activities.get(action="moved")
+    assert moved_activity.actor_id == assignee.id
+    assert moved_activity.metadata == {
+        "from_column_id": source_column.id,
+        "from_column": source_column.name,
+        "to_column_id": first_done_column.id,
+        "to_column": first_done_column.name,
+    }
+    notify_moved.assert_called_once()
+    send_update.assert_called_once()
+
+    with (
+        patch("api.v1.tasks.views.notify_task_moved") as notify_moved,
+        patch("api.v1.tasks.views.send_task_board_update") as send_update,
+    ):
+        repeated_response = api_client.post(complete_url)
+
+    assert repeated_response.status_code == status.HTTP_200_OK
+    assert task.activities.filter(action="moved").count() == 1
+    notify_moved.assert_not_called()
+    send_update.assert_not_called()
+
+
+def test_assignee_cannot_complete_task_without_done_column(api_client, user):
+    board = TaskBoard.objects.create(name="Доска без финала", created_by=user)
+    column = TaskColumn.objects.create(board=board, name="В работе", position=1000)
+    task = Task.objects.create(
+        board=board,
+        column=column,
+        title="Некуда завершать",
+        created_by=user,
+        assignee=user,
+    )
+    api_client.force_authenticate(user=user)
+
+    response = api_client.post(
+        reverse("api:v1:tasks:task-complete", kwargs={"pk": task.id})
+    )
+
+    assert response.status_code == status.HTTP_400_BAD_REQUEST
+    assert response.data["detail"] == "На доске не настроена завершающая колонка."
+    task.refresh_from_db()
+    assert task.column_id == column.id
+    assert task.completed_at is None
+
+
 def test_task_rejects_column_from_another_board(api_client, user):
     api_client.force_authenticate(user=user)
     first = api_client.get(reverse("api:v1:tasks:task-board-default")).data
@@ -207,6 +392,308 @@ def test_task_rejects_column_from_another_board(api_client, user):
     assert "column" in response.data
 
 
+def test_task_attachments_follow_board_access_and_support_full_lifecycle(
+    api_client,
+    user,
+    tmp_path,
+    settings,
+    django_capture_on_commit_callbacks,
+):
+    settings.MEDIA_ROOT = tmp_path
+    member = make_user("task-file-member@example.com", "+79994440101")
+    outsider = make_user("task-file-outsider@example.com", "+79994440102")
+    board = TaskBoard.objects.create(name="Доска с файлами", created_by=user)
+    board.members.add(member)
+    column = TaskColumn.objects.create(board=board, name="Новые", position=1000)
+    task = Task.objects.create(
+        board=board,
+        column=column,
+        title="Задача с файлами",
+        created_by=user,
+    )
+    attachments_url = reverse(
+        "api:v1:tasks:task-attachments",
+        kwargs={"pk": task.id},
+    )
+
+    api_client.force_authenticate(user=member)
+    upload_response = api_client.post(
+        attachments_url,
+        {
+            "files": [
+                SimpleUploadedFile(
+                    "brief.txt",
+                    b"task brief",
+                    content_type="text/plain",
+                ),
+                SimpleUploadedFile(
+                    "report.pdf",
+                    b"pdf content",
+                    content_type="application/pdf",
+                ),
+                SimpleUploadedFile(
+                    "logs.tar.gz",
+                    b"archive content",
+                    content_type="application/gzip",
+                ),
+            ]
+        },
+        format="multipart",
+    )
+
+    assert upload_response.status_code == status.HTTP_201_CREATED
+    assert [item["file_name"] for item in upload_response.data] == [
+        "brief.txt",
+        "report.pdf",
+        "logs.tar.gz",
+    ]
+    assert all(item["uploaded_by"]["id"] == member.id for item in upload_response.data)
+    assert TaskAttachment.objects.filter(task=task).count() == 3
+
+    task_response = api_client.get(
+        reverse("api:v1:tasks:task-detail", kwargs={"pk": task.id})
+    )
+    assert task_response.status_code == status.HTTP_200_OK
+    assert task_response.data["attachments_count"] == 3
+
+    attachment = TaskAttachment.objects.get(task=task, file_name="brief.txt")
+    stored_name = attachment.file.name
+    download_url = reverse(
+        "api:v1:tasks:task-attachment-download",
+        kwargs={"pk": task.id, "attachment_id": attachment.id},
+    )
+    download_response = api_client.get(download_url)
+    assert download_response.status_code == status.HTTP_200_OK
+    assert b"".join(download_response.streaming_content) == b"task brief"
+    assert download_response["X-Content-Type-Options"] == "nosniff"
+    assert "attachment" in download_response["Content-Disposition"]
+
+    api_client.force_authenticate(user=outsider)
+    assert api_client.get(attachments_url).status_code == status.HTTP_404_NOT_FOUND
+    assert api_client.get(download_url).status_code == status.HTTP_404_NOT_FOUND
+
+    api_client.force_authenticate(user=member)
+    delete_url = reverse(
+        "api:v1:tasks:task-attachment-detail",
+        kwargs={"pk": task.id, "attachment_id": attachment.id},
+    )
+    with django_capture_on_commit_callbacks(execute=True):
+        delete_response = api_client.delete(delete_url)
+
+    assert delete_response.status_code == status.HTTP_204_NO_CONTENT
+    assert not TaskAttachment.objects.filter(id=attachment.id).exists()
+    assert not attachment.file.storage.exists(stored_name)
+
+
+def test_task_attachment_has_no_size_limit(
+    api_client,
+    user,
+    settings,
+):
+    settings.TASK_ATTACHMENT_MAX_SIZE = 4
+    board = TaskBoard.objects.create(name="Доска лимитов", created_by=user)
+    column = TaskColumn.objects.create(board=board, name="Новые", position=1000)
+    task = Task.objects.create(
+        board=board,
+        column=column,
+        title="Проверить лимит файла",
+        created_by=user,
+    )
+    api_client.force_authenticate(user=user)
+
+    response = api_client.post(
+        reverse("api:v1:tasks:task-attachments", kwargs={"pk": task.id}),
+        {
+            "files": SimpleUploadedFile(
+                "large.txt",
+                b"12345",
+                content_type="text/plain",
+            )
+        },
+        format="multipart",
+    )
+
+    assert response.status_code == status.HTTP_201_CREATED
+    assert TaskAttachment.objects.filter(task=task, file_name="large.txt").exists()
+
+
+def test_task_external_links_follow_board_access_and_support_lifecycle(
+    api_client,
+    user,
+):
+    member = make_user("task-link-member@example.com", "+79994440103")
+    outsider = make_user("task-link-outsider@example.com", "+79994440104")
+    board = TaskBoard.objects.create(name="Доска со ссылками", created_by=user)
+    board.members.add(member)
+    column = TaskColumn.objects.create(board=board, name="Новые", position=1000)
+    task = Task.objects.create(
+        board=board,
+        column=column,
+        title="Задача со ссылкой",
+        created_by=user,
+    )
+    links_url = reverse(
+        "api:v1:tasks:task-external-links",
+        kwargs={"pk": task.id},
+    )
+
+    api_client.force_authenticate(user=member)
+    invalid_response = api_client.post(
+        links_url,
+        {"url": "javascript:alert(1)", "title": "Опасная ссылка"},
+        format="json",
+    )
+    assert invalid_response.status_code == status.HTTP_400_BAD_REQUEST
+
+    create_response = api_client.post(
+        links_url,
+        {"url": "https://example.com/service/item/42", "title": "Карточка сервиса"},
+        format="json",
+    )
+    assert create_response.status_code == status.HTTP_201_CREATED
+    assert create_response.data["title"] == "Карточка сервиса"
+    assert create_response.data["created_by"]["id"] == member.id
+    link_id = create_response.data["id"]
+    assert TaskExternalLink.objects.filter(task=task).count() == 1
+
+    duplicate_response = api_client.post(
+        links_url,
+        {"url": "https://example.com/service/item/42", "title": "Обновленное название"},
+        format="json",
+    )
+    assert duplicate_response.status_code == status.HTTP_200_OK
+    assert duplicate_response.data["title"] == "Обновленное название"
+    assert TaskExternalLink.objects.filter(task=task).count() == 1
+
+    task_response = api_client.get(
+        reverse("api:v1:tasks:task-detail", kwargs={"pk": task.id})
+    )
+    assert task_response.status_code == status.HTTP_200_OK
+    assert task_response.data["linked_objects_count"] == 1
+
+    api_client.force_authenticate(user=outsider)
+    assert api_client.get(links_url).status_code == status.HTTP_404_NOT_FOUND
+
+    api_client.force_authenticate(user=member)
+    delete_response = api_client.delete(
+        reverse(
+            "api:v1:tasks:task-external-link-detail",
+            kwargs={"pk": task.id, "link_id": link_id},
+        )
+    )
+    assert delete_response.status_code == status.HTTP_204_NO_CONTENT
+    assert not TaskExternalLink.objects.filter(id=link_id).exists()
+
+
+def test_task_checklist_follows_board_access_and_supports_full_lifecycle(
+    api_client,
+):
+    owner = make_user("task-checklist-owner@example.com", "+79994440105")
+    member = make_user("task-checklist-member@example.com", "+79994440106")
+    outsider = make_user("task-checklist-outsider@example.com", "+79994440107")
+    board = TaskBoard.objects.create(name="Доска с чек-листом", created_by=owner)
+    board.members.add(member)
+    column = TaskColumn.objects.create(board=board, name="Новые", position=1000)
+    task = Task.objects.create(
+        board=board,
+        column=column,
+        title="Подготовить релиз",
+        created_by=owner,
+    )
+    checklist_url = reverse(
+        "api:v1:tasks:task-checklist",
+        kwargs={"pk": task.id},
+    )
+
+    api_client.force_authenticate(user=member)
+    invalid_response = api_client.post(
+        checklist_url,
+        {"title": "   "},
+        format="json",
+    )
+    assert invalid_response.status_code == status.HTTP_400_BAD_REQUEST
+
+    first_response = api_client.post(
+        checklist_url,
+        {"title": "  Проверить миграции  "},
+        format="json",
+    )
+    second_response = api_client.post(
+        checklist_url,
+        {"title": "Обновить документацию"},
+        format="json",
+    )
+    assert first_response.status_code == status.HTTP_201_CREATED
+    assert second_response.status_code == status.HTTP_201_CREATED
+    assert first_response.data["title"] == "Проверить миграции"
+    assert first_response.data["position"] == 1000
+    assert second_response.data["position"] == 2000
+    assert first_response.data["created_by"]["id"] == member.id
+
+    item_id = first_response.data["id"]
+    item_url = reverse(
+        "api:v1:tasks:task-checklist-item-detail",
+        kwargs={"pk": task.id, "item_id": item_id},
+    )
+    complete_response = api_client.patch(
+        item_url,
+        {"is_completed": True},
+        format="json",
+    )
+    assert complete_response.status_code == status.HTTP_200_OK
+    assert complete_response.data["is_completed"] is True
+    assert complete_response.data["completed_by"]["id"] == member.id
+    assert complete_response.data["completed_at"] is not None
+
+    completed_at = complete_response.data["completed_at"]
+    rename_response = api_client.patch(
+        item_url,
+        {"title": "Проверить миграции на стенде"},
+        format="json",
+    )
+    assert rename_response.status_code == status.HTTP_200_OK
+    assert rename_response.data["title"] == "Проверить миграции на стенде"
+    assert rename_response.data["completed_by"]["id"] == member.id
+    assert rename_response.data["completed_at"] == completed_at
+
+    list_response = api_client.get(checklist_url)
+    assert list_response.status_code == status.HTTP_200_OK
+    assert [item["title"] for item in list_response.data] == [
+        "Проверить миграции на стенде",
+        "Обновить документацию",
+    ]
+
+    detail_response = api_client.get(
+        reverse("api:v1:tasks:task-detail", kwargs={"pk": task.id})
+    )
+    assert detail_response.status_code == status.HTTP_200_OK
+    assert detail_response.data["checklist_total"] == 2
+    assert detail_response.data["checklist_completed"] == 1
+
+    api_client.force_authenticate(user=outsider)
+    assert api_client.get(checklist_url).status_code == status.HTTP_404_NOT_FOUND
+    assert (
+        api_client.patch(item_url, {"is_completed": False}, format="json").status_code
+        == status.HTTP_404_NOT_FOUND
+    )
+
+    api_client.force_authenticate(user=member)
+    delete_response = api_client.delete(item_url)
+    assert delete_response.status_code == status.HTTP_204_NO_CONTENT
+    assert not TaskChecklistItem.objects.filter(id=item_id).exists()
+
+    activity_response = api_client.get(
+        reverse("api:v1:tasks:task-activity", kwargs={"pk": task.id})
+    )
+    assert activity_response.status_code == status.HTTP_200_OK
+    assert {
+        "checklist_item_added",
+        "checklist_item_completed",
+        "checklist_item_updated",
+        "checklist_item_removed",
+    }.issubset({item["action"] for item in activity_response.data})
+
+
 def test_create_board_accepts_members_and_departments(api_client, user):
     member = make_user("task-member@example.com", "+79994440002")
     department = Department.objects.create(name="Проектный отдел")
@@ -224,6 +711,7 @@ def test_create_board_accepts_members_and_departments(api_client, user):
     )
 
     assert response.status_code == status.HTTP_201_CREATED
+    assert response.data["access_scope"] == "restricted"
     assert response.data["members"] == [member.id]
     assert response.data["member_details"][0]["id"] == member.id
     assert response.data["departments"] == [department.id]
@@ -231,6 +719,61 @@ def test_create_board_accepts_members_and_departments(api_client, user):
     assert TaskColumn.objects.filter(board_id=response.data["id"]).count() == 4
 
 
+def test_private_board_is_available_only_to_owner_and_admin(api_client):
+    owner = make_user("task-private-owner@example.com", "+79994440901")
+    selected_member = make_user("task-private-member@example.com", "+79994440902")
+    department_member = make_user("task-private-dept@example.com", "+79994440903")
+    outsider = make_user("task-private-outsider@example.com", "+79994440904")
+    admin = make_user(
+        "task-private-admin@example.com",
+        "+79994440905",
+        is_staff=True,
+    )
+    department = Department.objects.create(name="Приватный отдел")
+    EmployeeDepartment.objects.create(
+        employee=department_member,
+        department=department,
+        is_active=True,
+    )
+    api_client.force_authenticate(user=owner)
+
+    create_response = api_client.post(
+        reverse("api:v1:tasks:task-board-list"),
+        {
+            "name": "Личная доска",
+            "access_scope": "private",
+            "members": [selected_member.id],
+            "departments": [department.id],
+        },
+        format="json",
+    )
+
+    assert create_response.status_code == status.HTTP_201_CREATED
+    assert create_response.data["access_scope"] == "private"
+    assert create_response.data["members"] == []
+    assert create_response.data["departments"] == []
+    board = TaskBoard.objects.get(id=create_response.data["id"])
+    assert get_task_board_recipient_ids(board) == {owner.id, admin.id}
+
+    for hidden_user in (selected_member, department_member, outsider):
+        api_client.force_authenticate(user=hidden_user)
+        list_response = api_client.get(reverse("api:v1:tasks:task-board-list"))
+        assert list_response.status_code == status.HTTP_200_OK
+        assert board.id not in {
+            item["id"] for item in list_response.data["results"]
+        }
+        detail_response = api_client.get(
+            reverse("api:v1:tasks:task-board-detail", kwargs={"pk": board.id})
+        )
+        assert detail_response.status_code == status.HTTP_404_NOT_FOUND
+
+    api_client.force_authenticate(user=admin)
+    admin_response = api_client.get(
+        reverse("api:v1:tasks:task-board-detail", kwargs={"pk": board.id})
+    )
+    assert admin_response.status_code == status.HTTP_200_OK
+
+
 def test_board_member_can_access_private_board(api_client):
     owner = make_user("task-owner@example.com", "+79994440003")
     member = make_user("task-member-2@example.com", "+79994440004")
@@ -1256,14 +1799,65 @@ def test_task_comments_use_communications_and_update_count(api_client, user):
     message = Message.objects.get(chat=chat)
     assert message.content == "Нужно уточнить детали"
     assert message.author == user
+    added_activity = task.activities.get(action="comment_added")
+    assert added_activity.actor == user
+    assert added_activity.object_kind == "comment"
+    assert added_activity.object_id == message.id
+    assert added_activity.metadata == {"comment_text": "Нужно уточнить детали"}
+
+    comment_detail_url = reverse(
+        "api:v1:tasks:task-delete-comment",
+        kwargs={"pk": task.id, "comment_id": message.id},
+    )
+    other_user = make_user("task-comment-editor@example.com", "+79994440027")
+    api_client.force_authenticate(user=other_user)
+    forbidden_edit_response = api_client.patch(
+        comment_detail_url,
+        {"text": "Чужое изменение"},
+        format="json",
+    )
+    assert forbidden_edit_response.status_code == status.HTTP_403_FORBIDDEN
+
+    api_client.force_authenticate(user=user)
+    empty_edit_response = api_client.patch(
+        comment_detail_url,
+        {"text": ""},
+        format="json",
+    )
+    assert empty_edit_response.status_code == status.HTTP_400_BAD_REQUEST
+
+    edit_response = api_client.patch(
+        comment_detail_url,
+        {"text": "Детали уже уточнены"},
+        format="json",
+    )
+    assert edit_response.status_code == status.HTTP_200_OK
+    assert edit_response.data["text"] == "Детали уже уточнены"
+    assert edit_response.data["is_edited"] is True
+    assert edit_response.data["edited_at"] is not None
+
+    message.refresh_from_db()
+    assert message.content == "Детали уже уточнены"
+    edit_history = message.edit_history_records.get()
+    assert edit_history.previous_content == "Нужно уточнить детали"
+    assert edit_history.edited_by == user
+    edited_activity = task.activities.get(action="comment_edited")
+    assert edited_activity.actor == user
+    assert edited_activity.object_kind == "comment"
+    assert edited_activity.object_id == message.id
+    assert edited_activity.metadata == {
+        "previous_text": "Нужно уточнить детали",
+        "comment_text": "Детали уже уточнены",
+    }
 
     list_response = api_client.get(
         reverse("api:v1:tasks:task-comments", kwargs={"pk": task.id})
     )
     assert list_response.status_code == status.HTTP_200_OK
     assert [comment["text"] for comment in list_response.data] == [
-        "Нужно уточнить детали"
+        "Детали уже уточнены"
     ]
+    assert list_response.data[0]["is_edited"] is True
 
     detail_response = api_client.get(
         reverse("api:v1:tasks:task-detail", kwargs={"pk": task.id})
@@ -1271,14 +1865,26 @@ def test_task_comments_use_communications_and_update_count(api_client, user):
     assert detail_response.data["comments_count"] == 1
 
     delete_response = api_client.delete(
-        reverse(
-            "api:v1:tasks:task-delete-comment",
-            kwargs={"pk": task.id, "comment_id": message.id},
-        )
+        comment_detail_url
     )
     assert delete_response.status_code == status.HTTP_204_NO_CONTENT
     message.refresh_from_db()
     assert message.is_deleted is True
+    removed_activity = task.activities.get(action="comment_removed")
+    assert removed_activity.actor == user
+    assert removed_activity.object_kind == "comment"
+    assert removed_activity.object_id == message.id
+    assert removed_activity.metadata == {"comment_text": "Детали уже уточнены"}
+
+    activity_response = api_client.get(
+        reverse("api:v1:tasks:task-activity", kwargs={"pk": task.id})
+    )
+    assert activity_response.status_code == status.HTTP_200_OK
+    assert [item["action"] for item in activity_response.data] == [
+        "comment_removed",
+        "comment_edited",
+        "comment_added",
+    ]
 
     assert api_client.get(
         reverse("api:v1:tasks:task-comments", kwargs={"pk": task.id})
diff --git a/backend/tests/employees/test_ldap_avatar_processing.py b/backend/tests/employees/test_ldap_avatar_processing.py
new file mode 100644
index 00000000..47879c1a
--- /dev/null
+++ b/backend/tests/employees/test_ldap_avatar_processing.py
@@ -0,0 +1,34 @@
+import io
+import random
+
+from PIL import Image
+
+from employees.ldap.utils.image_utils import normalize_avatar_to_jpeg
+
+
+def _noisy_png(size: int = 768) -> bytes:
+    pixels = random.Random(42).randbytes(size * size * 3)
+    image = Image.frombytes("RGB", (size, size), pixels)
+    output = io.BytesIO()
+    image.save(output, format="PNG")
+    return output.getvalue()
+
+
+def test_normalize_avatar_enforces_ldap_byte_limit():
+    result = normalize_avatar_to_jpeg(_noisy_png(), size_px=384, max_kb=100)
+
+    assert len(result) <= 100 * 1024
+
+    image = Image.open(io.BytesIO(result))
+    assert image.format == "JPEG"
+    assert image.width <= 384
+    assert image.height <= 384
+
+
+def test_normalize_avatar_rejects_invalid_output_limit():
+    try:
+        normalize_avatar_to_jpeg(b"image", max_kb=0)
+    except ValueError as exc:
+        assert "лимит размера" in str(exc)
+    else:
+        raise AssertionError("Ожидалась ошибка для нулевого лимита")
diff --git a/frontend/src/app/documents/page.tsx b/frontend/src/app/documents/page.tsx
index 83ed1346..47bd210e 100644
--- a/frontend/src/app/documents/page.tsx
+++ b/frontend/src/app/documents/page.tsx
@@ -40,6 +40,7 @@ import { BulkActionsToolbar, useDocumentSelection } from "@/components/documents
 import { TagManagementModal } from "@/components/documents/tags";
 import TaskLinkPill from "@/components/tasks/TaskLinkPill";
 import { Modal } from "@/components/ui";
+import { canPreviewDocument, getDocumentFileExtension } from "@/lib/document-preview";
 
 // Динамический импорт компонентов с PDF обработкой (избегаем SSR ошибок с DOMMatrix)
 const DocumentUploadForm = dynamic(
@@ -68,99 +69,6 @@ function formatDate(value?: string): string {
   });
 }
 
-const DOCUMENT_PREVIEW_EXTENSIONS = new Set([
-  "pdf",
-  "jpg",
-  "jpeg",
-  "png",
-  "gif",
-  "webp",
-  "svg",
-  "bmp",
-  "ico",
-  "avif",
-  "docx",
-  "xls",
-  "xlsx",
-  "xlsm",
-  "xlsb",
-  "ods",
-  "csv",
-  "tsv",
-  "txt",
-  "text",
-  "md",
-  "markdown",
-  "json",
-  "xml",
-  "html",
-  "htm",
-  "css",
-  "scss",
-  "sass",
-  "less",
-  "js",
-  "jsx",
-  "ts",
-  "tsx",
-  "mjs",
-  "cjs",
-  "yml",
-  "yaml",
-  "ini",
-  "conf",
-  "cfg",
-  "log",
-  "sql",
-  "py",
-  "java",
-  "c",
-  "cpp",
-  "h",
-  "hpp",
-  "cs",
-  "go",
-  "rs",
-  "php",
-  "rb",
-  "kt",
-  "kts",
-  "swift",
-  "sh",
-  "bash",
-  "zsh",
-  "ps1",
-  "bat",
-  "cmd",
-  "properties",
-  "env",
-  "rtf",
-  "mp4",
-  "webm",
-  "ogg",
-  "ogv",
-  "mov",
-  "m4v",
-  "mp3",
-  "wav",
-  "oga",
-  "m4a",
-  "aac",
-  "flac",
-]);
-const DOCUMENT_PREVIEW_FILE_NAMES = new Set(["dockerfile", "makefile", "readme", "license", ".gitignore", ".env"]);
-
-function getDocumentFileExtension(fileName?: string | null): string {
-  const cleanName = (fileName || "").toLowerCase().split("?")[0].split("#")[0];
-  return cleanName.match(/\.([^.]+)$/)?.[1] || "";
-}
-
-function canPreviewDocument(fileName?: string | null): boolean {
-  const lowerName = (fileName || "").toLowerCase();
-  const extension = getDocumentFileExtension(fileName);
-  return DOCUMENT_PREVIEW_EXTENSIONS.has(extension) || DOCUMENT_PREVIEW_FILE_NAMES.has(lowerName);
-}
-
 function formatFileSize(value?: number): string {
   if (!value || value <= 0) return "";
   if (value < 1024) return `${value} Б`;
@@ -1322,6 +1230,8 @@ function DocumentsPageContent() {
                           const departmentsCount = doc.departments?.length || 0;
                           const hasPreview = Boolean(doc.file_url && canPreviewDocument(doc.file_name || doc.title));
                           const isAcknowledging = acknowledgingDocumentId === doc.id;
+                          const acknowledgementRequiredForUser =
+                            doc.acknowledgement_required_for_user ?? doc.acknowledgement_required;
 
                           // DEBUG: Проверка данных документа
                           if (!authorName || !createdDate) {
@@ -1434,7 +1344,7 @@ function DocumentsPageContent() {
 
                                       <div className="flex shrink-0 items-start gap-2">
                                         <div className="text-right">
-                                          {doc.acknowledgement_required ? (
+                                          {acknowledgementRequiredForUser ? (
                                             doc.is_acknowledged ? (
                                               <span className="app-feedback-success inline-flex rounded-full px-2.5 py-1 text-xs font-medium">
                                                 Ознакомлен
@@ -1538,7 +1448,7 @@ function DocumentsPageContent() {
                                                 </button>
                                               )}
 
-                                              {doc.acknowledgement_required && !doc.is_acknowledged && (
+                                              {acknowledgementRequiredForUser && !doc.is_acknowledged && (
                                                 <button
                                                   type="button"
                                                   onClick={() => void handleAcknowledgeDocument(doc)}
@@ -1546,7 +1456,7 @@ function DocumentsPageContent() {
                                                   className="flex w-full items-center gap-2 px-3 py-2 text-left text-sm text-[var(--foreground)] transition hover:bg-[var(--surface-secondary)]"
                                                 >
                                                   {isAcknowledging ? <Loader2 size={14} className="animate-spin" /> : <CheckCircle size={14} />}
-                                                  {isAcknowledging ? "Подтверждение..." : "Ознакомиться"}
+                                                  {isAcknowledging ? "Подтверждение..." : "Ознакомился(лась)"}
                                                 </button>
                                               )}
 
@@ -1641,7 +1551,7 @@ function DocumentsPageContent() {
                                     )}
 
                                     <div className="mt-3 flex flex-wrap items-center justify-end gap-1.5">
-                                      {doc.acknowledgement_required && !doc.is_acknowledged ? (
+                                      {acknowledgementRequiredForUser && !doc.is_acknowledged ? (
                                         <button
                                           type="button"
                                           onClick={() => void handleAcknowledgeDocument(doc)}
@@ -1654,7 +1564,7 @@ function DocumentsPageContent() {
                                           ) : (
                                             <CheckCircle size={14} />
                                           )}
-                                          <span>{isAcknowledging ? "Подтверждение..." : "Ознакомиться"}</span>
+                                          <span>{isAcknowledging ? "Подтверждение..." : "Ознакомился(лась)"}</span>
                                         </button>
                                       ) : null}
 
@@ -1732,7 +1642,7 @@ function DocumentsPageContent() {
         isOpen={showUploadForm}
         onClose={() => setShowUploadForm(false)}
         title="Загрузить документ"
-        size="lg"
+        size="xl"
       >
         <DocumentUploadForm
           currentFolderId={selectedFolderId}
diff --git a/frontend/src/app/globals.css b/frontend/src/app/globals.css
index d8746a52..b79711e5 100644
--- a/frontend/src/app/globals.css
+++ b/frontend/src/app/globals.css
@@ -19,6 +19,8 @@
   --danger-soft: rgba(239, 68, 68, 0.12);
   --danger-foreground: #dc2626;
   --warning-soft: rgba(245, 158, 11, 0.15);
+  --regulation-border: #a9822f;
+  --regulation-soft: rgba(169, 130, 47, 0.1);
   --app-shell-gradient: radial-gradient(circle at top, rgba(125, 211, 252, 0.12), transparent 32%), linear-gradient(180deg, #f5f9ff 0%, #eef3fb 46%, #f4f7fb 100%);
   --header-surface: rgba(255, 255, 255, 0.84);
   --shadow-card: 0 12px 30px -22px rgba(15, 23, 42, 0.16), 0 3px 10px -8px rgba(15, 23, 42, 0.08);
@@ -51,6 +53,8 @@ html[data-bs-theme="dark"] {
   --danger-soft: rgba(239, 68, 68, 0.16);
   --danger-foreground: #f87171;
   --warning-soft: rgba(245, 158, 11, 0.18);
+  --regulation-border: #d0ad58;
+  --regulation-soft: rgba(208, 173, 88, 0.12);
   --app-shell-gradient: radial-gradient(circle at top, rgba(30, 167, 255, 0.08), transparent 24%), linear-gradient(180deg, #10161d 0%, #111922 38%, #0b1016 100%);
   --header-surface: rgba(14, 20, 28, 0.88);
   --shadow-card: 0 20px 48px -30px rgba(2, 6, 23, 0.72);
diff --git a/frontend/src/app/messages/[chatId]/settings/page.tsx b/frontend/src/app/messages/[chatId]/settings/page.tsx
index 7bb48730..f5c43cba 100644
--- a/frontend/src/app/messages/[chatId]/settings/page.tsx
+++ b/frontend/src/app/messages/[chatId]/settings/page.tsx
@@ -199,12 +199,6 @@ export default function ChatSettingsPage() {
     const file = e.target.files?.[0];
     if (!file) return;
 
-    // Проверка размера (макс 5MB)
-    if (file.size > 5 * 1024 * 1024) {
-      alert("Файл слишком большой. Максимальный размер: 5MB");
-      return;
-    }
-
     // Проверка типа
     if (!file.type.startsWith("image/")) {
       alert("Можно загружать только изображения");
diff --git a/frontend/src/app/messages/page.tsx b/frontend/src/app/messages/page.tsx
index ce25906a..d41a3124 100644
--- a/frontend/src/app/messages/page.tsx
+++ b/frontend/src/app/messages/page.tsx
@@ -389,10 +389,6 @@ export default function MessagesPage() {
   const handleAvatarChange = (e: React.ChangeEvent<HTMLInputElement>) => {
     const file = e.target.files?.[0];
     if (file) {
-      if (file.size > 5 * 1024 * 1024) { // 5MB
-        alert('Файл слишком большой. Максимум 5MB');
-        return;
-      }
       if (!file.type.startsWith('image/')) {
         alert('Можно загружать только изображения');
         return;
diff --git a/frontend/src/app/page.tsx b/frontend/src/app/page.tsx
index 033ff840..20ce6a4f 100644
--- a/frontend/src/app/page.tsx
+++ b/frontend/src/app/page.tsx
@@ -1,9 +1,15 @@
 "use client";
 
 import Link from "next/link";
-import { ChevronRight, Link2, Pencil, Pin, Plus, Trash2 } from "lucide-react";
+import dynamic from "next/dynamic";
+import { ChevronRight, Link2, Newspaper, Pencil, Pin, Plus, ScrollText, Trash2 } from "lucide-react";
 import { AppShell } from "../components/AppShell";
 import { FeedPostCard } from "@/components/feed/FeedPostCard";
+import { FeedRegulationCard } from "@/components/feed/FeedRegulationCard";
+import { DocumentAcknowledgementsReport } from "@/components/documents/DocumentAcknowledgementsReport";
+import { DocumentDetailModal } from "@/components/documents/DocumentDetailModal";
+import { DocumentMetadataEditor } from "@/components/documents/DocumentMetadataEditor";
+import { DocumentTaskLinks } from "@/components/documents/DocumentTaskLinks";
 import { Modal } from "@/components/ui";
 import { PostCommentsModal } from "@/components/feed/PostCommentsModal";
 import { RequestAvatar } from "@/components/requests/RequestAvatar";
@@ -11,12 +17,29 @@ import { RelatedTaskLinks } from "@/components/tasks/RelatedTaskLinks";
 import TaskLinkPill from "@/components/tasks/TaskLinkPill";
 import { useNotifications } from "@/contexts/NotificationsContext";
 import { apiClient } from "@/lib/api";
-import { userProfileLink } from "@/lib/shared";
+import { getDocumentFileExtension } from "@/lib/document-preview";
+import { loadAllPages, userProfileLink } from "@/lib/shared";
 import { resolveMediaUrl } from "@/lib/url";
 import { Suspense, useCallback, useEffect, useMemo, useRef, useState } from "react";
 import { usePathname, useRouter, useSearchParams } from "next/navigation";
-import type { Comment, Post } from "@/types/api";
+import type { Comment, Document, Post } from "@/types/api";
 import { useUser } from "@/contexts/UserContext";
+import { toast } from "sonner";
+
+const EnhancedPDFViewer = dynamic(
+  () => import("@/components/documents/viewer").then((mod) => ({ default: mod.EnhancedPDFViewer })),
+  { ssr: false },
+);
+
+const DocumentPreview = dynamic(
+  () => import("@/components/documents/DocumentPreview").then((mod) => ({ default: mod.DocumentPreview })),
+  { ssr: false },
+);
+
+const DocumentUploadForm = dynamic(
+  () => import("@/components/documents/DocumentUploadForm").then((mod) => ({ default: mod.DocumentUploadForm })),
+  { ssr: false },
+);
 
 type LikeUser = {
   id: number;
@@ -27,6 +50,24 @@ type LikeUser = {
 };
 
 type PostSourceFilter = "all" | "company" | `department:${number}`;
+type FeedFilterKey = PostSourceFilter | "regulations";
+
+type FeedEntry =
+  | { kind: "post"; post: Post; timestamp: string }
+  | { kind: "regulation"; document: Document; timestamp: string };
+
+function postMatchesSource(post: Post, source: PostSourceFilter) {
+  if (source === "all") return true;
+  if (source === "company") return post.type !== "department";
+  return post.department_id === Number(source.split(":")[1]);
+}
+
+function regulationMatchesSource(document: Document, source: PostSourceFilter) {
+  if (source === "all") return true;
+  if (source === "company") return Boolean(document.sent_to_all);
+  const departmentId = Number(source.split(":")[1]);
+  return (document.departments || []).some((department) => department.id === departmentId);
+}
 
 export default function Home() {
   return (
@@ -54,14 +95,29 @@ function HomePageContent() {
   const pathname = usePathname();
   const searchParams = useSearchParams();
   const [posts, setPosts] = useState<Post[]>([]);
+  const [regulations, setRegulations] = useState<Document[]>([]);
+  const [selectedRegulation, setSelectedRegulation] = useState<Document | null>(null);
+  const [selectedRegulationInitialTab, setSelectedRegulationInitialTab] = useState<"comments" | undefined>();
+  const [metadataRegulation, setMetadataRegulation] = useState<Document | null>(null);
+  const [taskLinkRegulation, setTaskLinkRegulation] = useState<Document | null>(null);
+  const [regulationPreviewFile, setRegulationPreviewFile] = useState<{ url: string; name: string } | null>(null);
+  const [regulationPdfFile, setRegulationPdfFile] = useState<{ url: string; name: string } | null>(null);
+  const [acknowledgingRegulationId, setAcknowledgingRegulationId] = useState<number | null>(null);
+  const [acknowledgementsReport, setAcknowledgementsReport] = useState<{
+    documentId: number;
+    documentTitle: string;
+  } | null>(null);
   const [loading, setLoading] = useState(true);
   const [error, setError] = useState<string | null>(null);
   const [likeBusyId, setLikeBusyId] = useState<number | null>(null);
   const [sourceFilter, setSourceFilter] = useState<PostSourceFilter>("all");
+  const [regulationsOnly, setRegulationsOnly] = useState(false);
 
   const [commentsOpen, setCommentsOpen] = useState(false);
   const [activePost, setActivePost] = useState<Post | null>(null);
   const [createPostOpen, setCreatePostOpen] = useState(false);
+  const [createRegulationOpen, setCreateRegulationOpen] = useState(false);
+  const [createMenuOpen, setCreateMenuOpen] = useState(false);
   const [createType, setCreateType] = useState<"company" | "department">("company");
   const [createDepartmentId, setCreateDepartmentId] = useState<string>("");
   const [createTitle, setCreateTitle] = useState("");
@@ -80,6 +136,7 @@ function HomePageContent() {
   const [postMenuOpenId, setPostMenuOpenId] = useState<number | null>(null);
   const [taskLinkPost, setTaskLinkPost] = useState<Post | null>(null);
   const postMenuRef = useRef<HTMLDivElement | null>(null);
+  const createMenuRef = useRef<HTMLDivElement | null>(null);
 
   const formatUserName = (u: LikeUser) => {
     const composed = `${u.last_name || ""} ${u.first_name || ""}`.trim();
@@ -228,6 +285,80 @@ function HomePageContent() {
     setPosts(sortPostsPinnedFirst(response.results));
   }, [sortPostsPinnedFirst]);
 
+  const refreshRegulations = useCallback(async () => {
+    const items = await loadAllPages<Document>((pagination) => (
+      apiClient.getDocuments({
+        ...pagination,
+        scope: "mine",
+        is_regulation: true,
+      })
+    ));
+    setRegulations(items);
+  }, []);
+
+  const handleAcknowledgeRegulation = async (documentItem: Document) => {
+    if (acknowledgingRegulationId !== null) return;
+
+    setAcknowledgingRegulationId(documentItem.id);
+    try {
+      await apiClient.acknowledgeDocument(documentItem.id);
+      setRegulations((current) => current.map((document) => (
+        document.id === documentItem.id ? { ...document, is_acknowledged: true } : document
+      )));
+      if (selectedRegulation?.id === documentItem.id) {
+        setSelectedRegulation({ ...selectedRegulation, is_acknowledged: true });
+      }
+      toast.success("Ознакомление подтверждено");
+      void refreshRegulations();
+    } catch (err) {
+      console.error("Ошибка подтверждения ознакомления:", err);
+      toast.error("Не удалось подтвердить ознакомление");
+    } finally {
+      setAcknowledgingRegulationId(null);
+    }
+  };
+
+  const openRegulation = (document: Document) => {
+    setSelectedRegulationInitialTab(undefined);
+    setSelectedRegulation(document);
+  };
+
+  const openRegulationComments = (document: Document) => {
+    setSelectedRegulationInitialTab("comments");
+    setSelectedRegulation(document);
+  };
+
+  const openRegulationPreview = (document: Document) => {
+    if (!document.file_url) return;
+
+    const previewFile = {
+      url: document.file_url,
+      name: document.file_name || document.title,
+    };
+    if (getDocumentFileExtension(previewFile.name) === "pdf") {
+      setRegulationPdfFile(previewFile);
+    } else {
+      setRegulationPreviewFile(previewFile);
+    }
+  };
+
+  const deleteRegulation = async (document: Document) => {
+    if (!window.confirm(`Удалить документ "${document.title}"?`)) return;
+
+    try {
+      await apiClient.deleteDocument(document.id);
+      setRegulations((current) => current.filter((item) => item.id !== document.id));
+      if (selectedRegulation?.id === document.id) {
+        setSelectedRegulation(null);
+        setSelectedRegulationInitialTab(undefined);
+      }
+      toast.success("Документ удалён");
+    } catch (err) {
+      console.error("Ошибка удаления документа:", err);
+      toast.error("Не удалось удалить документ");
+    }
+  };
+
   const postSourceCounts = useMemo(() => {
     const departmentCounts = new Map<number, { id: number; name: string; total: number }>();
     let companyCount = 0;
@@ -249,30 +380,72 @@ function HomePageContent() {
       }
     }
 
+    for (const document of regulations) {
+      if (document.sent_to_all) companyCount += 1;
+      for (const department of document.departments || []) {
+        const current = departmentCounts.get(department.id);
+        if (current) {
+          current.total += 1;
+        } else {
+          departmentCounts.set(department.id, {
+            id: department.id,
+            name: department.name,
+            total: 1,
+          });
+        }
+      }
+    }
+
     const departments = Array.from(departmentCounts.values()).sort((left, right) => {
       if (right.total !== left.total) return right.total - left.total;
       return left.name.localeCompare(right.name, "ru");
     });
 
     return {
-      all: posts.length,
+      all: posts.length + regulations.length,
       company: companyCount,
+      regulations: regulations.length,
       departments,
     };
-  }, [posts]);
+  }, [posts, regulations]);
 
   const postSourceUnreadCounts = useMemo(() => {
     const departmentUnread = new Map<number, number>();
     let companyUnread = 0;
+    let regulationsUnread = 0;
+    let companyRegulationsUnread = 0;
+    const departmentRegulationsUnread = new Map<number, number>();
+    const regulationsById = new Map(regulations.map((document) => [document.id, document]));
 
     for (const notification of notifications) {
-      if ((notification.verb || "") !== "feed_new_post") continue;
-
       const rawData = notification.data;
       const data = rawData && typeof rawData === "object"
         ? rawData as Record<string, unknown>
         : null;
 
+      if ((notification.verb || "") === "document_ready") {
+        const rawDocumentId = data?.document_id;
+        const documentId = typeof rawDocumentId === "number"
+          ? rawDocumentId
+          : typeof rawDocumentId === "string"
+            ? Number(rawDocumentId)
+            : null;
+        const regulation = documentId !== null ? regulationsById.get(documentId) : undefined;
+        if (regulation) {
+          regulationsUnread += 1;
+          if (regulation.sent_to_all) companyRegulationsUnread += 1;
+          for (const department of regulation.departments || []) {
+            departmentRegulationsUnread.set(
+              department.id,
+              (departmentRegulationsUnread.get(department.id) || 0) + 1,
+            );
+          }
+        }
+        continue;
+      }
+
+      if ((notification.verb || "") !== "feed_new_post") continue;
+
       const postType = typeof data?.post_type === "string" ? data.post_type : "";
       const departmentId =
         typeof data?.department_id === "number"
@@ -288,25 +461,43 @@ function HomePageContent() {
       }
     }
 
-    const departmentEntries = Array.from(departmentUnread.entries()).map(([id, unread]) => ({
+    const departmentIds = new Set([
+      ...departmentUnread.keys(),
+      ...departmentRegulationsUnread.keys(),
+    ]);
+    const departmentEntries = Array.from(departmentIds).map((id) => ({
       id,
-      unread,
+      unread: (departmentUnread.get(id) || 0) + (departmentRegulationsUnread.get(id) || 0),
+      regulationsUnread: departmentRegulationsUnread.get(id) || 0,
     }));
 
     return {
-      all: companyUnread + departmentEntries.reduce((sum, entry) => sum + entry.unread, 0),
-      company: companyUnread,
+      all: companyUnread + regulationsUnread + Array.from(departmentUnread.values()).reduce((sum, unread) => sum + unread, 0),
+      company: companyUnread + companyRegulationsUnread,
+      regulations: regulationsUnread,
+      companyRegulations: companyRegulationsUnread,
       departments: departmentEntries,
     };
-  }, [notifications]);
+  }, [notifications, regulations]);
 
   const postSourceOptions = useMemo(() => {
     const unreadByDepartment = new Map(
       postSourceUnreadCounts.departments.map((entry) => [entry.id, entry.unread]),
     );
 
-    const options: Array<{ key: PostSourceFilter; label: string; total: number; unread: number }> = [
+    const departmentRegulationsUnread = new Map(
+      postSourceUnreadCounts.departments.map((entry) => [entry.id, entry.regulationsUnread]),
+    );
+    const scopedRegulations = regulations.filter((document) => regulationMatchesSource(document, sourceFilter));
+    const scopedRegulationsUnread = sourceFilter === "all"
+      ? postSourceUnreadCounts.regulations
+      : sourceFilter === "company"
+        ? postSourceUnreadCounts.companyRegulations
+        : departmentRegulationsUnread.get(Number(sourceFilter.split(":")[1])) || 0;
+
+    const options: Array<{ key: FeedFilterKey; label: string; total: number; unread: number }> = [
       { key: "all", label: "Все", total: postSourceCounts.all, unread: postSourceUnreadCounts.all },
+      { key: "regulations", label: "Регламенты", total: scopedRegulations.length, unread: scopedRegulationsUnread },
       { key: "company", label: "Компания", total: postSourceCounts.company, unread: postSourceUnreadCounts.company },
     ];
 
@@ -319,24 +510,38 @@ function HomePageContent() {
       });
     }
 
-    return options.filter(({ key, total }) => key === "all" || total > 0);
-  }, [postSourceCounts, postSourceUnreadCounts]);
+    return options.filter(({ key, total }) => key === "all" || key === "regulations" || total > 0);
+  }, [postSourceCounts, postSourceUnreadCounts, regulations, sourceFilter]);
 
-  const filteredPosts = useMemo(() => {
-    if (sourceFilter === "company") {
-      return posts.filter((post) => post.type !== "department");
-    }
-    if (sourceFilter.startsWith("department:")) {
-      const departmentId = Number(sourceFilter.split(":")[1]);
-      return posts.filter((post) => post.department_id === departmentId);
-    }
-    return posts;
-  }, [posts, sourceFilter]);
+  const filteredEntries = useMemo<FeedEntry[]>(() => {
+    const postEntries: FeedEntry[] = posts.map((post) => ({
+      kind: "post",
+      post,
+      timestamp: post.created_at,
+    }));
+    const regulationEntries: FeedEntry[] = regulations.map((document) => ({
+      kind: "regulation",
+      document,
+      timestamp: document.uploaded_at || document.created_at,
+    }));
+
+    return [...postEntries, ...regulationEntries].filter((entry) => {
+      if (regulationsOnly && entry.kind !== "regulation") return false;
+      return entry.kind === "post"
+        ? postMatchesSource(entry.post, sourceFilter)
+        : regulationMatchesSource(entry.document, sourceFilter);
+    }).sort((left, right) => {
+      const leftPinned = left.kind === "post" && left.post.pinned ? 1 : 0;
+      const rightPinned = right.kind === "post" && right.post.pinned ? 1 : 0;
+      if (leftPinned !== rightPinned) return rightPinned - leftPinned;
+      return new Date(right.timestamp).getTime() - new Date(left.timestamp).getTime();
+    });
+  }, [posts, regulations, regulationsOnly, sourceFilter]);
 
   useEffect(() => {
     async function loadPosts() {
       try {
-        await refreshPosts();
+        await Promise.all([refreshPosts(), refreshRegulations()]);
       } catch (err: unknown) {
         console.error('Ошибка загрузки ленты:', err);
         setError('Не удалось загрузить ленту');
@@ -345,7 +550,7 @@ function HomePageContent() {
       }
     }
     loadPosts();
-  }, [refreshPosts]);
+  }, [refreshPosts, refreshRegulations]);
 
   useEffect(() => {
     if (postMenuOpenId === null) return;
@@ -371,6 +576,26 @@ function HomePageContent() {
     };
   }, [postMenuOpenId]);
 
+  useEffect(() => {
+    if (!createMenuOpen) return;
+
+    const handlePointerDown = (event: MouseEvent) => {
+      if (createMenuRef.current && !createMenuRef.current.contains(event.target as Node)) {
+        setCreateMenuOpen(false);
+      }
+    };
+    const handleEscape = (event: KeyboardEvent) => {
+      if (event.key === "Escape") setCreateMenuOpen(false);
+    };
+
+    document.addEventListener("mousedown", handlePointerDown);
+    document.addEventListener("keydown", handleEscape);
+    return () => {
+      document.removeEventListener("mousedown", handlePointerDown);
+      document.removeEventListener("keydown", handleEscape);
+    };
+  }, [createMenuOpen]);
+
   useEffect(() => {
     if (createType !== "department") return;
     if (createDepartmentId) return;
@@ -528,6 +753,7 @@ function HomePageContent() {
   }, [activePost?.id, commentsOpen, linkedPostId, posts]);
 
   const openCreatePostModal = () => {
+    setCreateMenuOpen(false);
     setCreateError(null);
     setEditingPostId(null);
     setCreateTitle("");
@@ -543,6 +769,11 @@ function HomePageContent() {
     setCreatePostOpen(true);
   };
 
+  const openCreateRegulationModal = () => {
+    setCreateMenuOpen(false);
+    setCreateRegulationOpen(true);
+  };
+
   const openEditPostModal = (post: Post) => {
     setCreateError(null);
     setEditingPostId(post.id);
@@ -651,13 +882,20 @@ function HomePageContent() {
       <div className="space-y-4">
         <div className="flex flex-wrap gap-2">
           {postSourceOptions.map(({ key, label, total, unread }) => {
-              const active = sourceFilter === key;
+            const active = key === "regulations" ? regulationsOnly : sourceFilter === key;
 
-              return (
+            return (
                 <button
                   key={key}
                   type="button"
-                  onClick={() => setSourceFilter(key)}
+                  aria-pressed={active}
+                  onClick={() => {
+                    if (key === "regulations") {
+                      setRegulationsOnly((current) => !current);
+                    } else {
+                      setSourceFilter(key);
+                    }
+                  }}
                   className={`inline-flex items-center gap-1.5 rounded-full px-3 py-1.5 text-xs font-medium transition ${
                     active ? "app-pill-active" : "app-pill"
                   }`}
@@ -681,11 +919,11 @@ function HomePageContent() {
             })}
         </div>
 
-        {posts.length === 0 ? (
+        {posts.length === 0 && regulations.length === 0 ? (
           <div className="app-surface-muted rounded-2xl p-8 text-center">
-            <p className="app-text-muted text-sm">Пока нет постов в ленте</p>
+            <p className="app-text-muted text-sm">Пока нет публикаций в ленте</p>
           </div>
-        ) : filteredPosts.length === 0 ? (
+        ) : filteredEntries.length === 0 ? (
           <div className="app-surface-muted rounded-2xl p-8 text-center">
             <p className="text-sm font-medium text-[var(--foreground)]">
               Публикации не найдены
@@ -695,7 +933,31 @@ function HomePageContent() {
             </p>
           </div>
         ) : (
-          filteredPosts.map((post) => {
+          filteredEntries.map((entry) => {
+            if (entry.kind === "regulation") {
+              return (
+                <FeedRegulationCard
+                  key={`regulation-${entry.document.id}`}
+                  currentUserId={user?.id}
+                  document={entry.document}
+                  isAcknowledging={acknowledgingRegulationId === entry.document.id}
+                  onAcknowledge={(document) => void handleAcknowledgeRegulation(document)}
+                  onDelete={(document) => void deleteRegulation(document)}
+                  onEdit={setMetadataRegulation}
+                  onLinkTask={setTaskLinkRegulation}
+                  onMove={setMetadataRegulation}
+                  onOpen={openRegulation}
+                  onOpenComments={openRegulationComments}
+                  onPreview={openRegulationPreview}
+                  onOpenAcknowledgements={(document) => setAcknowledgementsReport({
+                    documentId: document.id,
+                    documentTitle: document.title,
+                  })}
+                />
+              );
+            }
+
+            const post = entry.post;
             // Форматируем дату
             const postDate = new Date(post.created_at);
             const now = new Date();
@@ -710,7 +972,7 @@ function HomePageContent() {
 
             return (
               <FeedPostCard
-                key={post.id}
+                key={`post-${post.id}`}
                 authorHref={post.author ? userProfileLink(post.author, user?.id) : null}
                 post={post}
                 authorSubtitle={
@@ -854,20 +1116,65 @@ function HomePageContent() {
         )}
       </div>
 
-      {canCreatePost && !createPostOpen ? (
-        <div className="pointer-events-none fixed bottom-[calc(env(safe-area-inset-bottom)+5.5rem)] right-4 z-30 lg:bottom-6 lg:right-[max(2rem,calc((100vw-72rem)/2+21.5rem))]">
+      {user && !createPostOpen && !createRegulationOpen ? (
+        <div
+          ref={createMenuRef}
+          className="pointer-events-none fixed bottom-[calc(env(safe-area-inset-bottom)+5.5rem)] right-4 z-30 flex flex-col items-end gap-2 lg:bottom-6 lg:right-[max(2rem,calc((100vw-72rem)/2+21.5rem))]"
+        >
+          {createMenuOpen ? (
+            <div className="flex flex-col items-end gap-2" role="menu" aria-label="Создать в ленте">
+              {canCreatePost ? (
+                <button
+                  type="button"
+                  role="menuitem"
+                  onClick={openCreatePostModal}
+                  className="app-action-primary pointer-events-auto inline-flex h-10 items-center gap-2 rounded-full px-4 text-sm font-medium shadow-[var(--shadow-card)]"
+                >
+                  <Newspaper size={17} />
+                  Новость
+                </button>
+              ) : null}
+              <button
+                type="button"
+                role="menuitem"
+                onClick={openCreateRegulationModal}
+                className="app-action-primary pointer-events-auto inline-flex h-10 items-center gap-2 rounded-full px-4 text-sm font-medium shadow-[var(--shadow-card)]"
+              >
+                <ScrollText size={17} />
+                Регламент
+              </button>
+            </div>
+          ) : null}
           <button
             type="button"
-            onClick={openCreatePostModal}
+            onClick={() => setCreateMenuOpen((current) => !current)}
             className="app-action-primary pointer-events-auto inline-flex h-12 w-12 items-center justify-center rounded-full p-0 leading-none shadow-[var(--shadow-card)] transition active:scale-[0.98]"
-            title="Создать публикацию"
-            aria-label="Создать публикацию"
+            title={createMenuOpen ? "Закрыть меню создания" : "Создать"}
+            aria-label={createMenuOpen ? "Закрыть меню создания" : "Открыть меню создания"}
+            aria-expanded={createMenuOpen}
+            aria-haspopup="menu"
           >
-            <Plus size={22} />
+            <Plus size={22} className={`transition-transform duration-200 ${createMenuOpen ? "rotate-45" : ""}`} />
           </button>
         </div>
       ) : null}
 
+      <Modal
+        isOpen={createRegulationOpen}
+        onClose={() => setCreateRegulationOpen(false)}
+        title="Создать регламент"
+        size="xl"
+      >
+        <DocumentUploadForm
+          defaultIsRegulation
+          onCancel={() => setCreateRegulationOpen(false)}
+          onSuccess={() => {
+            setCreateRegulationOpen(false);
+            void refreshRegulations();
+          }}
+        />
+      </Modal>
+
       <Modal
         isOpen={createPostOpen}
         onClose={() => setCreatePostOpen(false)}
@@ -979,6 +1286,85 @@ function HomePageContent() {
         post={activePost}
       />
 
+      <DocumentDetailModal
+        key={selectedRegulation ? `${selectedRegulation.id}-${selectedRegulationInitialTab || "default"}` : "regulation-detail"}
+        document={selectedRegulation}
+        isOpen={Boolean(selectedRegulation)}
+        initialTab={selectedRegulationInitialTab}
+        onClose={() => {
+          setSelectedRegulation(null);
+          setSelectedRegulationInitialTab(undefined);
+        }}
+        onUpdate={() => {
+          void refreshRegulations();
+          if (selectedRegulation) {
+            void apiClient.getDocument(selectedRegulation.id).then(setSelectedRegulation);
+          }
+        }}
+        onEditMetadata={() => {
+          if (selectedRegulation) setMetadataRegulation(selectedRegulation);
+        }}
+        onViewReport={() => {
+          if (!selectedRegulation) return;
+          setAcknowledgementsReport({
+            documentId: selectedRegulation.id,
+            documentTitle: selectedRegulation.title,
+          });
+        }}
+        onNavigateToRelated={(documentId) => {
+          setSelectedRegulationInitialTab(undefined);
+          void apiClient.getDocument(documentId).then(setSelectedRegulation);
+        }}
+      />
+
+      {metadataRegulation ? (
+        <DocumentMetadataEditor
+          isOpen
+          document={metadataRegulation}
+          onClose={() => setMetadataRegulation(null)}
+          onUpdate={() => {
+            void refreshRegulations();
+            if (selectedRegulation?.id === metadataRegulation.id) {
+              void apiClient.getDocument(metadataRegulation.id).then(setSelectedRegulation);
+            }
+          }}
+        />
+      ) : null}
+
+      {taskLinkRegulation ? (
+        <DocumentTaskLinks
+          document={taskLinkRegulation}
+          variant="dialog"
+          open
+          onClose={() => setTaskLinkRegulation(null)}
+          onLinked={() => void refreshRegulations()}
+        />
+      ) : null}
+
+      {regulationPreviewFile ? (
+        <DocumentPreview
+          fileUrl={regulationPreviewFile.url}
+          fileName={regulationPreviewFile.name}
+          onClose={() => setRegulationPreviewFile(null)}
+        />
+      ) : null}
+
+      {regulationPdfFile ? (
+        <EnhancedPDFViewer
+          fileUrl={regulationPdfFile.url}
+          fileName={regulationPdfFile.name}
+          onClose={() => setRegulationPdfFile(null)}
+        />
+      ) : null}
+
+      {acknowledgementsReport ? (
+        <DocumentAcknowledgementsReport
+          documentId={acknowledgementsReport.documentId}
+          documentTitle={acknowledgementsReport.documentTitle}
+          onClose={() => setAcknowledgementsReport(null)}
+        />
+      ) : null}
+
       {taskLinkPost ? (
         <RelatedTaskLinks
           key={`post-task-link-${taskLinkPost.id}`}
diff --git a/frontend/src/app/procurement/page.tsx b/frontend/src/app/procurement/page.tsx
index c30ea4bf..3ae46543 100644
--- a/frontend/src/app/procurement/page.tsx
+++ b/frontend/src/app/procurement/page.tsx
@@ -34,6 +34,7 @@ import {
   Loader2,
   MessageSquare,
   Package,
+  Paperclip,
   Pencil,
   Play,
   Plus,
@@ -455,6 +456,9 @@ export default function ProcurementPage() {
     handleDeleteComment,
     handleAddItemComment,
     handleDeleteItemComment,
+    handleDownloadItemAttachment,
+    handleUploadItemAttachments,
+    handleDeleteItemAttachment,
     markRequestNotificationsRead,
     toggleItemComments,
   } = useProcurementPage(user);
@@ -1518,6 +1522,9 @@ export default function ProcurementPage() {
                           onItemCommentDraftChange={(itemId, value) => setItemCommentDrafts((previous) => ({ ...previous, [itemId]: value }))}
                           onAddItemComment={handleAddItemComment}
                           onDeleteItemComment={handleDeleteItemComment}
+                          onDownloadItemAttachment={handleDownloadItemAttachment}
+                          onUploadItemAttachments={handleUploadItemAttachments}
+                          onDeleteItemAttachment={handleDeleteItemAttachment}
                           footer={(
                             <ProcurementRequestActionButtons
                               request={resolvedDetail}
@@ -1695,6 +1702,9 @@ export default function ProcurementPage() {
               onItemCommentDraftChange={(itemId, value) => setItemCommentDrafts((previous) => ({ ...previous, [itemId]: value }))}
               onAddItemComment={handleAddItemComment}
               onDeleteItemComment={handleDeleteItemComment}
+              onDownloadItemAttachment={handleDownloadItemAttachment}
+              onUploadItemAttachments={handleUploadItemAttachments}
+              onDeleteItemAttachment={handleDeleteItemAttachment}
             />
 
             <div className="app-surface rounded-xl p-4">
@@ -2227,6 +2237,77 @@ export default function ProcurementPage() {
                               </div>
                             ))}
                           </div>
+                          <div className="space-y-2">
+                            <div className="flex items-center justify-between gap-2">
+                              <span className="app-text-muted text-xs font-medium">Файлы</span>
+                              <label className="app-link-accent inline-flex cursor-pointer items-center gap-1 text-xs font-medium">
+                                <Paperclip size={12} /> Прикрепить
+                                <input
+                                  type="file"
+                                  multiple
+                                  className="hidden"
+                                  onChange={(event) => {
+                                    const files = Array.from(event.target.files || []);
+                                    if (files.length > 0) {
+                                      updateItemRow(idx, { pending_files: [...it.pending_files, ...files] });
+                                    }
+                                    event.target.value = "";
+                                  }}
+                                />
+                              </label>
+                            </div>
+                            {it.attachments.length > 0 || it.pending_files.length > 0 ? (
+                              <div className="flex flex-wrap gap-1.5">
+                                {it.attachments.map((attachment) => (
+                                  <span
+                                    key={`attachment-${attachment.id}`}
+                                    className="app-badge inline-flex max-w-full items-center gap-1 rounded-full px-2 py-1 text-[11px]"
+                                  >
+                                    <button
+                                      type="button"
+                                      className="inline-flex min-w-0 items-center gap-1"
+                                      onClick={() => void handleDownloadItemAttachment(it.id!, attachment)}
+                                    >
+                                      <Paperclip size={11} className="shrink-0" />
+                                      <span className="max-w-48 truncate">{attachment.file_name}</span>
+                                    </button>
+                                    <button
+                                      type="button"
+                                      title="Удалить файл"
+                                      onClick={() => updateItemRow(idx, {
+                                        attachments: it.attachments.filter((current) => current.id !== attachment.id),
+                                        removed_attachment_ids: [...it.removed_attachment_ids, attachment.id],
+                                      })}
+                                      className="app-action-ghost inline-flex h-5 w-5 shrink-0 items-center justify-center rounded-full"
+                                    >
+                                      <X size={10} />
+                                    </button>
+                                  </span>
+                                ))}
+                                {it.pending_files.map((file, fileIndex) => (
+                                  <span
+                                    key={`pending-${file.name}-${file.lastModified}-${fileIndex}`}
+                                    className="app-selected inline-flex max-w-full items-center gap-1 rounded-full px-2 py-1 text-[11px]"
+                                  >
+                                    <Paperclip size={11} className="shrink-0" />
+                                    <span className="max-w-48 truncate">{file.name}</span>
+                                    <button
+                                      type="button"
+                                      title="Убрать файл"
+                                      onClick={() => updateItemRow(idx, {
+                                        pending_files: it.pending_files.filter((_, currentIndex) => currentIndex !== fileIndex),
+                                      })}
+                                      className="app-action-ghost inline-flex h-5 w-5 shrink-0 items-center justify-center rounded-full"
+                                    >
+                                      <X size={10} />
+                                    </button>
+                                  </span>
+                                ))}
+                              </div>
+                            ) : (
+                              <p className="app-text-muted text-[11px]">Файлы не прикреплены</p>
+                            )}
+                          </div>
                         </div>
                       </div>
                   ))}
diff --git a/frontend/src/app/register/page.tsx b/frontend/src/app/register/page.tsx
index ad437562..e4f94019 100644
--- a/frontend/src/app/register/page.tsx
+++ b/frontend/src/app/register/page.tsx
@@ -95,12 +95,6 @@ export default function Register() {
     const file = e.target.files?.[0];
     if (!file) return;
 
-    // Проверка размера (макс 10MB для исходного файла)
-    if (file.size > 10 * 1024 * 1024) {
-      setError('Размер файла не должен превышать 10MB');
-      return;
-    }
-
     // Проверка типа
     if (!file.type.startsWith('image/')) {
       setError('Выберите изображение');
diff --git a/frontend/src/app/tasks/page.tsx b/frontend/src/app/tasks/page.tsx
index d93b7aec..15a1498b 100644
--- a/frontend/src/app/tasks/page.tsx
+++ b/frontend/src/app/tasks/page.tsx
@@ -17,14 +17,17 @@ import {
 import { CSS } from "@dnd-kit/utilities";
 import {
   CalendarDays,
+  Check,
   ChevronDown,
   ChevronRight,
+  Download,
+  ExternalLink as ExternalLinkIcon,
   FileSignature,
   FileText,
-  GripVertical,
   History,
   Kanban,
   Link2,
+  ListChecks,
   Loader2,
   Maximize2,
   MessageSquare,
@@ -32,6 +35,7 @@ import {
   Newspaper,
   Paperclip,
   Pencil,
+  Play,
   Plus,
   RefreshCw,
   Search,
@@ -41,10 +45,12 @@ import {
   Trash2,
   UserRound,
   X,
+  type LucideIcon,
 } from "lucide-react";
 import { Suspense, useCallback, useEffect, useMemo, useRef, useState, type RefObject } from "react";
 
 import { AppShell } from "@/components/AppShell";
+import { RequestAvatar } from "@/components/requests/RequestAvatar";
 import { CommentComposer, CommentDeleteButton } from "@/components/shared/CommentControls";
 import { Modal } from "@/components/ui";
 import { useUser } from "@/contexts/UserContext";
@@ -53,13 +59,18 @@ import { displayUserName, formatDate, formatDateTime, formatMoney } from "@/lib/
 import { resolveMediaUrl } from "@/lib/url";
 import wsManager from "@/lib/websocketManager";
 import type {
+  CalendarEvent,
   Department,
+  Document,
   Message,
   TaskActivity,
+  TaskAttachment,
   TaskBoard,
   TaskCard,
+  TaskChecklistItem,
   TaskColumn,
   TaskComment,
+  TaskExternalLink,
   TaskLinkedAttendanceRecord,
   TaskLinkedDocument,
   TaskLinkedEmployee,
@@ -89,7 +100,7 @@ type BoardFormState = {
   id: number | null;
   name: string;
   description: string;
-  access: "all" | "restricted";
+  access: "all" | "private" | "restricted";
   member_ids: number[];
   department_ids: number[];
 };
@@ -100,6 +111,22 @@ type ColumnFormState = {
   is_done: boolean;
 };
 
+type LinkedItemMode = "document" | "calendar_event" | "external_link";
+type LinkedItemTarget = "view" | "form";
+
+type TaskFormExternalLinkDraft = {
+  key: string;
+  url: string;
+  title: string;
+};
+
+type TaskFormChecklistItemDraft = {
+  key: string;
+  title: string;
+  position: number;
+  is_completed: boolean;
+};
+
 type TaskBoardSocketEvent = {
   type: string;
   data?: {
@@ -107,6 +134,7 @@ type TaskBoardSocketEvent = {
     event?: string;
     model?: string;
     object_id?: number | null;
+    task_id?: number;
   };
 };
 
@@ -146,6 +174,15 @@ function TaskDescriptionPreview({ description }: { description: string }) {
   );
 }
 
+function getEmployeeInitials(employee: User): string {
+  const initials = [employee.first_name, employee.last_name]
+    .map((part) => part?.trim().charAt(0) || "")
+    .join("")
+    .slice(0, 2)
+    .toUpperCase();
+  return initials || displayUserName(employee).slice(0, 2).toUpperCase();
+}
+
 const emptyColumnForm: ColumnFormState = {
   name: "",
   color: "#38bdf8",
@@ -207,6 +244,25 @@ function getTaskError(error: unknown, fallback: string) {
   return raw;
 }
 
+function extractApiResults<T>(response: T[] | { results?: T[] } | null | undefined): T[] {
+  if (Array.isArray(response)) return response;
+  return response?.results || [];
+}
+
+function normalizeExternalUrl(value: string): string {
+  const trimmed = value.trim();
+  if (!trimmed) return "";
+  return /^[a-z][a-z\d+.-]*:\/\//i.test(trimmed) ? trimmed : `https://${trimmed}`;
+}
+
+function getExternalLinkHost(url: string): string {
+  try {
+    return new URL(url).host;
+  } catch {
+    return url;
+  }
+}
+
 function toDateOnlyTime(value?: string | null) {
   if (!value) return null;
   const match = String(value).match(/^(\d{4})-(\d{2})-(\d{2})/);
@@ -239,6 +295,14 @@ function getTaskDueDateBadgeClass(task: TaskCard, defaultClass = "app-badge") {
   return defaultClass;
 }
 
+function formatFileSize(size: number): string {
+  if (size < 1024) return `${size} Б`;
+  if (size < 1024 * 1024) return `${Math.ceil(size / 1024)} КБ`;
+  return `${(size / (1024 * 1024)).toLocaleString("ru-RU", {
+    maximumFractionDigits: 1,
+  })} МБ`;
+}
+
 function getMessageCreatedLabel(message?: Message | null) {
   if (!message) return "";
   return message.created || (message.created_at ? formatDate(message.created_at) : "");
@@ -249,6 +313,11 @@ function TaskCardView({
   onOpen,
   onEdit,
   onDelete,
+  currentUserId,
+  claiming,
+  onClaim,
+  completing,
+  onComplete,
   menuOpen,
   menuRef,
   onToggleMenu,
@@ -257,6 +326,11 @@ function TaskCardView({
   onOpen: (task: TaskCard) => void;
   onEdit: (task: TaskCard) => void;
   onDelete: (task: TaskCard) => void;
+  currentUserId?: number;
+  claiming: boolean;
+  onClaim: (task: TaskCard) => void;
+  completing: boolean;
+  onComplete: (task: TaskCard) => void;
   menuOpen: boolean;
   menuRef: RefObject<HTMLDivElement | null>;
   onToggleMenu: () => void;
@@ -268,31 +342,23 @@ function TaskCardView({
   const style = transform && !isDragging ? { transform: CSS.Translate.toString(transform) } : undefined;
   const priority = priorityMeta[task.priority] ?? priorityMeta.medium;
   const dueDateClass = getTaskDueDateBadgeClass(task);
+  const canClaim = !task.assignee && !task.completed_at;
+  const canComplete = task.assignee?.id === currentUserId && !task.completed_at;
 
   return (
     <article
       ref={setNodeRef}
       style={style}
-      className={`app-surface-elevated rounded-xl border border-[var(--border-subtle)] p-3 shadow-sm transition ${
+      className={`app-surface-elevated cursor-grab select-none rounded-xl border border-[var(--border-subtle)] p-3 shadow-sm transition active:cursor-grabbing ${
         isDragging ? "opacity-30" : "hover:border-[var(--border-strong)]"
       }`}
+      title="Перетащите задачу в нужную колонку"
+      onClick={() => onOpen(task)}
+      {...attributes}
+      {...listeners}
     >
       <div className="mb-2 flex items-start gap-2">
-        <button
-          type="button"
-          className="app-action-ghost mt-0.5 flex h-7 w-7 shrink-0 items-center justify-center rounded-md"
-          aria-label="Переместить задачу"
-          title="Переместить"
-          {...listeners}
-          {...attributes}
-        >
-          <GripVertical size={14} />
-        </button>
-        <button
-          type="button"
-          onClick={() => onOpen(task)}
-          className="min-w-0 flex-1 overflow-hidden whitespace-normal text-left"
-        >
+        <div className="min-w-0 flex-1 overflow-hidden whitespace-normal text-left">
           <div className="flex min-w-0 items-center gap-2">
             <span className="app-badge shrink-0 rounded-full px-1.5 py-0.5 text-[10px] font-semibold">
               #{task.id}
@@ -302,9 +368,14 @@ function TaskCardView({
             </h3>
           </div>
           {task.description ? <TaskDescriptionPreview description={task.description} /> : null}
-        </button>
+        </div>
         <div className="flex shrink-0 flex-col items-end gap-1">
-          <div ref={menuOpen ? menuRef : null} className="relative">
+          <div
+            ref={menuOpen ? menuRef : null}
+            className="relative"
+            onPointerDown={(event) => event.stopPropagation()}
+            onClick={(event) => event.stopPropagation()}
+          >
             <button
               type="button"
               onClick={onToggleMenu}
@@ -361,6 +432,46 @@ function TaskCardView({
       ) : null}
 
       <div className="flex flex-wrap items-center gap-1.5">
+        {canClaim ? (
+          <button
+            type="button"
+            onPointerDown={(event) => event.stopPropagation()}
+            onClick={(event) => {
+              event.stopPropagation();
+              onClaim(task);
+            }}
+            disabled={claiming}
+            className="app-action-primary inline-flex h-7 w-7 shrink-0 items-center justify-center rounded-full disabled:cursor-wait disabled:opacity-60"
+            title="Взять задачу в работу"
+            aria-label={`Взять задачу в работу ${task.title}`}
+          >
+            {claiming ? (
+              <Loader2 size={13} className="animate-spin" />
+            ) : (
+              <Play size={14} />
+            )}
+          </button>
+        ) : null}
+        {canComplete ? (
+          <button
+            type="button"
+            onPointerDown={(event) => event.stopPropagation()}
+            onClick={(event) => {
+              event.stopPropagation();
+              onComplete(task);
+            }}
+            disabled={completing}
+            className="app-action-success inline-flex h-7 w-7 shrink-0 items-center justify-center rounded-full disabled:cursor-wait disabled:opacity-60"
+            title="Завершить задачу"
+            aria-label={`Завершить задачу ${task.title}`}
+          >
+            {completing ? (
+              <Loader2 size={13} className="animate-spin" />
+            ) : (
+              <Check size={14} strokeWidth={2.5} />
+            )}
+          </button>
+        ) : null}
         {task.assignee ? (
           <span className="app-badge inline-flex items-center gap-1 rounded-full px-2 py-1 text-[11px]">
             <UserRound size={11} />
@@ -373,6 +484,18 @@ function TaskCardView({
             {formatDate(task.due_date)}
           </span>
         ) : null}
+        {(task.checklist_total || 0) > 0 ? (
+          <span className="app-badge inline-flex items-center gap-1 rounded-full px-2 py-1 text-[11px]">
+            <ListChecks size={11} />
+            {task.checklist_completed || 0}/{task.checklist_total}
+          </span>
+        ) : null}
+        {(task.attachments_count || 0) > 0 ? (
+          <span className="app-badge inline-flex items-center gap-1 rounded-full px-2 py-1 text-[11px]">
+            <Paperclip size={11} />
+            {task.attachments_count}
+          </span>
+        ) : null}
         {(task.linked_objects_count || task.linked_messages_count || 0) > 0 ? (
           <span className="app-badge inline-flex items-center gap-1 rounded-full px-2 py-1 text-[11px]">
             <Link2 size={11} />
@@ -397,9 +520,6 @@ function TaskDragOverlayCard({ task }: { task: TaskCard }) {
   return (
     <article className="app-surface-elevated w-[17rem] cursor-grabbing rounded-xl border border-[var(--accent-primary)] p-3 shadow-2xl ring-1 ring-[color:var(--accent-primary)]/20">
       <div className="mb-2 flex items-start gap-2">
-        <div className="app-action-ghost mt-0.5 flex h-7 w-7 shrink-0 items-center justify-center rounded-md">
-          <GripVertical size={14} />
-        </div>
         <div className="min-w-0 flex-1 overflow-hidden whitespace-normal text-left">
           <div className="flex min-w-0 items-center gap-2">
             <span className="app-badge shrink-0 rounded-full px-1.5 py-0.5 text-[10px] font-semibold">
@@ -443,6 +563,18 @@ function TaskDragOverlayCard({ task }: { task: TaskCard }) {
             {formatDate(task.due_date)}
           </span>
         ) : null}
+        {(task.checklist_total || 0) > 0 ? (
+          <span className="app-badge inline-flex items-center gap-1 rounded-full px-2 py-1 text-[11px]">
+            <ListChecks size={11} />
+            {task.checklist_completed || 0}/{task.checklist_total}
+          </span>
+        ) : null}
+        {(task.attachments_count || 0) > 0 ? (
+          <span className="app-badge inline-flex items-center gap-1 rounded-full px-2 py-1 text-[11px]">
+            <Paperclip size={11} />
+            {task.attachments_count}
+          </span>
+        ) : null}
         {(task.linked_objects_count || task.linked_messages_count || 0) > 0 ? (
           <span className="app-badge inline-flex items-center gap-1 rounded-full px-2 py-1 text-[11px]">
             <Link2 size={11} />
@@ -467,6 +599,11 @@ function BoardColumn({
   onOpenTask,
   onEditTask,
   onDeleteTask,
+  currentUserId,
+  claimingTaskId,
+  onClaimTask,
+  completingTaskId,
+  onCompleteTask,
   openMenuTaskId,
   menuRef,
   onToggleTaskMenu,
@@ -479,6 +616,11 @@ function BoardColumn({
   onOpenTask: (task: TaskCard) => void;
   onEditTask: (task: TaskCard) => void;
   onDeleteTask: (task: TaskCard) => void;
+  currentUserId?: number;
+  claimingTaskId: number | null;
+  onClaimTask: (task: TaskCard) => void;
+  completingTaskId: number | null;
+  onCompleteTask: (task: TaskCard) => void;
   openMenuTaskId: number | null;
   menuRef: RefObject<HTMLDivElement | null>;
   onToggleTaskMenu: (taskId: number) => void;
@@ -533,6 +675,11 @@ function BoardColumn({
               onOpen={onOpenTask}
               onEdit={onEditTask}
               onDelete={onDeleteTask}
+              currentUserId={currentUserId}
+              claiming={claimingTaskId === task.id}
+              onClaim={onClaimTask}
+              completing={completingTaskId === task.id}
+              onComplete={onCompleteTask}
               menuOpen={openMenuTaskId === task.id}
               menuRef={menuRef}
               onToggleMenu={() => onToggleTaskMenu(task.id)}
@@ -1603,6 +1750,158 @@ function LinkedAttendanceRecordCard({
   );
 }
 
+function TaskExternalLinkCard({
+  link,
+  onDelete,
+  disabled,
+}: {
+  link: TaskExternalLink;
+  onDelete: (linkId: number) => void;
+  disabled: boolean;
+}) {
+  return (
+    <article className="app-surface-muted rounded-xl border border-[var(--border-subtle)] p-3">
+      <div className="relative">
+        <a
+          href={link.url}
+          target="_blank"
+          rel="noreferrer"
+          className="flex min-w-0 items-start gap-3 rounded-lg pr-10 transition hover:bg-[var(--surface-elevated)] focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-[var(--accent-primary)]"
+          title="Открыть внешнюю ссылку"
+        >
+          <span className="app-selected flex h-8 w-8 shrink-0 items-center justify-center rounded-lg">
+            <ExternalLinkIcon size={15} />
+          </span>
+          <span className="min-w-0 flex-1">
+            <span className="block truncate text-sm font-semibold text-[var(--foreground)]">
+              {link.title || getExternalLinkHost(link.url)}
+            </span>
+            <span className="app-text-muted mt-0.5 block truncate text-xs">
+              {link.url}
+            </span>
+            <span className="app-text-muted mt-2 block text-[11px]">
+              Добавил: {link.created_by ? displayUserName(link.created_by) : "не указано"}
+            </span>
+          </span>
+        </a>
+        <button
+          type="button"
+          onClick={() => onDelete(link.id)}
+          disabled={disabled}
+          className="app-icon-button absolute right-0 top-0 z-10 flex h-8 w-8 shrink-0 items-center justify-center rounded-lg disabled:opacity-50"
+          title="Удалить ссылку"
+          aria-label={`Удалить ссылку ${link.title || link.url}`}
+        >
+          <Trash2 size={14} />
+        </button>
+      </div>
+    </article>
+  );
+}
+
+function TaskFormResourceRow({
+  icon: Icon,
+  title,
+  meta,
+  pending = false,
+  onRemove,
+}: {
+  icon: LucideIcon;
+  title: string;
+  meta?: string;
+  pending?: boolean;
+  onRemove: () => void;
+}) {
+  return (
+    <div className="flex min-w-0 items-center gap-2 border-b border-[var(--border-subtle)] px-3 py-2.5 last:border-b-0">
+      <span className="app-selected flex h-8 w-8 shrink-0 items-center justify-center rounded-lg">
+        <Icon size={15} />
+      </span>
+      <span className="min-w-0 flex-1">
+        <span className="block truncate text-sm font-medium text-[var(--foreground)]">
+          {title}
+        </span>
+        {meta ? (
+          <span className="app-text-muted mt-0.5 block truncate text-[11px]">
+            {meta}
+          </span>
+        ) : null}
+      </span>
+      {pending ? (
+        <span className="app-badge shrink-0 rounded-full px-2 py-0.5 text-[10px]">
+          новое
+        </span>
+      ) : null}
+      <button
+        type="button"
+        onClick={onRemove}
+        className="app-icon-button flex h-8 w-8 shrink-0 items-center justify-center rounded-lg"
+        title="Убрать"
+        aria-label={`Убрать ${title}`}
+      >
+        <Trash2 size={14} />
+      </button>
+    </div>
+  );
+}
+
+
+function TaskChecklistFormRow({
+  title,
+  isCompleted,
+  pending,
+  disabled,
+  onTitleChange,
+  onCompletedChange,
+  onRemove,
+}: {
+  title: string;
+  isCompleted: boolean;
+  pending?: boolean;
+  disabled?: boolean;
+  onTitleChange: (value: string) => void;
+  onCompletedChange: (value: boolean) => void;
+  onRemove: () => void;
+}) {
+  return (
+    <div className="flex min-w-0 items-center gap-2 border-b border-[var(--border-subtle)] px-3 py-2 last:border-b-0">
+      <input
+        type="checkbox"
+        checked={isCompleted}
+        onChange={(event) => onCompletedChange(event.target.checked)}
+        disabled={disabled}
+        className="h-4 w-4 shrink-0 accent-sky-500"
+        aria-label={isCompleted ? "Вернуть пункт в работу" : "Отметить пункт выполненным"}
+      />
+      <input
+        value={title}
+        onChange={(event) => onTitleChange(event.target.value)}
+        disabled={disabled}
+        className={`app-input min-w-0 flex-1 rounded-lg px-2.5 py-1.5 text-sm ${
+          isCompleted ? "line-through opacity-70" : ""
+        }`}
+        aria-label="Текст пункта чек-листа"
+      />
+      {pending ? (
+        <span className="app-badge shrink-0 rounded-full px-2 py-0.5 text-[10px]">
+          новое
+        </span>
+      ) : null}
+      <button
+        type="button"
+        onClick={onRemove}
+        disabled={disabled}
+        className="app-icon-button flex h-8 w-8 shrink-0 items-center justify-center rounded-lg text-[var(--danger-foreground)] disabled:opacity-50"
+        title="Удалить пункт"
+        aria-label={`Удалить пункт ${title}`}
+      >
+        <Trash2 size={14} />
+      </button>
+    </div>
+  );
+}
+
+
 const activityFieldLabels: Record<string, string> = {
   title: "название",
   description: "описание",
@@ -1635,6 +1934,33 @@ function getActivityDetail(activity: TaskActivity): string {
     const column = typeof metadata.column === "string" ? metadata.column : "";
     return column ? `Колонка: ${column}` : "";
   }
+  if (
+    activity.action === "attachment_added" ||
+    activity.action === "attachment_removed"
+  ) {
+    return typeof metadata.file_name === "string" ? metadata.file_name : "Файл";
+  }
+  if (activity.action.startsWith("checklist_item_")) {
+    return typeof metadata.item_title === "string"
+      ? metadata.item_title
+      : "Пункт чек-листа";
+  }
+  if (activity.action === "comment_edited") {
+    const previousText = typeof metadata.previous_text === "string"
+      ? metadata.previous_text
+      : "";
+    const commentText = typeof metadata.comment_text === "string"
+      ? metadata.comment_text
+      : "";
+    if (previousText && commentText) {
+      return `Было: ${previousText}\nСтало: ${commentText}`;
+    }
+  }
+  if (activity.action === "comment_added" || activity.action === "comment_removed") {
+    return typeof metadata.comment_text === "string"
+      ? metadata.comment_text
+      : `Комментарий #${activity.object_id || ""}`;
+  }
   return "";
 }
 
@@ -1659,7 +1985,7 @@ function TaskActivityCard({ activity }: { activity: TaskActivity }) {
             {activity.actor ? displayUserName(activity.actor) : "Система"}
           </p>
           {detail ? (
-            <p className="app-text-wrap mt-2 text-xs text-[var(--foreground)]">
+              <p className="app-text-wrap mt-2 whitespace-pre-wrap text-xs text-[var(--foreground)]">
               {detail}
             </p>
           ) : null}
@@ -1689,6 +2015,8 @@ function TasksPageContent() {
   const [departments, setDepartments] = useState<Department[]>([]);
   const [loading, setLoading] = useState(true);
   const [saving, setSaving] = useState(false);
+  const [claimingTaskId, setClaimingTaskId] = useState<number | null>(null);
+  const [completingTaskId, setCompletingTaskId] = useState<number | null>(null);
   const [error, setError] = useState<string | null>(null);
   const [search, setSearch] = useState("");
   const [onlyMine, setOnlyMine] = useState(false);
@@ -1706,6 +2034,8 @@ function TasksPageContent() {
   const [columnModalOpen, setColumnModalOpen] = useState(false);
   const [form, setForm] = useState<TaskFormState>(emptyForm);
   const [boardForm, setBoardForm] = useState<BoardFormState>(emptyBoardForm);
+  const [boardMemberSearch, setBoardMemberSearch] = useState("");
+  const [boardDepartmentSearch, setBoardDepartmentSearch] = useState("");
   const [columnForm, setColumnForm] = useState<ColumnFormState>(emptyColumnForm);
   const [labelName, setLabelName] = useState("");
   const [labelColor, setLabelColor] = useState("#38bdf8");
@@ -1720,11 +2050,54 @@ function TasksPageContent() {
   const [linkedGuests, setLinkedGuests] = useState<TaskLinkedGuest[]>([]);
   const [linkedGuestVisits, setLinkedGuestVisits] = useState<TaskLinkedGuestVisit[]>([]);
   const [linkedAttendanceRecords, setLinkedAttendanceRecords] = useState<TaskLinkedAttendanceRecord[]>([]);
+  const [taskExternalLinks, setTaskExternalLinks] = useState<TaskExternalLink[]>([]);
   const [linkedObjectsLoading, setLinkedObjectsLoading] = useState(false);
+  const [linkedItemModalOpen, setLinkedItemModalOpen] = useState(false);
+  const [linkedItemMode, setLinkedItemMode] = useState<LinkedItemMode>("document");
+  const [linkedItemTarget, setLinkedItemTarget] = useState<LinkedItemTarget>("view");
+  const [linkedItemSearch, setLinkedItemSearch] = useState("");
+  const [linkedItemCandidatesLoading, setLinkedItemCandidatesLoading] = useState(false);
+  const [availableDocuments, setAvailableDocuments] = useState<Document[]>([]);
+  const [availableEvents, setAvailableEvents] = useState<CalendarEvent[]>([]);
+  const [externalLinkUrl, setExternalLinkUrl] = useState("");
+  const [externalLinkTitle, setExternalLinkTitle] = useState("");
+  const [taskFormFilesOpen, setTaskFormFilesOpen] = useState(false);
+  const [taskFormLinksOpen, setTaskFormLinksOpen] = useState(false);
+  const [taskFormChecklistOpen, setTaskFormChecklistOpen] = useState(false);
+  const [taskFormChecklistDraft, setTaskFormChecklistDraft] = useState("");
+  const [taskFormResourcesLoading, setTaskFormResourcesLoading] = useState(false);
+  const [taskFormChecklistItems, setTaskFormChecklistItems] = useState<TaskChecklistItem[]>([]);
+  const [taskFormPendingChecklistItems, setTaskFormPendingChecklistItems] = useState<TaskFormChecklistItemDraft[]>([]);
+  const [taskFormRemovedChecklistItemIds, setTaskFormRemovedChecklistItemIds] = useState<number[]>([]);
+  const [taskFormDirtyChecklistItemIds, setTaskFormDirtyChecklistItemIds] = useState<number[]>([]);
+  const [taskFormAttachments, setTaskFormAttachments] = useState<TaskAttachment[]>([]);
+  const [taskFormDocuments, setTaskFormDocuments] = useState<TaskLinkedDocument[]>([]);
+  const [taskFormEvents, setTaskFormEvents] = useState<TaskLinkedCalendarEvent[]>([]);
+  const [taskFormExternalLinks, setTaskFormExternalLinks] = useState<TaskExternalLink[]>([]);
+  const [taskFormPendingFiles, setTaskFormPendingFiles] = useState<File[]>([]);
+  const [taskFormPendingDocuments, setTaskFormPendingDocuments] = useState<Document[]>([]);
+  const [taskFormPendingEvents, setTaskFormPendingEvents] = useState<CalendarEvent[]>([]);
+  const [taskFormPendingExternalLinks, setTaskFormPendingExternalLinks] = useState<TaskFormExternalLinkDraft[]>([]);
+  const [taskFormRemovedAttachmentIds, setTaskFormRemovedAttachmentIds] = useState<number[]>([]);
+  const [taskFormRemovedDocumentLinkIds, setTaskFormRemovedDocumentLinkIds] = useState<number[]>([]);
+  const [taskFormRemovedEventLinkIds, setTaskFormRemovedEventLinkIds] = useState<number[]>([]);
+  const [taskFormRemovedExternalLinkIds, setTaskFormRemovedExternalLinkIds] = useState<number[]>([]);
   const [commentsOpen, setCommentsOpen] = useState(false);
   const [taskComments, setTaskComments] = useState<TaskComment[]>([]);
+  const [editingCommentId, setEditingCommentId] = useState<number | null>(null);
+  const [editingCommentDraft, setEditingCommentDraft] = useState("");
   const [taskCommentsLoading, setTaskCommentsLoading] = useState(false);
   const [commentDraft, setCommentDraft] = useState("");
+  const [attachmentsOpen, setAttachmentsOpen] = useState(false);
+  const [taskAttachments, setTaskAttachments] = useState<TaskAttachment[]>([]);
+  const [taskAttachmentsLoading, setTaskAttachmentsLoading] = useState(false);
+  const [taskAttachmentsUploading, setTaskAttachmentsUploading] = useState(false);
+  const [checklistOpen, setChecklistOpen] = useState(false);
+  const [taskChecklist, setTaskChecklist] = useState<TaskChecklistItem[]>([]);
+  const [taskChecklistLoaded, setTaskChecklistLoaded] = useState(false);
+  const [taskChecklistLoading, setTaskChecklistLoading] = useState(false);
+  const [taskChecklistSaving, setTaskChecklistSaving] = useState(false);
+  const [taskChecklistDraft, setTaskChecklistDraft] = useState("");
   const [activityOpen, setActivityOpen] = useState(false);
   const [taskActivities, setTaskActivities] = useState<TaskActivity[]>([]);
   const [taskActivityLoading, setTaskActivityLoading] = useState(false);
@@ -1737,6 +2110,11 @@ function TasksPageContent() {
   const taskBoardSyncTimerRef = useRef<ReturnType<typeof setTimeout> | null>(null);
   const boardScrollRef = useRef<HTMLDivElement | null>(null);
   const columnNodeRefs = useRef<Map<number, HTMLElement>>(new Map());
+  const taskAttachmentInputRef = useRef<HTMLInputElement | null>(null);
+  const taskFormAttachmentInputRef = useRef<HTMLInputElement | null>(null);
+  const taskChecklistDraftRef = useRef<HTMLInputElement | null>(null);
+  const taskFormChecklistDraftRef = useRef<HTMLInputElement | null>(null);
+  const taskFormResourcesRequestRef = useRef(0);
 
   const sensors = useSensors(
     useSensor(PointerSensor, {
@@ -1792,6 +2170,7 @@ function TasksPageContent() {
         guests,
         guestVisits,
         attendanceRecords,
+        externalLinks,
       ] = await Promise.all([
         apiClient.getTaskLinkedPosts(taskId),
         apiClient.getTaskLinkedMessages(taskId),
@@ -1803,6 +2182,7 @@ function TasksPageContent() {
         apiClient.getTaskLinkedGuests(taskId),
         apiClient.getTaskLinkedGuestVisits(taskId),
         apiClient.getTaskLinkedAttendanceRecords(taskId),
+        apiClient.getTaskExternalLinks(taskId),
       ]);
       setLinkedPosts(posts);
       setLinkedMessages(messages);
@@ -1814,6 +2194,7 @@ function TasksPageContent() {
       setLinkedGuests(guests);
       setLinkedGuestVisits(guestVisits);
       setLinkedAttendanceRecords(attendanceRecords);
+      setTaskExternalLinks(externalLinks);
     } catch (linksError) {
       setError(getTaskError(linksError, "Не удалось загрузить связанные объекты"));
     } finally {
@@ -1833,6 +2214,83 @@ function TasksPageContent() {
     }
   }, []);
 
+  const loadTaskAttachments = useCallback(async (taskId: number) => {
+    setTaskAttachmentsLoading(true);
+    try {
+      const data = await apiClient.getTaskAttachments(taskId);
+      setTaskAttachments(data);
+    } catch (attachmentsError) {
+      setError(getTaskError(attachmentsError, "Не удалось загрузить файлы задачи"));
+    } finally {
+      setTaskAttachmentsLoading(false);
+    }
+  }, []);
+
+  const loadTaskChecklist = useCallback(async (taskId: number) => {
+    setTaskChecklistLoading(true);
+    try {
+      const data = await apiClient.getTaskChecklist(taskId);
+      setTaskChecklist(data);
+      setTaskChecklistLoaded(true);
+    } catch (checklistError) {
+      setError(getTaskError(checklistError, "Не удалось загрузить чек-лист"));
+    } finally {
+      setTaskChecklistLoading(false);
+    }
+  }, []);
+
+  const clearTaskFormResources = useCallback(() => {
+    setTaskFormFilesOpen(false);
+    setTaskFormLinksOpen(false);
+    setTaskFormChecklistOpen(false);
+    setTaskFormChecklistDraft("");
+    setTaskFormResourcesLoading(false);
+    setTaskFormChecklistItems([]);
+    setTaskFormPendingChecklistItems([]);
+    setTaskFormRemovedChecklistItemIds([]);
+    setTaskFormDirtyChecklistItemIds([]);
+    setTaskFormAttachments([]);
+    setTaskFormDocuments([]);
+    setTaskFormEvents([]);
+    setTaskFormExternalLinks([]);
+    setTaskFormPendingFiles([]);
+    setTaskFormPendingDocuments([]);
+    setTaskFormPendingEvents([]);
+    setTaskFormPendingExternalLinks([]);
+    setTaskFormRemovedAttachmentIds([]);
+    setTaskFormRemovedDocumentLinkIds([]);
+    setTaskFormRemovedEventLinkIds([]);
+    setTaskFormRemovedExternalLinkIds([]);
+  }, []);
+
+  const loadTaskFormResources = useCallback(async (taskId: number) => {
+    const requestId = ++taskFormResourcesRequestRef.current;
+    setTaskFormResourcesLoading(true);
+    try {
+      const [checklist, attachments, documents, events, externalLinks] = await Promise.all([
+        apiClient.getTaskChecklist(taskId),
+        apiClient.getTaskAttachments(taskId),
+        apiClient.getTaskLinkedDocuments(taskId),
+        apiClient.getTaskLinkedEvents(taskId),
+        apiClient.getTaskExternalLinks(taskId),
+      ]);
+      if (requestId !== taskFormResourcesRequestRef.current) return;
+      setTaskFormChecklistItems(checklist);
+      setTaskFormAttachments(attachments);
+      setTaskFormDocuments(documents);
+      setTaskFormEvents(events);
+      setTaskFormExternalLinks(externalLinks);
+    } catch (resourcesError) {
+      if (requestId === taskFormResourcesRequestRef.current) {
+        setError(getTaskError(resourcesError, "Не удалось загрузить файлы и связи задачи"));
+      }
+    } finally {
+      if (requestId === taskFormResourcesRequestRef.current) {
+        setTaskFormResourcesLoading(false);
+      }
+    }
+  }, []);
+
   const loadTaskComments = useCallback(async (taskId: number) => {
     setTaskCommentsLoading(true);
     try {
@@ -1845,6 +2303,49 @@ function TasksPageContent() {
     }
   }, []);
 
+  useEffect(() => {
+    if (!linkedItemModalOpen || linkedItemMode === "external_link") {
+      setLinkedItemCandidatesLoading(false);
+      return;
+    }
+
+    let cancelled = false;
+    const timer = window.setTimeout(async () => {
+      setLinkedItemCandidatesLoading(true);
+      try {
+        const searchValue = linkedItemSearch.trim() || undefined;
+        if (linkedItemMode === "document") {
+          const response = await apiClient.getDocuments({
+            search: searchValue,
+            page_size: 100,
+          });
+          if (!cancelled) {
+            setAvailableDocuments(extractApiResults<Document>(response));
+          }
+        } else {
+          const response = await apiClient.getCalendarEvents({
+            search: searchValue,
+            page_size: 100,
+          });
+          if (!cancelled) {
+            setAvailableEvents(extractApiResults<CalendarEvent>(response));
+          }
+        }
+      } catch (candidatesError) {
+        if (!cancelled) {
+          setError(getTaskError(candidatesError, "Не удалось загрузить доступные объекты"));
+        }
+      } finally {
+        if (!cancelled) setLinkedItemCandidatesLoading(false);
+      }
+    }, 250);
+
+    return () => {
+      cancelled = true;
+      window.clearTimeout(timer);
+    };
+  }, [linkedItemModalOpen, linkedItemMode, linkedItemSearch]);
+
   useEffect(() => {
     selectedBoardIdRef.current = selectedBoardId;
   }, [selectedBoardId]);
@@ -1938,6 +2439,37 @@ function TasksPageContent() {
       const boardId = Number(data.data?.board_id);
       if (!Number.isFinite(boardId) || boardId <= 0) return;
 
+      const eventTaskId = Number(
+        data.data?.task_id ?? (
+          data.data?.model === "task" ? data.data?.object_id : undefined
+        ),
+      );
+      if (
+        data.data?.model === "checklist_item" &&
+        checklistOpen &&
+        viewTaskId &&
+        eventTaskId === viewTaskId
+      ) {
+        void loadTaskChecklist(viewTaskId);
+      }
+
+      if (
+        commentsOpen &&
+        viewTaskId &&
+        eventTaskId === viewTaskId &&
+        (
+          data.data?.event === "commented" ||
+          data.data?.event === "comment_edited" ||
+          data.data?.event === "comment_deleted"
+        )
+      ) {
+        void loadTaskComments(viewTaskId);
+      }
+
+      if (activityOpen && viewTaskId && eventTaskId === viewTaskId) {
+        void loadTaskActivity(viewTaskId);
+      }
+
       if (taskBoardSyncTimerRef.current) {
         clearTimeout(taskBoardSyncTimerRef.current);
       }
@@ -1954,7 +2486,16 @@ function TasksPageContent() {
         taskBoardSyncTimerRef.current = null;
       }
     };
-  }, [syncTaskBoardState]);
+  }, [
+    activityOpen,
+    checklistOpen,
+    commentsOpen,
+    loadTaskActivity,
+    loadTaskChecklist,
+    loadTaskComments,
+    syncTaskBoardState,
+    viewTaskId,
+  ]);
 
   useEffect(() => {
     let mounted = true;
@@ -2078,6 +2619,30 @@ function TasksPageContent() {
     return () => document.removeEventListener("mousedown", handlePointerDown);
   }, [cardMenuTaskId]);
 
+  const filteredBoardMembers = useMemo(() => {
+    const query = boardMemberSearch.trim().toLowerCase();
+    if (!query) return employees;
+    return employees.filter((employee) => {
+      const searchable = [
+        displayUserName(employee),
+        employee.email,
+        employee.position?.name,
+      ]
+        .filter(Boolean)
+        .join(" ")
+        .toLowerCase();
+      return searchable.includes(query);
+    });
+  }, [boardMemberSearch, employees]);
+
+  const filteredBoardDepartments = useMemo(() => {
+    const query = boardDepartmentSearch.trim().toLowerCase();
+    if (!query) return departments;
+    return departments.filter((department) => (
+      department.name.toLowerCase().includes(query)
+    ));
+  }, [boardDepartmentSearch, departments]);
+
   const searchedTasks = useMemo(() => {
     const tasks = board?.tasks || [];
     const query = search.trim().toLowerCase();
@@ -2146,9 +2711,34 @@ function TasksPageContent() {
     () => activeColumns.find((column) => column.id === viewTask?.column) || null,
     [activeColumns, viewTask?.column],
   );
-  const linkedObjectsCount = linkedPosts.length + linkedMessages.length + linkedEvents.length + linkedDocuments.length + linkedRequests.length + linkedProcurementRequests.length + linkedEmployees.length + linkedGuests.length + linkedGuestVisits.length + linkedAttendanceRecords.length;
+  const linkedObjectsCount = linkedPosts.length + linkedMessages.length + linkedEvents.length + linkedDocuments.length + linkedRequests.length + linkedProcurementRequests.length + linkedEmployees.length + linkedGuests.length + linkedGuestVisits.length + linkedAttendanceRecords.length + taskExternalLinks.length;
   const linkedObjectsBadgeCount = viewTask?.linked_objects_count ?? linkedObjectsCount;
   const commentsBadgeCount = viewTask?.comments_count ?? taskComments.length;
+  const attachmentsBadgeCount = viewTask?.attachments_count ?? taskAttachments.length;
+  const checklistBadgeTotal = taskChecklistLoaded
+    ? taskChecklist.length
+    : (viewTask?.checklist_total || 0);
+  const checklistBadgeCompleted = taskChecklistLoaded
+    ? taskChecklist.filter((item) => item.is_completed).length
+    : (viewTask?.checklist_completed || 0);
+  const taskFormChecklistTotal = taskFormChecklistItems.length + taskFormPendingChecklistItems.length;
+  const taskFormChecklistCompleted = (
+    taskFormChecklistItems.filter((item) => item.is_completed).length +
+    taskFormPendingChecklistItems.filter((item) => item.is_completed).length
+  );
+  const taskFormChecklistHasInvalidTitle = [
+    ...taskFormChecklistItems.map((item) => item.title),
+    ...taskFormPendingChecklistItems.map((item) => item.title),
+  ].some((title) => !title.trim());
+  const taskFormAttachmentsCount = taskFormAttachments.length + taskFormPendingFiles.length;
+  const taskFormLinksCount = (
+    taskFormDocuments.length +
+    taskFormEvents.length +
+    taskFormExternalLinks.length +
+    taskFormPendingDocuments.length +
+    taskFormPendingEvents.length +
+    taskFormPendingExternalLinks.length
+  );
 
   useEffect(() => {
     if (
@@ -2171,12 +2761,20 @@ function TasksPageContent() {
       setLinkedGuests([]);
       setLinkedGuestVisits([]);
       setLinkedAttendanceRecords([]);
+      setTaskExternalLinks([]);
       setTaskActivities([]);
       setTaskComments([]);
+      setTaskAttachments([]);
+      setTaskChecklist([]);
+      setTaskChecklistLoaded(false);
+      setTaskChecklistDraft("");
       setCommentDraft("");
       setLinkedObjectsOpen(false);
       setCommentsOpen(false);
+      setAttachmentsOpen(false);
+      setChecklistOpen(false);
       setActivityOpen(false);
+      setLinkedItemModalOpen(false);
       return;
     }
 
@@ -2190,6 +2788,16 @@ function TasksPageContent() {
     void loadTaskComments(viewTaskId);
   }, [commentsOpen, loadTaskComments, viewTask?.comments_count, viewTaskId]);
 
+  useEffect(() => {
+    if (!viewTaskId || !attachmentsOpen) return;
+    void loadTaskAttachments(viewTaskId);
+  }, [attachmentsOpen, loadTaskAttachments, viewTask?.attachments_count, viewTaskId]);
+
+  useEffect(() => {
+    if (!viewTaskId || !checklistOpen) return;
+    void loadTaskChecklist(viewTaskId);
+  }, [checklistOpen, loadTaskChecklist, viewTaskId]);
+
   useEffect(() => {
     if (!viewTaskId || !activityOpen) return;
     void loadTaskActivity(viewTaskId);
@@ -2197,6 +2805,8 @@ function TasksPageContent() {
 
   const openCreateTask = useCallback((columnId?: number) => {
     const firstColumn = board?.columns.find((column) => !column.is_archived);
+    taskFormResourcesRequestRef.current += 1;
+    clearTaskFormResources();
     setForm({
       ...emptyForm,
       column: columnId || firstColumn?.id || "",
@@ -2204,7 +2814,7 @@ function TasksPageContent() {
     setLabelName("");
     setLabelColor("#38bdf8");
     setTaskModalOpen(true);
-  }, [board?.columns]);
+  }, [board?.columns, clearTaskFormResources]);
 
   const openTaskView = useCallback((task: TaskCard) => {
     setViewTaskId(task.id);
@@ -2212,6 +2822,8 @@ function TasksPageContent() {
     setViewColumnMenuOpen(false);
     setLinkedObjectsOpen(false);
     setCommentsOpen(false);
+    setAttachmentsOpen(false);
+    setChecklistOpen(true);
     setActivityOpen(false);
     setLinkedMessages([]);
     setLinkedEvents([]);
@@ -2223,6 +2835,12 @@ function TasksPageContent() {
     setLinkedGuestVisits([]);
     setLinkedAttendanceRecords([]);
     setTaskComments([]);
+    setEditingCommentId(null);
+    setEditingCommentDraft("");
+    setTaskAttachments([]);
+    setTaskChecklist([]);
+    setTaskChecklistLoaded(false);
+    setTaskChecklistDraft("");
     setTaskActivities([]);
     setCommentDraft("");
     setCardMenuTaskId(null);
@@ -2233,7 +2851,7 @@ function TasksPageContent() {
   }, []);
 
   const closeTaskView = useCallback(() => {
-    if (saving) return;
+    if (saving || taskAttachmentsUploading || taskChecklistSaving) return;
     setViewTaskId(null);
     setTaskMenuOpen(false);
     setViewColumnMenuOpen(false);
@@ -2247,14 +2865,24 @@ function TasksPageContent() {
     setLinkedGuestVisits([]);
     setLinkedAttendanceRecords([]);
     setTaskComments([]);
+    setEditingCommentId(null);
+    setEditingCommentDraft("");
+    setTaskAttachments([]);
+    setTaskChecklist([]);
+    setTaskChecklistLoaded(false);
     setTaskActivities([]);
     setLinkedObjectsOpen(false);
     setCommentsOpen(false);
+    setAttachmentsOpen(false);
+    setChecklistOpen(false);
     setActivityOpen(false);
     setCommentDraft("");
-  }, [saving]);
+    setTaskChecklistDraft("");
+  }, [saving, taskAttachmentsUploading, taskChecklistSaving]);
 
   const openEditTask = useCallback((task: TaskCard) => {
+    taskFormResourcesRequestRef.current += 1;
+    clearTaskFormResources();
     setForm({
       id: task.id,
       title: task.title,
@@ -2272,17 +2900,22 @@ function TasksPageContent() {
     setViewColumnMenuOpen(false);
     setCardMenuTaskId(null);
     setTaskModalOpen(true);
-  }, []);
+    void loadTaskFormResources(task.id);
+  }, [clearTaskFormResources, loadTaskFormResources]);
 
   const closeTaskModal = useCallback(() => {
     if (saving) return;
+    taskFormResourcesRequestRef.current += 1;
     setTaskModalOpen(false);
     setForm(emptyForm);
     setLabelName("");
-  }, [saving]);
+    clearTaskFormResources();
+  }, [clearTaskFormResources, saving]);
 
   const openCreateBoard = useCallback(() => {
     setBoardForm(emptyBoardForm);
+    setBoardMemberSearch("");
+    setBoardDepartmentSearch("");
     setBoardActionsMenuOpen(false);
     setBoardModalOpen(true);
   }, []);
@@ -2295,10 +2928,14 @@ function TasksPageContent() {
       id: board.id,
       name: board.name || "",
       description: board.description || "",
-      access: memberIds.length > 0 || departmentIds.length > 0 ? "restricted" : "all",
+      access: board.access_scope || (
+        memberIds.length > 0 || departmentIds.length > 0 ? "restricted" : "all"
+      ),
       member_ids: memberIds,
       department_ids: departmentIds,
     });
+    setBoardMemberSearch("");
+    setBoardDepartmentSearch("");
     setBoardActionsMenuOpen(false);
     setBoardModalOpen(true);
   }, [board]);
@@ -2307,6 +2944,8 @@ function TasksPageContent() {
     if (saving) return;
     setBoardModalOpen(false);
     setBoardForm(emptyBoardForm);
+    setBoardMemberSearch("");
+    setBoardDepartmentSearch("");
   }, [saving]);
 
   const openCreateColumn = useCallback(() => {
@@ -2427,6 +3066,7 @@ function TasksPageContent() {
       const payload = {
         name: boardForm.name.trim(),
         description: boardForm.description.trim(),
+        access_scope: boardForm.access,
         members: boardForm.access === "restricted" ? boardForm.member_ids : [],
         departments: boardForm.access === "restricted" ? boardForm.department_ids : [],
       };
@@ -2482,8 +3122,110 @@ function TasksPageContent() {
     }
   }, [board, columnForm.color, columnForm.is_done, columnForm.name, loadBoard]);
 
+  const persistTaskFormResources = useCallback(async (taskId: number) => {
+    for (const itemId of [...taskFormRemovedChecklistItemIds]) {
+      await apiClient.deleteTaskChecklistItem(taskId, itemId);
+      setTaskFormRemovedChecklistItemIds((current) => current.filter((id) => id !== itemId));
+    }
+
+    for (const itemId of [...taskFormDirtyChecklistItemIds]) {
+      const item = taskFormChecklistItems.find((currentItem) => currentItem.id === itemId);
+      if (!item) continue;
+      const updated = await apiClient.updateTaskChecklistItem(taskId, item.id, {
+        title: item.title.trim(),
+        is_completed: item.is_completed,
+      });
+      setTaskFormDirtyChecklistItemIds((current) => current.filter((id) => id !== itemId));
+      setTaskFormChecklistItems((current) => current.map((currentItem) => (
+        currentItem.id === updated.id ? updated : currentItem
+      )));
+    }
+
+    for (const item of [...taskFormPendingChecklistItems]) {
+      const created = await apiClient.addTaskChecklistItem(taskId, {
+        title: item.title.trim(),
+        position: item.position,
+        is_completed: item.is_completed,
+      });
+      setTaskFormPendingChecklistItems((current) => (
+        current.filter((currentItem) => currentItem.key !== item.key)
+      ));
+      setTaskFormChecklistItems((current) => [...current, created]);
+    }
+
+    for (const attachmentId of [...taskFormRemovedAttachmentIds]) {
+      await apiClient.deleteTaskAttachment(taskId, attachmentId);
+      setTaskFormRemovedAttachmentIds((current) => (
+        current.filter((id) => id !== attachmentId)
+      ));
+    }
+
+    for (const linkId of [...taskFormRemovedDocumentLinkIds]) {
+      await apiClient.unlinkTaskDocument(taskId, linkId);
+      setTaskFormRemovedDocumentLinkIds((current) => current.filter((id) => id !== linkId));
+    }
+
+    for (const linkId of [...taskFormRemovedEventLinkIds]) {
+      await apiClient.unlinkTaskCalendarEvent(taskId, linkId);
+      setTaskFormRemovedEventLinkIds((current) => current.filter((id) => id !== linkId));
+    }
+
+    for (const linkId of [...taskFormRemovedExternalLinkIds]) {
+      await apiClient.deleteTaskExternalLink(taskId, linkId);
+      setTaskFormRemovedExternalLinkIds((current) => current.filter((id) => id !== linkId));
+    }
+
+    for (const document of [...taskFormPendingDocuments]) {
+      const linked = await apiClient.linkTaskDocument(taskId, document.id);
+      setTaskFormPendingDocuments((current) => current.filter((item) => item.id !== document.id));
+      setTaskFormDocuments((current) => (
+        current.some((item) => item.id === linked.id) ? current : [...current, linked]
+      ));
+    }
+
+    for (const event of [...taskFormPendingEvents]) {
+      const linked = await apiClient.linkTaskCalendarEvent(taskId, event.id);
+      setTaskFormPendingEvents((current) => current.filter((item) => item.id !== event.id));
+      setTaskFormEvents((current) => (
+        current.some((item) => item.id === linked.id) ? current : [...current, linked]
+      ));
+    }
+
+    for (const link of [...taskFormPendingExternalLinks]) {
+      const created = await apiClient.addTaskExternalLink(taskId, {
+        url: link.url,
+        title: link.title || undefined,
+      });
+      setTaskFormPendingExternalLinks((current) => (
+        current.filter((item) => item.key !== link.key)
+      ));
+      setTaskFormExternalLinks((current) => (
+        current.some((item) => item.id === created.id) ? current : [...current, created]
+      ));
+    }
+
+    for (const file of [...taskFormPendingFiles]) {
+      const uploaded = await apiClient.uploadTaskAttachments(taskId, [file]);
+      setTaskFormPendingFiles((current) => current.filter((item) => item !== file));
+      setTaskFormAttachments((current) => [...current, ...uploaded]);
+    }
+  }, [
+    taskFormChecklistItems,
+    taskFormDirtyChecklistItemIds,
+    taskFormPendingDocuments,
+    taskFormPendingEvents,
+    taskFormPendingExternalLinks,
+    taskFormPendingFiles,
+    taskFormPendingChecklistItems,
+    taskFormRemovedAttachmentIds,
+    taskFormRemovedChecklistItemIds,
+    taskFormRemovedDocumentLinkIds,
+    taskFormRemovedEventLinkIds,
+    taskFormRemovedExternalLinkIds,
+  ]);
+
   const saveTask = useCallback(async () => {
-    if (!board || !form.title.trim() || !form.column) return;
+    if (!board || !form.title.trim() || !form.column || taskFormChecklistHasInvalidTitle) return;
     setSaving(true);
     setError(null);
     const payload = {
@@ -2496,20 +3238,46 @@ function TasksPageContent() {
       due_date: form.due_date || null,
       label_ids: form.label_ids,
     };
+    let savedTaskId = form.id || null;
+    let primaryDataSaved = false;
     try {
-      if (form.id) {
-        await apiClient.updateTask(form.id, payload);
-      } else {
-        await apiClient.createTask(payload);
+      const savedTask = form.id
+        ? await apiClient.updateTask(form.id, payload)
+        : await apiClient.createTask(payload);
+      savedTaskId = savedTask.id;
+      primaryDataSaved = true;
+      if (!form.id) {
+        setForm((current) => ({ ...current, id: savedTask.id }));
       }
+
+      await persistTaskFormResources(savedTask.id);
       await loadBoard(board.id);
       closeTaskModal();
     } catch (saveError) {
-      setError(getTaskError(saveError, "Не удалось сохранить задачу"));
+      if (primaryDataSaved && savedTaskId) {
+        try {
+          await loadBoard(board.id);
+        } catch {
+          // Исходная ошибка сохранения ресурса важнее ошибки обновления доски.
+        }
+        setError(getTaskError(
+          saveError,
+          "Основные данные сохранены, но не удалось сохранить чек-лист, файлы или связи",
+        ));
+      } else {
+        setError(getTaskError(saveError, "Не удалось сохранить задачу"));
+      }
     } finally {
       setSaving(false);
     }
-  }, [board, closeTaskModal, form, loadBoard]);
+  }, [
+    board,
+    closeTaskModal,
+    form,
+    loadBoard,
+    persistTaskFormResources,
+    taskFormChecklistHasInvalidTitle,
+  ]);
 
   const createLabel = useCallback(async () => {
     if (!board || !labelName.trim()) return;
@@ -2570,6 +3338,381 @@ function TasksPageContent() {
     await deleteTask(viewTask);
   }, [deleteTask, viewTask]);
 
+  const uploadViewedTaskAttachments = useCallback(async (files: File[]) => {
+    if (!board || !viewTask || taskAttachmentsUploading || files.length === 0) return;
+
+    setTaskAttachmentsUploading(true);
+    setError(null);
+    try {
+      const created = await apiClient.uploadTaskAttachments(viewTask.id, files);
+      setTaskAttachments((current) => [...current, ...created]);
+      await loadBoard(board.id);
+      if (activityOpen) await loadTaskActivity(viewTask.id);
+    } catch (attachmentError) {
+      setError(getTaskError(attachmentError, "Не удалось загрузить файлы"));
+    } finally {
+      setTaskAttachmentsUploading(false);
+    }
+  }, [activityOpen, board, loadBoard, loadTaskActivity, taskAttachmentsUploading, viewTask]);
+
+  const downloadViewedTaskAttachment = useCallback(async (attachment: TaskAttachment) => {
+    if (!viewTask) return;
+    setError(null);
+    try {
+      const { blob, filename } = await apiClient.downloadTaskAttachment(
+        viewTask.id,
+        attachment,
+      );
+      const url = URL.createObjectURL(blob);
+      const link = document.createElement("a");
+      link.href = url;
+      link.download = filename;
+      document.body.appendChild(link);
+      link.click();
+      link.remove();
+      URL.revokeObjectURL(url);
+    } catch (attachmentError) {
+      setError(getTaskError(attachmentError, "Не удалось скачать файл"));
+    }
+  }, [viewTask]);
+
+  const deleteViewedTaskAttachment = useCallback(async (attachment: TaskAttachment) => {
+    if (!board || !viewTask || taskAttachmentsUploading) return;
+    if (!window.confirm(`Удалить файл "${attachment.file_name}"?`)) return;
+
+    setTaskAttachmentsUploading(true);
+    setError(null);
+    try {
+      await apiClient.deleteTaskAttachment(viewTask.id, attachment.id);
+      setTaskAttachments((current) => current.filter((item) => item.id !== attachment.id));
+      await loadBoard(board.id);
+      if (activityOpen) await loadTaskActivity(viewTask.id);
+    } catch (attachmentError) {
+      setError(getTaskError(attachmentError, "Не удалось удалить файл"));
+    } finally {
+      setTaskAttachmentsUploading(false);
+    }
+  }, [activityOpen, board, loadBoard, loadTaskActivity, taskAttachmentsUploading, viewTask]);
+
+  const addViewedTaskChecklistItem = useCallback(async () => {
+    const title = taskChecklistDraft.trim();
+    if (!board || !viewTask || !title || taskChecklistSaving) return;
+
+    setTaskChecklistSaving(true);
+    setError(null);
+    try {
+      const created = await apiClient.addTaskChecklistItem(viewTask.id, { title });
+      setTaskChecklist((current) => [
+        ...current.filter((item) => item.id !== created.id),
+        created,
+      ].sort((left, right) => left.position - right.position || left.id - right.id));
+      setTaskChecklistLoaded(true);
+      setTaskChecklistDraft("");
+      await loadBoard(board.id);
+      if (activityOpen) await loadTaskActivity(viewTask.id);
+      window.requestAnimationFrame(() => taskChecklistDraftRef.current?.focus());
+    } catch (checklistError) {
+      setError(getTaskError(checklistError, "Не удалось добавить пункт чек-листа"));
+    } finally {
+      setTaskChecklistSaving(false);
+    }
+  }, [
+    activityOpen,
+    board,
+    loadBoard,
+    loadTaskActivity,
+    taskChecklistDraft,
+    taskChecklistSaving,
+    viewTask,
+  ]);
+
+  const toggleViewedTaskChecklistItem = useCallback(async (item: TaskChecklistItem) => {
+    if (!board || !viewTask || taskChecklistSaving) return;
+
+    setTaskChecklistSaving(true);
+    setError(null);
+    try {
+      const updated = await apiClient.updateTaskChecklistItem(viewTask.id, item.id, {
+        is_completed: !item.is_completed,
+      });
+      setTaskChecklist((current) => current.map((currentItem) => (
+        currentItem.id === updated.id ? updated : currentItem
+      )));
+      setTaskChecklistLoaded(true);
+      await loadBoard(board.id);
+      if (activityOpen) await loadTaskActivity(viewTask.id);
+    } catch (checklistError) {
+      setError(getTaskError(checklistError, "Не удалось изменить пункт чек-листа"));
+    } finally {
+      setTaskChecklistSaving(false);
+    }
+  }, [activityOpen, board, loadBoard, loadTaskActivity, taskChecklistSaving, viewTask]);
+
+  const deleteViewedTaskChecklistItem = useCallback(async (item: TaskChecklistItem) => {
+    if (!board || !viewTask || taskChecklistSaving) return;
+
+    setTaskChecklistSaving(true);
+    setError(null);
+    try {
+      await apiClient.deleteTaskChecklistItem(viewTask.id, item.id);
+      setTaskChecklist((current) => current.filter((currentItem) => currentItem.id !== item.id));
+      setTaskChecklistLoaded(true);
+      await loadBoard(board.id);
+      if (activityOpen) await loadTaskActivity(viewTask.id);
+    } catch (checklistError) {
+      setError(getTaskError(checklistError, "Не удалось удалить пункт чек-листа"));
+    } finally {
+      setTaskChecklistSaving(false);
+    }
+  }, [activityOpen, board, loadBoard, loadTaskActivity, taskChecklistSaving, viewTask]);
+
+  const addTaskFormChecklistItem = useCallback(() => {
+    const title = taskFormChecklistDraft.trim();
+    if (!title) return;
+    const maxPosition = Math.max(
+      0,
+      ...taskFormChecklistItems.map((item) => item.position),
+      ...taskFormPendingChecklistItems.map((item) => item.position),
+    );
+    setTaskFormPendingChecklistItems((current) => [
+      ...current,
+      {
+        key: `checklist-${Date.now()}-${Math.random().toString(36).slice(2)}`,
+        title,
+        position: maxPosition + 1000,
+        is_completed: false,
+      },
+    ]);
+    setTaskFormChecklistDraft("");
+    setTaskFormChecklistOpen(true);
+    window.requestAnimationFrame(() => taskFormChecklistDraftRef.current?.focus());
+  }, [taskFormChecklistDraft, taskFormChecklistItems, taskFormPendingChecklistItems]);
+
+  const updateExistingTaskFormChecklistItem = useCallback((
+    itemId: number,
+    patch: Partial<Pick<TaskChecklistItem, "title" | "is_completed">>,
+  ) => {
+    setTaskFormChecklistItems((current) => current.map((item) => (
+      item.id === itemId ? { ...item, ...patch } : item
+    )));
+    setTaskFormDirtyChecklistItemIds((current) => (
+      current.includes(itemId) ? current : [...current, itemId]
+    ));
+  }, []);
+
+  const updatePendingTaskFormChecklistItem = useCallback((
+    key: string,
+    patch: Partial<Pick<TaskFormChecklistItemDraft, "title" | "is_completed">>,
+  ) => {
+    setTaskFormPendingChecklistItems((current) => current.map((item) => (
+      item.key === key ? { ...item, ...patch } : item
+    )));
+  }, []);
+
+  const removeExistingTaskFormChecklistItem = useCallback((item: TaskChecklistItem) => {
+    setTaskFormChecklistItems((current) => current.filter((currentItem) => currentItem.id !== item.id));
+    setTaskFormRemovedChecklistItemIds((current) => (
+      current.includes(item.id) ? current : [...current, item.id]
+    ));
+    setTaskFormDirtyChecklistItemIds((current) => current.filter((id) => id !== item.id));
+  }, []);
+
+  const addFilesToTaskForm = useCallback((files: File[]) => {
+    if (files.length === 0) return;
+    setTaskFormFilesOpen(true);
+    setTaskFormPendingFiles((current) => {
+      const keys = new Set(
+        current.map((file) => `${file.name}:${file.size}:${file.lastModified}`),
+      );
+      return [
+        ...current,
+        ...files.filter((file) => {
+          const key = `${file.name}:${file.size}:${file.lastModified}`;
+          if (keys.has(key)) return false;
+          keys.add(key);
+          return true;
+        }),
+      ];
+    });
+  }, []);
+
+  const removeExistingTaskFormAttachment = useCallback((attachment: TaskAttachment) => {
+    setTaskFormAttachments((current) => current.filter((item) => item.id !== attachment.id));
+    setTaskFormRemovedAttachmentIds((current) => [...current, attachment.id]);
+  }, []);
+
+  const removeExistingTaskFormDocument = useCallback((link: TaskLinkedDocument) => {
+    setTaskFormDocuments((current) => current.filter((item) => item.id !== link.id));
+    setTaskFormRemovedDocumentLinkIds((current) => [...current, link.id]);
+  }, []);
+
+  const removeExistingTaskFormEvent = useCallback((link: TaskLinkedCalendarEvent) => {
+    setTaskFormEvents((current) => current.filter((item) => item.id !== link.id));
+    setTaskFormRemovedEventLinkIds((current) => [...current, link.id]);
+  }, []);
+
+  const removeExistingTaskFormExternalLink = useCallback((link: TaskExternalLink) => {
+    setTaskFormExternalLinks((current) => current.filter((item) => item.id !== link.id));
+    setTaskFormRemovedExternalLinkIds((current) => [...current, link.id]);
+  }, []);
+
+  const openLinkedItemModalForView = useCallback(() => {
+    if (!viewTask) return;
+    setLinkedItemTarget("view");
+    setLinkedItemMode("document");
+    setLinkedItemSearch("");
+    setExternalLinkUrl("");
+    setExternalLinkTitle("");
+    setLinkedObjectsOpen(true);
+    setLinkedItemModalOpen(true);
+  }, [viewTask]);
+
+  const openLinkedItemModalForForm = useCallback(() => {
+    if (!taskModalOpen) return;
+    setLinkedItemTarget("form");
+    setLinkedItemMode("document");
+    setLinkedItemSearch("");
+    setExternalLinkUrl("");
+    setExternalLinkTitle("");
+    setTaskFormLinksOpen(true);
+    setLinkedItemModalOpen(true);
+  }, [taskModalOpen]);
+
+  const closeLinkedItemModal = useCallback(() => {
+    if (saving) return;
+    setLinkedItemModalOpen(false);
+    setLinkedItemSearch("");
+    setExternalLinkUrl("");
+    setExternalLinkTitle("");
+  }, [saving]);
+
+  const refreshViewedTaskLinks = useCallback(async () => {
+    if (!board || !viewTask) return;
+    await Promise.all([
+      loadTaskLinkedObjects(viewTask.id),
+      loadBoard(board.id),
+    ]);
+    if (activityOpen) await loadTaskActivity(viewTask.id);
+  }, [activityOpen, board, loadBoard, loadTaskActivity, loadTaskLinkedObjects, viewTask]);
+
+  const linkDocumentToViewedTask = useCallback(async (documentId: number) => {
+    if (!viewTask || saving) return;
+    setSaving(true);
+    setError(null);
+    try {
+      await apiClient.linkTaskDocument(viewTask.id, documentId);
+      await refreshViewedTaskLinks();
+      setLinkedItemModalOpen(false);
+    } catch (linkError) {
+      setError(getTaskError(linkError, "Не удалось связать документ с задачей"));
+    } finally {
+      setSaving(false);
+    }
+  }, [refreshViewedTaskLinks, saving, viewTask]);
+
+  const linkEventToViewedTask = useCallback(async (eventId: number) => {
+    if (!viewTask || saving) return;
+    setSaving(true);
+    setError(null);
+    try {
+      await apiClient.linkTaskCalendarEvent(viewTask.id, eventId);
+      await refreshViewedTaskLinks();
+      setLinkedItemModalOpen(false);
+    } catch (linkError) {
+      setError(getTaskError(linkError, "Не удалось связать событие с задачей"));
+    } finally {
+      setSaving(false);
+    }
+  }, [refreshViewedTaskLinks, saving, viewTask]);
+
+  const addExternalLinkToViewedTask = useCallback(async () => {
+    if (!viewTask || saving) return;
+    const url = normalizeExternalUrl(externalLinkUrl);
+    if (!url) return;
+
+    setSaving(true);
+    setError(null);
+    try {
+      await apiClient.addTaskExternalLink(viewTask.id, {
+        url,
+        title: externalLinkTitle.trim() || undefined,
+      });
+      await refreshViewedTaskLinks();
+      setLinkedItemModalOpen(false);
+      setExternalLinkUrl("");
+      setExternalLinkTitle("");
+    } catch (linkError) {
+      setError(getTaskError(linkError, "Не удалось добавить ссылку"));
+    } finally {
+      setSaving(false);
+    }
+  }, [externalLinkTitle, externalLinkUrl, refreshViewedTaskLinks, saving, viewTask]);
+
+  const addDocumentToTaskForm = useCallback((document: Document) => {
+    const isExisting = taskFormDocuments.some((link) => link.document_id === document.id);
+    const isPending = taskFormPendingDocuments.some((item) => item.id === document.id);
+    if (isExisting || isPending) return;
+    setTaskFormPendingDocuments((current) => [...current, document]);
+    setTaskFormLinksOpen(true);
+    setLinkedItemModalOpen(false);
+  }, [taskFormDocuments, taskFormPendingDocuments]);
+
+  const addEventToTaskForm = useCallback((event: CalendarEvent) => {
+    const isExisting = taskFormEvents.some((link) => link.event_id === event.id);
+    const isPending = taskFormPendingEvents.some((item) => item.id === event.id);
+    if (isExisting || isPending) return;
+    setTaskFormPendingEvents((current) => [...current, event]);
+    setTaskFormLinksOpen(true);
+    setLinkedItemModalOpen(false);
+  }, [taskFormEvents, taskFormPendingEvents]);
+
+  const addExternalLinkToTaskForm = useCallback(() => {
+    const url = normalizeExternalUrl(externalLinkUrl);
+    if (!url) return;
+    const duplicate = (
+      taskFormExternalLinks.some((link) => link.url === url) ||
+      taskFormPendingExternalLinks.some((link) => link.url === url)
+    );
+    if (duplicate) {
+      setError("Эта ссылка уже добавлена к задаче");
+      return;
+    }
+
+    setTaskFormPendingExternalLinks((current) => [
+      ...current,
+      {
+        key: `${Date.now()}-${current.length}`,
+        url,
+        title: externalLinkTitle.trim(),
+      },
+    ]);
+    setTaskFormLinksOpen(true);
+    setLinkedItemModalOpen(false);
+    setExternalLinkUrl("");
+    setExternalLinkTitle("");
+  }, [
+    externalLinkTitle,
+    externalLinkUrl,
+    taskFormExternalLinks,
+    taskFormPendingExternalLinks,
+  ]);
+
+  const deleteExternalLinkFromViewedTask = useCallback(async (linkId: number) => {
+    if (!viewTask || saving) return;
+    if (!window.confirm("Удалить ссылку из задачи?")) return;
+
+    setSaving(true);
+    setError(null);
+    try {
+      await apiClient.deleteTaskExternalLink(viewTask.id, linkId);
+      await refreshViewedTaskLinks();
+    } catch (linkError) {
+      setError(getTaskError(linkError, "Не удалось удалить ссылку"));
+    } finally {
+      setSaving(false);
+    }
+  }, [refreshViewedTaskLinks, saving, viewTask]);
+
   const addViewedTaskComment = useCallback(async () => {
     if (!board || !viewTask || saving || !commentDraft.trim()) return;
 
@@ -2577,15 +3720,50 @@ function TasksPageContent() {
     setError(null);
     try {
       const created = await apiClient.addTaskComment(viewTask.id, commentDraft.trim());
-      setTaskComments((current) => [...current, created]);
+      setTaskComments((current) => [
+        ...current.filter((comment) => comment.id !== created.id),
+        created,
+      ]);
       setCommentDraft("");
       await loadBoard(board.id);
+      if (activityOpen) await loadTaskActivity(viewTask.id);
     } catch (commentError) {
       setError(getTaskError(commentError, "Не удалось добавить комментарий"));
     } finally {
       setSaving(false);
     }
-  }, [board, commentDraft, loadBoard, saving, viewTask]);
+  }, [activityOpen, board, commentDraft, loadBoard, loadTaskActivity, saving, viewTask]);
+
+  const beginEditingViewedTaskComment = useCallback((comment: TaskComment) => {
+    setEditingCommentId(comment.id);
+    setEditingCommentDraft(comment.text);
+  }, []);
+
+  const cancelEditingViewedTaskComment = useCallback(() => {
+    setEditingCommentId(null);
+    setEditingCommentDraft("");
+  }, []);
+
+  const updateViewedTaskComment = useCallback(async () => {
+    const text = editingCommentDraft.trim();
+    if (!viewTask || !editingCommentId || !text || saving) return;
+
+    setSaving(true);
+    setError(null);
+    try {
+      const updated = await apiClient.updateTaskComment(viewTask.id, editingCommentId, text);
+      setTaskComments((current) => current.map((comment) => (
+        comment.id === updated.id ? updated : comment
+      )));
+      setEditingCommentId(null);
+      setEditingCommentDraft("");
+      if (activityOpen) await loadTaskActivity(viewTask.id);
+    } catch (commentError) {
+      setError(getTaskError(commentError, "Не удалось изменить комментарий"));
+    } finally {
+      setSaving(false);
+    }
+  }, [activityOpen, editingCommentDraft, editingCommentId, loadTaskActivity, saving, viewTask]);
 
   const deleteViewedTaskComment = useCallback(async (commentId: number) => {
     if (!board || !viewTask || saving) return;
@@ -2595,13 +3773,18 @@ function TasksPageContent() {
     try {
       await apiClient.deleteTaskComment(viewTask.id, commentId);
       setTaskComments((current) => current.filter((comment) => comment.id !== commentId));
+      if (editingCommentId === commentId) {
+        setEditingCommentId(null);
+        setEditingCommentDraft("");
+      }
       await loadBoard(board.id);
+      if (activityOpen) await loadTaskActivity(viewTask.id);
     } catch (commentError) {
       setError(getTaskError(commentError, "Не удалось удалить комментарий"));
     } finally {
       setSaving(false);
     }
-  }, [board, loadBoard, saving, viewTask]);
+  }, [activityOpen, board, editingCommentId, loadBoard, loadTaskActivity, saving, viewTask]);
 
   const unlinkPostFromViewedTask = useCallback(async (linkId: number) => {
     if (!board || !viewTask || saving) return;
@@ -2794,6 +3977,70 @@ function TasksPageContent() {
     }
   }, [activityOpen, board, loadBoard, loadTaskActivity, saving, viewTask]);
 
+  const claimTask = useCallback(async (task: TaskCard) => {
+    if (
+      !board ||
+      task.assignee ||
+      task.completed_at ||
+      claimingTaskId !== null
+    ) {
+      return;
+    }
+
+    setClaimingTaskId(task.id);
+    setCardMenuTaskId(null);
+    setError(null);
+    try {
+      await apiClient.claimTask(task.id);
+      await loadBoard(board.id);
+      if (activityOpen && viewTaskId === task.id) {
+        await loadTaskActivity(task.id);
+      }
+    } catch (claimError) {
+      setError(getTaskError(claimError, "Не удалось взять задачу в работу"));
+      await loadBoard(board.id);
+    } finally {
+      setClaimingTaskId(null);
+    }
+  }, [activityOpen, board, claimingTaskId, loadBoard, loadTaskActivity, viewTaskId]);
+
+  const completeTask = useCallback(async (task: TaskCard) => {
+    if (
+      !board ||
+      !user?.id ||
+      task.assignee?.id !== user.id ||
+      task.completed_at ||
+      completingTaskId !== null
+    ) {
+      return;
+    }
+
+    setCompletingTaskId(task.id);
+    setCardMenuTaskId(null);
+    setViewColumnMenuOpen(false);
+    setError(null);
+    try {
+      await apiClient.completeTask(task.id);
+      await loadBoard(board.id);
+      if (activityOpen && viewTaskId === task.id) {
+        await loadTaskActivity(task.id);
+      }
+    } catch (completeError) {
+      setError(getTaskError(completeError, "Не удалось завершить задачу"));
+      await loadBoard(board.id);
+    } finally {
+      setCompletingTaskId(null);
+    }
+  }, [
+    activityOpen,
+    board,
+    completingTaskId,
+    loadBoard,
+    loadTaskActivity,
+    user?.id,
+    viewTaskId,
+  ]);
+
   const handleDragStart = useCallback((event: DragStartEvent) => {
     const taskId = Number(String(event.active.id).replace("task-", ""));
     setActiveTaskId(Number.isFinite(taskId) ? taskId : null);
@@ -2853,7 +4100,7 @@ function TasksPageContent() {
               <button
                 type="button"
                 onClick={() => changeDesktopWideMode(!desktopWideMode)}
-                className="app-action-secondary hidden h-10 w-10 items-center justify-center rounded-lg lg:inline-flex"
+                className="app-action-ghost hidden h-8 w-8 items-center justify-center rounded-md lg:inline-flex"
                 title={desktopWideMode ? "Вернуть обычный вид" : "Развернуть доску"}
                 aria-label={desktopWideMode ? "Вернуть обычный вид" : "Развернуть доску"}
                 aria-pressed={desktopWideMode}
@@ -3105,6 +4352,11 @@ function TasksPageContent() {
                   onOpenTask={openTaskView}
                   onEditTask={openEditTask}
                   onDeleteTask={deleteTask}
+                  currentUserId={user?.id}
+                  claimingTaskId={claimingTaskId}
+                  onClaimTask={claimTask}
+                  completingTaskId={completingTaskId}
+                  onCompleteTask={completeTask}
                   openMenuTaskId={cardMenuTaskId}
                   menuRef={cardMenuRef}
                   onToggleTaskMenu={toggleCardTaskMenu}
@@ -3174,7 +4426,7 @@ function TasksPageContent() {
 
           <div>
             <span className="app-text-muted mb-2 block text-xs font-medium">Доступ</span>
-            <div className="grid gap-2 sm:grid-cols-2">
+            <div className="grid gap-2 sm:grid-cols-3">
               <button
                 type="button"
                 onClick={() => setBoardForm((current) => ({ ...current, access: "all" }))}
@@ -3186,6 +4438,17 @@ function TasksPageContent() {
               >
                 Для всех
               </button>
+              <button
+                type="button"
+                onClick={() => setBoardForm((current) => ({ ...current, access: "private" }))}
+                className={`rounded-xl border px-3 py-2 text-left text-sm font-medium transition ${
+                  boardForm.access === "private"
+                    ? "app-selected border-[var(--accent-primary)]"
+                    : "border-[var(--border-subtle)] text-[var(--muted-foreground)] hover:border-[var(--border-strong)]"
+                }`}
+              >
+                Для себя
+              </button>
               <button
                 type="button"
                 onClick={() => setBoardForm((current) => ({ ...current, access: "restricted" }))}
@@ -3209,26 +4472,57 @@ function TasksPageContent() {
                     {boardForm.member_ids.length}
                   </span>
                 </div>
+                <div className="relative mb-2">
+                  <Search
+                    size={14}
+                    className="app-text-muted pointer-events-none absolute left-2.5 top-1/2 -translate-y-1/2"
+                  />
+                  <input
+                    value={boardMemberSearch}
+                    onChange={(event) => setBoardMemberSearch(event.target.value)}
+                    className="app-input w-full rounded-xl py-2 pl-8 pr-3 text-xs"
+                    placeholder="Поиск сотрудников"
+                    aria-label="Поиск сотрудников"
+                  />
+                </div>
                 <div className="tasks-column-scroll app-surface-muted max-h-52 space-y-1 overflow-y-auto rounded-xl border border-[var(--border-subtle)] p-2">
-                  {employees.length > 0 ? (
-                    employees.map((employee) => (
-                      <label
-                        key={employee.id}
-                        className="flex cursor-pointer items-center gap-2 rounded-lg px-2 py-1.5 text-sm transition hover:bg-[var(--surface-elevated)]"
-                      >
-                        <input
-                          type="checkbox"
-                          checked={boardForm.member_ids.includes(employee.id)}
-                          onChange={() => toggleBoardMember(employee.id)}
-                          className="h-4 w-4"
-                        />
-                        <span className="min-w-0 truncate text-[var(--foreground)]">
-                          {displayUserName(employee)}
-                        </span>
-                      </label>
-                    ))
+                  {filteredBoardMembers.length > 0 ? (
+                    filteredBoardMembers.map((employee) => {
+                      const employeeName = displayUserName(employee);
+                      return (
+                        <label
+                          key={employee.id}
+                          className="flex cursor-pointer items-center gap-2 rounded-lg px-2 py-1.5 text-sm transition hover:bg-[var(--surface-elevated)]"
+                        >
+                          <input
+                            type="checkbox"
+                            checked={boardForm.member_ids.includes(employee.id)}
+                            onChange={() => toggleBoardMember(employee.id)}
+                            className="h-4 w-4 shrink-0"
+                          />
+                          <RequestAvatar
+                            alt={employeeName}
+                            fallback={getEmployeeInitials(employee)}
+                            src={employee.avatar}
+                            size="sm"
+                          />
+                          <span className="min-w-0 flex-1">
+                            <span className="block truncate text-xs font-medium text-[var(--foreground)]">
+                              {employeeName}
+                            </span>
+                            {employee.email ? (
+                              <span className="app-text-muted block truncate text-[10px]">
+                                {employee.email}
+                              </span>
+                            ) : null}
+                          </span>
+                        </label>
+                      );
+                    })
                   ) : (
-                    <p className="app-text-muted px-2 py-4 text-center text-xs">Нет сотрудников</p>
+                    <p className="app-text-muted px-2 py-4 text-center text-xs">
+                      Сотрудники не найдены
+                    </p>
                   )}
                 </div>
               </div>
@@ -3240,9 +4534,22 @@ function TasksPageContent() {
                     {boardForm.department_ids.length}
                   </span>
                 </div>
+                <div className="relative mb-2">
+                  <Search
+                    size={14}
+                    className="app-text-muted pointer-events-none absolute left-2.5 top-1/2 -translate-y-1/2"
+                  />
+                  <input
+                    value={boardDepartmentSearch}
+                    onChange={(event) => setBoardDepartmentSearch(event.target.value)}
+                    className="app-input w-full rounded-xl py-2 pl-8 pr-3 text-xs"
+                    placeholder="Поиск отделов"
+                    aria-label="Поиск отделов"
+                  />
+                </div>
                 <div className="tasks-column-scroll app-surface-muted max-h-52 space-y-1 overflow-y-auto rounded-xl border border-[var(--border-subtle)] p-2">
-                  {departments.length > 0 ? (
-                    departments.map((department) => (
+                  {filteredBoardDepartments.length > 0 ? (
+                    filteredBoardDepartments.map((department) => (
                       <label
                         key={department.id}
                         className="flex cursor-pointer items-center gap-2 rounded-lg px-2 py-1.5 text-sm transition hover:bg-[var(--surface-elevated)]"
@@ -3259,7 +4566,9 @@ function TasksPageContent() {
                       </label>
                     ))
                   ) : (
-                    <p className="app-text-muted px-2 py-4 text-center text-xs">Нет отделов</p>
+                    <p className="app-text-muted px-2 py-4 text-center text-xs">
+                      Отделы не найдены
+                    </p>
                   )}
                 </div>
               </div>
@@ -3357,6 +4666,38 @@ function TasksPageContent() {
                   </h2>
                 </div>
                 <div className="mt-2 flex flex-wrap gap-1.5">
+                  {!viewTask.assignee && !viewTask.completed_at ? (
+                    <button
+                      type="button"
+                      onClick={() => void claimTask(viewTask)}
+                      disabled={claimingTaskId !== null}
+                      className="app-action-primary inline-flex h-7 w-7 shrink-0 items-center justify-center rounded-full disabled:cursor-wait disabled:opacity-60"
+                      title="Взять задачу в работу"
+                      aria-label="Взять задачу в работу"
+                    >
+                      {claimingTaskId === viewTask.id ? (
+                        <Loader2 size={13} className="animate-spin" />
+                      ) : (
+                        <Play size={14} />
+                      )}
+                    </button>
+                  ) : null}
+                  {viewTask.assignee?.id === user?.id && !viewTask.completed_at ? (
+                    <button
+                      type="button"
+                      onClick={() => void completeTask(viewTask)}
+                      disabled={completingTaskId !== null}
+                      className="app-action-success inline-flex h-7 w-7 shrink-0 items-center justify-center rounded-full disabled:cursor-wait disabled:opacity-60"
+                      title="Завершить задачу"
+                      aria-label="Завершить задачу"
+                    >
+                      {completingTaskId === viewTask.id ? (
+                        <Loader2 size={13} className="animate-spin" />
+                      ) : (
+                        <Check size={14} strokeWidth={2.5} />
+                      )}
+                    </button>
+                  ) : null}
                   {viewTaskColumn ? (
                     <div ref={viewColumnMenuRef} className="relative">
                       <button
@@ -3476,6 +4817,117 @@ function TasksPageContent() {
               </div>
             ) : null}
 
+            <div className="rounded-xl border border-[var(--border-subtle)]">
+              <div className="flex items-center px-1 py-1">
+                <button
+                  type="button"
+                  onClick={() => setChecklistOpen((current) => !current)}
+                  className="flex min-w-0 flex-1 items-center gap-2 rounded-lg px-2 py-1.5 text-left"
+                  aria-expanded={checklistOpen}
+                >
+                  <ListChecks size={15} className="app-text-muted shrink-0" />
+                  <span className="truncate text-sm font-medium text-[var(--foreground)]">
+                    Чек-лист
+                  </span>
+                  <span className="app-badge rounded-full px-2 py-0.5 text-[11px]">
+                    {checklistBadgeCompleted}/{checklistBadgeTotal}
+                  </span>
+                </button>
+                <button
+                  type="button"
+                  onClick={() => setChecklistOpen((current) => !current)}
+                  className="app-icon-button flex h-8 w-8 shrink-0 items-center justify-center rounded-lg"
+                  title={checklistOpen ? "Скрыть чек-лист" : "Показать чек-лист"}
+                  aria-label={checklistOpen ? "Скрыть чек-лист" : "Показать чек-лист"}
+                  aria-expanded={checklistOpen}
+                >
+                  <ChevronRight
+                    size={16}
+                    className={`transition-transform ${checklistOpen ? "rotate-90" : ""}`}
+                  />
+                </button>
+              </div>
+
+              {checklistOpen ? (
+                <div className="space-y-3 border-t border-[var(--border-subtle)] p-3">
+                  {taskChecklistLoading && !taskChecklistLoaded ? (
+                    <div className="app-surface-muted rounded-xl border border-[var(--border-subtle)] p-4 text-center">
+                      <Loader2 size={18} className="mx-auto animate-spin text-sky-500" />
+                    </div>
+                  ) : taskChecklist.length > 0 ? (
+                    <div className="overflow-hidden rounded-lg border border-[var(--border-subtle)]">
+                      {taskChecklist.map((item) => (
+                        <div
+                          key={item.id}
+                          className="flex min-w-0 items-center gap-3 border-b border-[var(--border-subtle)] px-3 py-2.5 last:border-b-0"
+                        >
+                          <input
+                            type="checkbox"
+                            checked={item.is_completed}
+                            onChange={() => void toggleViewedTaskChecklistItem(item)}
+                            disabled={taskChecklistSaving}
+                            className="h-4 w-4 shrink-0 accent-sky-500"
+                            aria-label={item.is_completed ? "Вернуть пункт в работу" : "Отметить пункт выполненным"}
+                          />
+                          <span className={`app-text-wrap min-w-0 flex-1 text-sm ${
+                            item.is_completed
+                              ? "app-text-muted line-through"
+                              : "text-[var(--foreground)]"
+                          }`}>
+                            {item.title}
+                          </span>
+                          <button
+                            type="button"
+                            onClick={() => void deleteViewedTaskChecklistItem(item)}
+                            disabled={taskChecklistSaving}
+                            className="app-icon-button flex h-8 w-8 shrink-0 items-center justify-center rounded-lg text-[var(--danger-foreground)] disabled:opacity-50"
+                            title="Удалить пункт"
+                            aria-label={`Удалить пункт ${item.title}`}
+                          >
+                            <Trash2 size={14} />
+                          </button>
+                        </div>
+                      ))}
+                    </div>
+                  ) : (
+                    <div className="app-surface-muted rounded-xl border border-dashed border-[var(--border-subtle)] px-3 py-4 text-center">
+                      <p className="app-text-muted text-xs">Пунктов пока нет</p>
+                    </div>
+                  )}
+
+                  <div className="flex items-center gap-2">
+                    <input
+                      ref={taskChecklistDraftRef}
+                      value={taskChecklistDraft}
+                      onChange={(event) => setTaskChecklistDraft(event.target.value)}
+                      onKeyDown={(event) => {
+                        if (event.key !== "Enter") return;
+                        event.preventDefault();
+                        void addViewedTaskChecklistItem();
+                      }}
+                      disabled={taskChecklistSaving}
+                      className="app-input min-w-0 flex-1 rounded-xl px-3 py-2 text-sm"
+                      placeholder="Новый пункт"
+                    />
+                    <button
+                      type="button"
+                      onClick={() => void addViewedTaskChecklistItem()}
+                      disabled={taskChecklistSaving || !taskChecklistDraft.trim()}
+                      className="app-icon-button flex h-9 w-9 shrink-0 items-center justify-center rounded-lg disabled:opacity-50"
+                      title="Добавить пункт"
+                      aria-label="Добавить пункт чек-листа"
+                    >
+                      {taskChecklistSaving ? (
+                        <Loader2 size={15} className="animate-spin" />
+                      ) : (
+                        <Plus size={15} />
+                      )}
+                    </button>
+                  </div>
+                </div>
+              ) : null}
+            </div>
+
             {viewTask.labels && viewTask.labels.length > 0 ? (
               <div>
                 <div className="mb-2 flex items-center gap-2">
@@ -3496,6 +4948,122 @@ function TasksPageContent() {
               </div>
             ) : null}
 
+            <div className="rounded-xl border border-[var(--border-subtle)]">
+              <div className="flex items-center px-1 py-1">
+                <button
+                  type="button"
+                  onClick={() => setAttachmentsOpen((current) => !current)}
+                  className="flex min-w-0 flex-1 items-center gap-2 rounded-lg px-2 py-1.5 text-left"
+                  aria-expanded={attachmentsOpen}
+                >
+                  <Paperclip size={15} className="app-text-muted shrink-0" />
+                  <span className="truncate text-sm font-medium text-[var(--foreground)]">
+                    Файлы
+                  </span>
+                  <span className="app-badge rounded-full px-2 py-0.5 text-[11px]">
+                    {attachmentsBadgeCount}
+                  </span>
+                </button>
+                <input
+                  ref={taskAttachmentInputRef}
+                  type="file"
+                  multiple
+                  className="sr-only"
+                  disabled={taskAttachmentsUploading}
+                  onChange={(event) => {
+                    const files = Array.from(event.currentTarget.files || []);
+                    event.currentTarget.value = "";
+                    setAttachmentsOpen(true);
+                    void uploadViewedTaskAttachments(files);
+                  }}
+                />
+                <button
+                  type="button"
+                  onClick={() => taskAttachmentInputRef.current?.click()}
+                  disabled={taskAttachmentsUploading}
+                  className="app-icon-button flex h-8 w-8 shrink-0 items-center justify-center rounded-lg disabled:opacity-50"
+                  title="Добавить файлы"
+                  aria-label="Добавить файлы"
+                >
+                  {taskAttachmentsUploading ? (
+                    <Loader2 size={15} className="animate-spin" />
+                  ) : (
+                    <Plus size={15} />
+                  )}
+                </button>
+                <button
+                  type="button"
+                  onClick={() => setAttachmentsOpen((current) => !current)}
+                  className="app-icon-button flex h-8 w-8 shrink-0 items-center justify-center rounded-lg"
+                  title={attachmentsOpen ? "Скрыть файлы" : "Показать файлы"}
+                  aria-label={attachmentsOpen ? "Скрыть файлы" : "Показать файлы"}
+                  aria-expanded={attachmentsOpen}
+                >
+                  <ChevronRight
+                    size={16}
+                    className={`transition-transform ${attachmentsOpen ? "rotate-90" : ""}`}
+                  />
+                </button>
+              </div>
+
+              {attachmentsOpen ? (
+                <div className="space-y-3 border-t border-[var(--border-subtle)] p-3">
+                  {taskAttachmentsLoading ? (
+                    <div className="app-surface-muted rounded-xl border border-[var(--border-subtle)] p-4 text-center">
+                      <Loader2 size={18} className="mx-auto animate-spin text-sky-500" />
+                    </div>
+                  ) : taskAttachments.length > 0 ? (
+                    <div className="overflow-hidden rounded-lg border border-[var(--border-subtle)]">
+                      {taskAttachments.map((attachment) => (
+                        <div
+                          key={attachment.id}
+                          className="flex items-center gap-2 border-b border-[var(--border-subtle)] px-3 py-2.5 last:border-b-0"
+                        >
+                          <button
+                            type="button"
+                            onClick={() => void downloadViewedTaskAttachment(attachment)}
+                            className="flex min-w-0 flex-1 items-center gap-3 text-left"
+                            title={`Скачать ${attachment.file_name}`}
+                          >
+                            <span className="app-selected flex h-8 w-8 shrink-0 items-center justify-center rounded-lg">
+                              <FileText size={15} />
+                            </span>
+                            <span className="min-w-0 flex-1">
+                              <span className="block truncate text-sm font-medium text-[var(--foreground)]">
+                                {attachment.file_name}
+                              </span>
+                              <span className="app-text-muted mt-0.5 block truncate text-[11px]">
+                                {formatFileSize(attachment.file_size)}
+                                {attachment.uploaded_by
+                                  ? ` · ${displayUserName(attachment.uploaded_by)}`
+                                  : ""}
+                                {` · ${formatDateTime(attachment.created_at)}`}
+                              </span>
+                            </span>
+                            <Download size={14} className="app-text-muted shrink-0" />
+                          </button>
+                          <button
+                            type="button"
+                            onClick={() => void deleteViewedTaskAttachment(attachment)}
+                            disabled={taskAttachmentsUploading}
+                            className="app-icon-button flex h-8 w-8 shrink-0 items-center justify-center rounded-lg text-[var(--danger-foreground)] disabled:opacity-50"
+                            title="Удалить файл"
+                            aria-label={`Удалить файл ${attachment.file_name}`}
+                          >
+                            <Trash2 size={14} />
+                          </button>
+                        </div>
+                      ))}
+                    </div>
+                  ) : (
+                    <div className="app-surface-muted rounded-xl border border-dashed border-[var(--border-subtle)] px-3 py-4 text-center">
+                      <p className="app-text-muted text-xs">Файлов пока нет</p>
+                    </div>
+                  )}
+                </div>
+              ) : null}
+            </div>
+
             <div className="rounded-xl border border-[var(--border-subtle)]">
               <button
                 type="button"
@@ -3527,6 +5095,7 @@ function TasksPageContent() {
                   ) : taskComments.length > 0 ? (
                     <div className="space-y-2">
                       {taskComments.map((comment) => {
+                        const canEditComment = comment.author?.id === user?.id;
                         const canDeleteComment = Boolean(
                           user?.auth?.is_staff ||
                           user?.auth?.is_superuser ||
@@ -3544,18 +5113,81 @@ function TasksPageContent() {
                                 </p>
                                 <p className="app-text-muted mt-0.5 text-[11px]">
                                   {formatDateTime(comment.created_at)}
+                                  {comment.is_edited ? " · изменён" : ""}
                                 </p>
                               </div>
-                              {canDeleteComment ? (
-                                <CommentDeleteButton
-                                  disabled={saving}
-                                  onClick={() => deleteViewedTaskComment(comment.id)}
-                                />
+                              {editingCommentId !== comment.id && (canEditComment || canDeleteComment) ? (
+                                <div className="flex shrink-0 items-center gap-1">
+                                  {canEditComment ? (
+                                    <button
+                                      type="button"
+                                      onClick={() => beginEditingViewedTaskComment(comment)}
+                                      disabled={saving}
+                                      className="app-icon-button inline-flex h-7 w-7 items-center justify-center rounded-lg disabled:opacity-50"
+                                      title="Редактировать комментарий"
+                                      aria-label="Редактировать комментарий"
+                                    >
+                                      <Pencil size={13} />
+                                    </button>
+                                  ) : null}
+                                  {canDeleteComment ? (
+                                    <CommentDeleteButton
+                                      disabled={saving}
+                                      onClick={() => deleteViewedTaskComment(comment.id)}
+                                    />
+                                  ) : null}
+                                </div>
                               ) : null}
                             </div>
-                            <p className="app-text-wrap whitespace-pre-wrap text-sm leading-5 text-[var(--foreground)]">
-                              {comment.text}
-                            </p>
+                            {editingCommentId === comment.id ? (
+                              <div className="space-y-2">
+                                <textarea
+                                  autoFocus
+                                  value={editingCommentDraft}
+                                  onChange={(event) => setEditingCommentDraft(event.target.value)}
+                                  onKeyDown={(event) => {
+                                    if ((event.ctrlKey || event.metaKey) && event.key === "Enter") {
+                                      event.preventDefault();
+                                      void updateViewedTaskComment();
+                                    }
+                                    if (event.key === "Escape") {
+                                      event.preventDefault();
+                                      cancelEditingViewedTaskComment();
+                                    }
+                                  }}
+                                  disabled={saving}
+                                  rows={3}
+                                  className="app-input w-full resize-none rounded-lg p-2.5 text-sm"
+                                  aria-label="Текст комментария"
+                                />
+                                <div className="flex justify-end gap-1.5">
+                                  <button
+                                    type="button"
+                                    onClick={cancelEditingViewedTaskComment}
+                                    disabled={saving}
+                                    className="app-icon-button inline-flex h-8 w-8 items-center justify-center rounded-lg disabled:opacity-50"
+                                    title="Отменить редактирование"
+                                    aria-label="Отменить редактирование"
+                                  >
+                                    <X size={14} />
+                                  </button>
+                                  <button
+                                    type="button"
+                                    onClick={() => void updateViewedTaskComment()}
+                                    disabled={saving || !editingCommentDraft.trim()}
+                                    className="app-action-success inline-flex h-8 w-8 items-center justify-center rounded-lg disabled:opacity-50"
+                                    title="Сохранить комментарий"
+                                    aria-label="Сохранить комментарий"
+                                  >
+                                    {saving ? <Loader2 size={14} className="animate-spin" /> : <Check size={14} />}
+                                  </button>
+                                </div>
+                              </div>
+                            ) : (
+                              <p className="app-text-wrap whitespace-pre-wrap text-sm leading-5 text-[var(--foreground)]">
+                                {comment.text}
+                              </p>
+                            )}
                           </div>
                         );
                       })}
@@ -3580,26 +5212,45 @@ function TasksPageContent() {
             </div>
 
             <div className="rounded-xl border border-[var(--border-subtle)]">
-              <button
-                type="button"
-                onClick={() => setLinkedObjectsOpen((current) => !current)}
-                className="flex w-full items-center justify-between gap-3 px-3 py-2.5 text-left"
-                aria-expanded={linkedObjectsOpen}
-              >
-                <span className="flex min-w-0 items-center gap-2">
+              <div className="flex items-center px-1 py-1">
+                <button
+                  type="button"
+                  onClick={() => setLinkedObjectsOpen((current) => !current)}
+                  className="flex min-w-0 flex-1 items-center gap-2 rounded-lg px-2 py-1.5 text-left"
+                  aria-expanded={linkedObjectsOpen}
+                >
                   <Link2 size={15} className="app-text-muted shrink-0" />
-                  <span className="text-sm font-medium text-[var(--foreground)]">
-                    Связанные объекты
+                  <span className="truncate text-sm font-medium text-[var(--foreground)]">
+                    Связанные объекты и ссылки
                   </span>
                   <span className="app-badge rounded-full px-2 py-0.5 text-[11px]">
                     {linkedObjectsBadgeCount}
                   </span>
-                </span>
-                <ChevronRight
-                  size={16}
-                  className={`app-text-muted shrink-0 transition-transform ${linkedObjectsOpen ? "rotate-90" : ""}`}
-                />
-              </button>
+                </button>
+                <button
+                  type="button"
+                  onClick={openLinkedItemModalForView}
+                  disabled={saving}
+                  className="app-icon-button flex h-8 w-8 shrink-0 items-center justify-center rounded-lg disabled:opacity-50"
+                  title="Добавить объект или ссылку"
+                  aria-label="Добавить объект или ссылку"
+                >
+                  <Plus size={15} />
+                </button>
+                <button
+                  type="button"
+                  onClick={() => setLinkedObjectsOpen((current) => !current)}
+                  className="app-icon-button flex h-8 w-8 shrink-0 items-center justify-center rounded-lg"
+                  title={linkedObjectsOpen ? "Скрыть связанные объекты" : "Показать связанные объекты"}
+                  aria-label={linkedObjectsOpen ? "Скрыть связанные объекты" : "Показать связанные объекты"}
+                  aria-expanded={linkedObjectsOpen}
+                >
+                  <ChevronRight
+                    size={16}
+                    className={`transition-transform ${linkedObjectsOpen ? "rotate-90" : ""}`}
+                  />
+                </button>
+              </div>
 
               {linkedObjectsOpen ? (
                 <div className="space-y-2 border-t border-[var(--border-subtle)] p-3">
@@ -3689,10 +5340,18 @@ function TasksPageContent() {
                           disabled={saving}
                         />
                       ))}
+                      {taskExternalLinks.map((link) => (
+                        <TaskExternalLinkCard
+                          key={link.id}
+                          link={link}
+                          onDelete={deleteExternalLinkFromViewedTask}
+                          disabled={saving}
+                        />
+                      ))}
                     </>
                   ) : (
                     <div className="app-surface-muted rounded-xl border border-dashed border-[var(--border-subtle)] px-3 py-4 text-center">
-                      <p className="app-text-muted text-xs">Связанных объектов нет</p>
+                      <p className="app-text-muted text-xs">Связанных объектов и ссылок нет</p>
                     </div>
                   )}
                 </div>
@@ -3786,6 +5445,217 @@ function TasksPageContent() {
         ) : null}
       </Modal>
 
+      <Modal
+        isOpen={linkedItemModalOpen}
+        onClose={closeLinkedItemModal}
+        title="Добавить объект или ссылку"
+        size="md"
+        stackLevel={1}
+        closeOnClickOutside
+        footer={(
+          <div className="flex justify-end gap-2">
+            <button
+              type="button"
+              onClick={closeLinkedItemModal}
+              className="app-action-secondary rounded-xl px-4 py-2 text-sm font-medium"
+              disabled={saving}
+            >
+              Отмена
+            </button>
+            {linkedItemMode === "external_link" ? (
+              <button
+                type="button"
+                onClick={() => {
+                  if (linkedItemTarget === "view") {
+                    void addExternalLinkToViewedTask();
+                  } else {
+                    addExternalLinkToTaskForm();
+                  }
+                }}
+                disabled={saving || !externalLinkUrl.trim()}
+                className="app-action-primary inline-flex items-center gap-2 rounded-xl px-4 py-2 text-sm font-medium disabled:opacity-60"
+              >
+                {saving ? <Loader2 size={15} className="animate-spin" /> : <Plus size={15} />}
+                Добавить
+              </button>
+            ) : null}
+          </div>
+        )}
+      >
+        <div className="space-y-4">
+          <div className="grid grid-cols-3 rounded-xl border border-[var(--border-subtle)] bg-[var(--surface-secondary)] p-1">
+            {([
+              ["document", "Документ", FileText],
+              ["calendar_event", "Событие", CalendarDays],
+              ["external_link", "Ссылка", ExternalLinkIcon],
+            ] as const).map(([mode, label, Icon]) => (
+              <button
+                key={mode}
+                type="button"
+                onClick={() => {
+                  setLinkedItemMode(mode);
+                  setLinkedItemSearch("");
+                }}
+                className={`inline-flex min-w-0 items-center justify-center gap-1.5 rounded-lg px-2 py-2 text-xs font-medium transition ${
+                  linkedItemMode === mode
+                    ? "app-surface text-[var(--foreground)] shadow-sm"
+                    : "app-text-muted hover:text-[var(--foreground)]"
+                }`}
+              >
+                <Icon size={14} className="shrink-0" />
+                <span className="truncate">{label}</span>
+              </button>
+            ))}
+          </div>
+
+          {linkedItemMode === "external_link" ? (
+            <div className="space-y-3">
+              <label className="block">
+                <span className="app-text-muted mb-1 block text-xs font-medium">Ссылка</span>
+                <input
+                  type="url"
+                  value={externalLinkUrl}
+                  onChange={(event) => setExternalLinkUrl(event.target.value)}
+                  className="app-input w-full rounded-xl px-3 py-2 text-sm"
+                  placeholder="https://service.example/item"
+                  autoFocus
+                />
+              </label>
+              <label className="block">
+                <span className="app-text-muted mb-1 block text-xs font-medium">Название</span>
+                <input
+                  value={externalLinkTitle}
+                  onChange={(event) => setExternalLinkTitle(event.target.value)}
+                  className="app-input w-full rounded-xl px-3 py-2 text-sm"
+                  placeholder="Необязательно"
+                />
+              </label>
+            </div>
+          ) : (
+            <>
+              <div className="relative">
+                <Search
+                  size={15}
+                  className="app-text-muted pointer-events-none absolute left-3 top-1/2 -translate-y-1/2"
+                />
+                <input
+                  value={linkedItemSearch}
+                  onChange={(event) => setLinkedItemSearch(event.target.value)}
+                  className="app-input w-full rounded-xl py-2 pl-9 pr-3 text-sm"
+                  placeholder={linkedItemMode === "document" ? "Поиск документов" : "Поиск событий"}
+                  autoFocus
+                />
+              </div>
+
+              <div className="tasks-column-scroll max-h-72 space-y-2 overflow-y-auto pr-1">
+                {linkedItemCandidatesLoading ? (
+                  <div className="app-surface-muted rounded-xl border border-[var(--border-subtle)] p-5 text-center">
+                    <Loader2 size={18} className="mx-auto animate-spin text-sky-500" />
+                  </div>
+                ) : linkedItemMode === "document" ? (
+                  availableDocuments.length > 0 ? (
+                    availableDocuments.map((item) => {
+                      const alreadyLinked = linkedItemTarget === "view"
+                        ? linkedDocuments.some((link) => link.document_id === item.id)
+                        : (
+                          taskFormDocuments.some((link) => link.document_id === item.id) ||
+                          taskFormPendingDocuments.some((document) => document.id === item.id)
+                        );
+                      return (
+                        <button
+                          key={item.id}
+                          type="button"
+                          onClick={() => {
+                            if (linkedItemTarget === "view") {
+                              void linkDocumentToViewedTask(item.id);
+                            } else {
+                              addDocumentToTaskForm(item);
+                            }
+                          }}
+                          disabled={saving || alreadyLinked}
+                          className="app-surface-muted flex w-full items-start gap-3 rounded-xl border border-[var(--border-subtle)] p-3 text-left transition hover:border-[var(--border-strong)] disabled:cursor-default disabled:opacity-60"
+                        >
+                          <span className="app-selected flex h-8 w-8 shrink-0 items-center justify-center rounded-lg">
+                            <FileText size={15} />
+                          </span>
+                          <span className="min-w-0 flex-1">
+                            <span className="block truncate text-sm font-semibold text-[var(--foreground)]">
+                              #{item.id} {item.title}
+                            </span>
+                            <span className="app-text-muted mt-0.5 block truncate text-xs">
+                              {item.folder_path || item.file_name || "Без папки"}
+                            </span>
+                          </span>
+                          {alreadyLinked ? (
+                            <span className="app-badge shrink-0 rounded-full px-2 py-0.5 text-[10px]">
+                              добавлен
+                            </span>
+                          ) : (
+                            <Plus size={15} className="app-text-muted mt-1 shrink-0" />
+                          )}
+                        </button>
+                      );
+                    })
+                  ) : (
+                    <div className="app-surface-muted rounded-xl border border-dashed border-[var(--border-subtle)] p-5 text-center">
+                      <p className="app-text-muted text-xs">Документы не найдены</p>
+                    </div>
+                  )
+                ) : availableEvents.length > 0 ? (
+                  availableEvents.map((item) => {
+                    const alreadyLinked = linkedItemTarget === "view"
+                      ? linkedEvents.some((link) => link.event_id === item.id)
+                      : (
+                        taskFormEvents.some((link) => link.event_id === item.id) ||
+                        taskFormPendingEvents.some((event) => event.id === item.id)
+                      );
+                    return (
+                      <button
+                        key={item.id}
+                        type="button"
+                        onClick={() => {
+                          if (linkedItemTarget === "view") {
+                            void linkEventToViewedTask(item.id);
+                          } else {
+                            addEventToTaskForm(item);
+                          }
+                        }}
+                        disabled={saving || alreadyLinked}
+                        className="app-surface-muted flex w-full items-start gap-3 rounded-xl border border-[var(--border-subtle)] p-3 text-left transition hover:border-[var(--border-strong)] disabled:cursor-default disabled:opacity-60"
+                      >
+                        <span className="app-selected flex h-8 w-8 shrink-0 items-center justify-center rounded-lg">
+                          <CalendarDays size={15} />
+                        </span>
+                        <span className="min-w-0 flex-1">
+                          <span className="block truncate text-sm font-semibold text-[var(--foreground)]">
+                            #{item.id} {item.title}
+                          </span>
+                          <span className="app-text-muted mt-0.5 block truncate text-xs">
+                            {formatDateTime(item.start)}
+                            {item.calendar_name ? ` · ${item.calendar_name}` : ""}
+                          </span>
+                        </span>
+                        {alreadyLinked ? (
+                          <span className="app-badge shrink-0 rounded-full px-2 py-0.5 text-[10px]">
+                            добавлено
+                          </span>
+                        ) : (
+                          <Plus size={15} className="app-text-muted mt-1 shrink-0" />
+                        )}
+                      </button>
+                    );
+                  })
+                ) : (
+                  <div className="app-surface-muted rounded-xl border border-dashed border-[var(--border-subtle)] p-5 text-center">
+                    <p className="app-text-muted text-xs">События не найдены</p>
+                  </div>
+                )}
+              </div>
+            </>
+          )}
+        </div>
+      </Modal>
+
       <Modal
         isOpen={taskModalOpen}
         onClose={closeTaskModal}
@@ -3805,7 +5675,7 @@ function TasksPageContent() {
             <button
               type="button"
               onClick={() => void saveTask()}
-              disabled={saving || !form.title.trim() || !form.column}
+              disabled={saving || !form.title.trim() || !form.column || taskFormChecklistHasInvalidTitle}
               className="app-action-primary inline-flex items-center gap-2 rounded-xl px-4 py-2 text-sm font-medium disabled:opacity-60"
             >
               {saving ? <Loader2 size={16} className="animate-spin" /> : null}
@@ -3845,6 +5715,106 @@ function TasksPageContent() {
             />
           </label>
 
+          <div className="rounded-xl border border-[var(--border-subtle)]">
+            <div className="flex items-center px-1 py-1">
+              <button
+                type="button"
+                onClick={() => setTaskFormChecklistOpen((current) => !current)}
+                className="flex min-w-0 flex-1 items-center gap-2 rounded-lg px-2 py-1.5 text-left"
+                aria-expanded={taskFormChecklistOpen}
+              >
+                <ListChecks size={15} className="app-text-muted shrink-0" />
+                <span className="truncate text-sm font-medium text-[var(--foreground)]">
+                  Чек-лист
+                </span>
+                <span className="app-badge rounded-full px-2 py-0.5 text-[11px]">
+                  {taskFormChecklistCompleted}/{taskFormChecklistTotal}
+                </span>
+              </button>
+              <button
+                type="button"
+                onClick={() => setTaskFormChecklistOpen((current) => !current)}
+                className="app-icon-button flex h-8 w-8 shrink-0 items-center justify-center rounded-lg"
+                title={taskFormChecklistOpen ? "Скрыть чек-лист" : "Показать чек-лист"}
+                aria-label={taskFormChecklistOpen ? "Скрыть чек-лист" : "Показать чек-лист"}
+                aria-expanded={taskFormChecklistOpen}
+              >
+                <ChevronRight
+                  size={16}
+                  className={`transition-transform ${taskFormChecklistOpen ? "rotate-90" : ""}`}
+                />
+              </button>
+            </div>
+
+            {taskFormChecklistOpen ? (
+              <div className="space-y-3 border-t border-[var(--border-subtle)] p-3">
+                {taskFormResourcesLoading ? (
+                  <div className="app-surface-muted rounded-xl border border-[var(--border-subtle)] p-4 text-center">
+                    <Loader2 size={18} className="mx-auto animate-spin text-sky-500" />
+                  </div>
+                ) : taskFormChecklistTotal > 0 ? (
+                  <div className="overflow-hidden rounded-lg border border-[var(--border-subtle)]">
+                    {taskFormChecklistItems.map((item) => (
+                      <TaskChecklistFormRow
+                        key={`checklist-${item.id}`}
+                        title={item.title}
+                        isCompleted={item.is_completed}
+                        disabled={saving}
+                        onTitleChange={(title) => updateExistingTaskFormChecklistItem(item.id, { title })}
+                        onCompletedChange={(is_completed) => updateExistingTaskFormChecklistItem(item.id, { is_completed })}
+                        onRemove={() => removeExistingTaskFormChecklistItem(item)}
+                      />
+                    ))}
+                    {taskFormPendingChecklistItems.map((item) => (
+                      <TaskChecklistFormRow
+                        key={item.key}
+                        title={item.title}
+                        isCompleted={item.is_completed}
+                        pending
+                        disabled={saving}
+                        onTitleChange={(title) => updatePendingTaskFormChecklistItem(item.key, { title })}
+                        onCompletedChange={(is_completed) => updatePendingTaskFormChecklistItem(item.key, { is_completed })}
+                        onRemove={() => setTaskFormPendingChecklistItems((current) => (
+                          current.filter((currentItem) => currentItem.key !== item.key)
+                        ))}
+                      />
+                    ))}
+                  </div>
+                ) : (
+                  <div className="app-surface-muted rounded-xl border border-dashed border-[var(--border-subtle)] px-3 py-4 text-center">
+                    <p className="app-text-muted text-xs">Пунктов пока нет</p>
+                  </div>
+                )}
+
+                <div className="flex items-center gap-2">
+                  <input
+                    ref={taskFormChecklistDraftRef}
+                    value={taskFormChecklistDraft}
+                    onChange={(event) => setTaskFormChecklistDraft(event.target.value)}
+                    onKeyDown={(event) => {
+                      if (event.key !== "Enter") return;
+                      event.preventDefault();
+                      addTaskFormChecklistItem();
+                    }}
+                    disabled={saving}
+                    className="app-input min-w-0 flex-1 rounded-xl px-3 py-2 text-sm"
+                    placeholder="Новый пункт"
+                  />
+                  <button
+                    type="button"
+                    onClick={addTaskFormChecklistItem}
+                    disabled={saving || !taskFormChecklistDraft.trim()}
+                    className="app-icon-button flex h-9 w-9 shrink-0 items-center justify-center rounded-lg disabled:opacity-50"
+                    title="Добавить пункт"
+                    aria-label="Добавить пункт чек-листа"
+                  >
+                    <Plus size={15} />
+                  </button>
+                </div>
+              </div>
+            ) : null}
+          </div>
+
           <div className="grid gap-3 md:grid-cols-2">
             <label className="block">
               <span className="app-text-muted mb-1 block text-xs font-medium">Колонка</span>
@@ -3946,6 +5916,220 @@ function TasksPageContent() {
               </button>
             </div>
           </div>
+
+          <div className="rounded-xl border border-[var(--border-subtle)]">
+            <div className="flex items-center px-1 py-1">
+              <button
+                type="button"
+                onClick={() => setTaskFormFilesOpen((current) => !current)}
+                className="flex min-w-0 flex-1 items-center gap-2 rounded-lg px-2 py-1.5 text-left"
+                aria-expanded={taskFormFilesOpen}
+              >
+                <Paperclip size={15} className="app-text-muted shrink-0" />
+                <span className="truncate text-sm font-medium text-[var(--foreground)]">
+                  Файлы
+                </span>
+                <span className="app-badge rounded-full px-2 py-0.5 text-[11px]">
+                  {taskFormAttachmentsCount}
+                </span>
+              </button>
+              <input
+                ref={taskFormAttachmentInputRef}
+                type="file"
+                multiple
+                className="sr-only"
+                disabled={saving}
+                onChange={(event) => {
+                  const files = Array.from(event.currentTarget.files || []);
+                  event.currentTarget.value = "";
+                  addFilesToTaskForm(files);
+                }}
+              />
+              <button
+                type="button"
+                onClick={() => taskFormAttachmentInputRef.current?.click()}
+                disabled={saving}
+                className="app-icon-button flex h-8 w-8 shrink-0 items-center justify-center rounded-lg disabled:opacity-50"
+                title="Добавить файлы"
+                aria-label="Добавить файлы"
+              >
+                <Plus size={15} />
+              </button>
+              <button
+                type="button"
+                onClick={() => setTaskFormFilesOpen((current) => !current)}
+                className="app-icon-button flex h-8 w-8 shrink-0 items-center justify-center rounded-lg"
+                title={taskFormFilesOpen ? "Скрыть файлы" : "Показать файлы"}
+                aria-label={taskFormFilesOpen ? "Скрыть файлы" : "Показать файлы"}
+                aria-expanded={taskFormFilesOpen}
+              >
+                <ChevronRight
+                  size={16}
+                  className={`transition-transform ${taskFormFilesOpen ? "rotate-90" : ""}`}
+                />
+              </button>
+            </div>
+
+            {taskFormFilesOpen ? (
+              <div className="border-t border-[var(--border-subtle)] p-3">
+                {taskFormResourcesLoading ? (
+                  <div className="app-surface-muted rounded-xl border border-[var(--border-subtle)] p-4 text-center">
+                    <Loader2 size={18} className="mx-auto animate-spin text-sky-500" />
+                  </div>
+                ) : taskFormAttachmentsCount > 0 ? (
+                  <div className="overflow-hidden rounded-lg border border-[var(--border-subtle)]">
+                    {taskFormAttachments.map((attachment) => (
+                      <TaskFormResourceRow
+                        key={`attachment-${attachment.id}`}
+                        icon={FileText}
+                        title={attachment.file_name}
+                        meta={formatFileSize(attachment.file_size)}
+                        onRemove={() => removeExistingTaskFormAttachment(attachment)}
+                      />
+                    ))}
+                    {taskFormPendingFiles.map((file) => (
+                      <TaskFormResourceRow
+                        key={`pending-file-${file.name}-${file.size}-${file.lastModified}`}
+                        icon={FileText}
+                        title={file.name}
+                        meta={formatFileSize(file.size)}
+                        pending
+                        onRemove={() => setTaskFormPendingFiles((current) => (
+                          current.filter((item) => item !== file)
+                        ))}
+                      />
+                    ))}
+                  </div>
+                ) : (
+                  <div className="app-surface-muted rounded-xl border border-dashed border-[var(--border-subtle)] p-4 text-center">
+                    <p className="app-text-muted text-xs">Файлов пока нет</p>
+                  </div>
+                )}
+              </div>
+            ) : null}
+          </div>
+
+          <div className="rounded-xl border border-[var(--border-subtle)]">
+            <div className="flex items-center px-1 py-1">
+              <button
+                type="button"
+                onClick={() => setTaskFormLinksOpen((current) => !current)}
+                className="flex min-w-0 flex-1 items-center gap-2 rounded-lg px-2 py-1.5 text-left"
+                aria-expanded={taskFormLinksOpen}
+              >
+                <Link2 size={15} className="app-text-muted shrink-0" />
+                <span className="truncate text-sm font-medium text-[var(--foreground)]">
+                  Связанные объекты и ссылки
+                </span>
+                <span className="app-badge rounded-full px-2 py-0.5 text-[11px]">
+                  {taskFormLinksCount}
+                </span>
+              </button>
+              <button
+                type="button"
+                onClick={openLinkedItemModalForForm}
+                disabled={saving}
+                className="app-icon-button flex h-8 w-8 shrink-0 items-center justify-center rounded-lg disabled:opacity-50"
+                title="Добавить объект или ссылку"
+                aria-label="Добавить объект или ссылку"
+              >
+                <Plus size={15} />
+              </button>
+              <button
+                type="button"
+                onClick={() => setTaskFormLinksOpen((current) => !current)}
+                className="app-icon-button flex h-8 w-8 shrink-0 items-center justify-center rounded-lg"
+                title={taskFormLinksOpen ? "Скрыть связи" : "Показать связи"}
+                aria-label={taskFormLinksOpen ? "Скрыть связи" : "Показать связи"}
+                aria-expanded={taskFormLinksOpen}
+              >
+                <ChevronRight
+                  size={16}
+                  className={`transition-transform ${taskFormLinksOpen ? "rotate-90" : ""}`}
+                />
+              </button>
+            </div>
+
+            {taskFormLinksOpen ? (
+              <div className="border-t border-[var(--border-subtle)] p-3">
+                {taskFormResourcesLoading ? (
+                  <div className="app-surface-muted rounded-xl border border-[var(--border-subtle)] p-4 text-center">
+                    <Loader2 size={18} className="mx-auto animate-spin text-sky-500" />
+                  </div>
+                ) : taskFormLinksCount > 0 ? (
+                  <div className="overflow-hidden rounded-lg border border-[var(--border-subtle)]">
+                    {taskFormDocuments.map((link) => (
+                      <TaskFormResourceRow
+                        key={`document-${link.id}`}
+                        icon={FileText}
+                        title={`#${link.document_id} ${link.document?.title || "Документ"}`}
+                        meta="Документ"
+                        onRemove={() => removeExistingTaskFormDocument(link)}
+                      />
+                    ))}
+                    {taskFormPendingDocuments.map((document) => (
+                      <TaskFormResourceRow
+                        key={`pending-document-${document.id}`}
+                        icon={FileText}
+                        title={`#${document.id} ${document.title}`}
+                        meta="Документ"
+                        pending
+                        onRemove={() => setTaskFormPendingDocuments((current) => (
+                          current.filter((item) => item.id !== document.id)
+                        ))}
+                      />
+                    ))}
+                    {taskFormEvents.map((link) => (
+                      <TaskFormResourceRow
+                        key={`event-${link.id}`}
+                        icon={CalendarDays}
+                        title={`#${link.event_id} ${link.event?.title || "Событие"}`}
+                        meta={link.event?.start ? formatDateTime(link.event.start) : "Событие календаря"}
+                        onRemove={() => removeExistingTaskFormEvent(link)}
+                      />
+                    ))}
+                    {taskFormPendingEvents.map((event) => (
+                      <TaskFormResourceRow
+                        key={`pending-event-${event.id}`}
+                        icon={CalendarDays}
+                        title={`#${event.id} ${event.title}`}
+                        meta={formatDateTime(event.start)}
+                        pending
+                        onRemove={() => setTaskFormPendingEvents((current) => (
+                          current.filter((item) => item.id !== event.id)
+                        ))}
+                      />
+                    ))}
+                    {taskFormExternalLinks.map((link) => (
+                      <TaskFormResourceRow
+                        key={`external-link-${link.id}`}
+                        icon={ExternalLinkIcon}
+                        title={link.title || getExternalLinkHost(link.url)}
+                        meta={link.url}
+                        onRemove={() => removeExistingTaskFormExternalLink(link)}
+                      />
+                    ))}
+                    {taskFormPendingExternalLinks.map((link) => (
+                      <TaskFormResourceRow
+                        key={`pending-external-link-${link.key}`}
+                        icon={ExternalLinkIcon}
+                        title={link.title || getExternalLinkHost(link.url)}
+                        meta={link.url}
+                        pending
+                        onRemove={() => setTaskFormPendingExternalLinks((current) => (
+                          current.filter((item) => item.key !== link.key)
+                        ))}
+                      />
+                    ))}
+                  </div>
+                ) : (
+                  <div className="app-surface-muted rounded-xl border border-dashed border-[var(--border-subtle)] p-4 text-center">
+                    <p className="app-text-muted text-xs">Связанных объектов и ссылок пока нет</p>
+                  </div>
+                )}
+              </div>
+            ) : null}
+          </div>
         </div>
       </Modal>
     </AppShell>
diff --git a/frontend/src/components/AppShell.tsx b/frontend/src/components/AppShell.tsx
index 3a658384..73505015 100644
--- a/frontend/src/components/AppShell.tsx
+++ b/frontend/src/components/AppShell.tsx
@@ -16,6 +16,7 @@ import { MobileLeftDrawer, MobileCalendarDrawer } from "@/components/layout/Mobi
 import { usePwa } from "@/contexts/PwaContext";
 import { Modal } from "@/components/ui";
 import { apiClient } from "@/lib/api";
+import { NAV_NOTIFICATION_CATEGORIES } from "@/lib/navigation-notifications";
 import type { GuestVisit, GuestVisitComment } from "@/types/api";
 
 type AppShellProps = {
@@ -50,17 +51,17 @@ type PaginatedResponse<T> = {
 };
 
 const navItems = [
-  { href: "/", label: "Лента", icon: HomeIcon, category: "Новости" },
-  { href: "/messages", label: "Сообщения", icon: MessageSquare, category: "Сообщения" },
+  { href: "/", label: "Лента", icon: HomeIcon, category: NAV_NOTIFICATION_CATEGORIES.feed },
+  { href: "/messages", label: "Сообщения", icon: MessageSquare, category: NAV_NOTIFICATION_CATEGORIES.messages },
   { href: "/employees", label: "Сотрудники", icon: Users },
   { href: "/departments", label: "Отделы", icon: Building2 },
   { href: "/attendance", label: "Посещаемость", icon: CalendarCheck },
-  { href: "/requests", label: "Заявления", icon: FileSignature, category: "Заявки" },
-  { href: "/guests", label: "Гости", icon: UserRoundPlus, category: "Гости" },
+  { href: "/requests", label: "Заявления", icon: FileSignature, category: NAV_NOTIFICATION_CATEGORIES.requests },
+  { href: "/guests", label: "Гости", icon: UserRoundPlus, category: NAV_NOTIFICATION_CATEGORIES.guests },
   // { href: "/equipment", label: "Оборудование", icon: Monitor },
-  { href: "/procurement", label: "Закупки", icon: ShoppingCart, category: "Закупки", autoReadOnNavigate: false },
-  { href: "/tasks", label: "Доска", icon: Kanban, category: "Доска" },
-  { href: "/documents", label: "Документы", icon: FileText, category: "Документы" },
+  { href: "/procurement", label: "Закупки", icon: ShoppingCart, category: NAV_NOTIFICATION_CATEGORIES.procurement, autoReadOnNavigate: false },
+  { href: "/tasks", label: "Доска", icon: Kanban, category: NAV_NOTIFICATION_CATEGORIES.tasks },
+  { href: "/documents", label: "Документы", icon: FileText, category: NAV_NOTIFICATION_CATEGORIES.documents },
   // { href: "/finances", label: "Финансы", icon: Wallet },
 ];
 
diff --git a/frontend/src/components/documents/DocumentAcknowledgement.tsx b/frontend/src/components/documents/DocumentAcknowledgement.tsx
index 4c7d1209..8ccc71c4 100644
--- a/frontend/src/components/documents/DocumentAcknowledgement.tsx
+++ b/frontend/src/components/documents/DocumentAcknowledgement.tsx
@@ -36,11 +36,18 @@ export function DocumentAcknowledgement({
 
   const acknowledgements = document.acknowledgements || [];
   const isAcknowledged = document.is_acknowledged || false;
+  const acknowledgementRequiredForUser =
+    document.acknowledgement_required_for_user ?? document.acknowledgement_required;
 
   return (
     <div className="space-y-3">
       {/* Acknowledge Button/Status */}
-      {!isAcknowledged ? (
+      {!acknowledgementRequiredForUser ? (
+        <div className="app-surface-muted flex items-center gap-2 rounded-lg px-3 py-2 text-sm">
+          <CheckCircle size={16} className="app-text-muted shrink-0" />
+          <span>Для вас подтверждение ознакомления не требуется</span>
+        </div>
+      ) : !isAcknowledged ? (
         <div className="app-feedback-warning rounded-xl p-4">
           <div className="mb-3 flex items-start gap-3">
             <CheckCircle size={20} className="mt-0.5 shrink-0" />
@@ -59,7 +66,7 @@ export function DocumentAcknowledgement({
             disabled={isSubmitting}
             className="app-action-primary w-full rounded-lg px-4 py-2 text-sm font-medium disabled:cursor-not-allowed disabled:opacity-50"
           >
-            {isSubmitting ? "Подтверждение..." : "Подтвердить прочтение"}
+            {isSubmitting ? "Подтверждение..." : "Ознакомился(лась)"}
           </button>
         </div>
       ) : (
diff --git a/frontend/src/components/documents/DocumentAudienceSelector.tsx b/frontend/src/components/documents/DocumentAudienceSelector.tsx
new file mode 100644
index 00000000..275d48e8
--- /dev/null
+++ b/frontend/src/components/documents/DocumentAudienceSelector.tsx
@@ -0,0 +1,243 @@
+"use client";
+
+import { useMemo, useState } from "react";
+import { Search } from "lucide-react";
+
+import { RequestAvatar } from "@/components/requests/RequestAvatar";
+import type { Department, User } from "@/types/api";
+
+export type DocumentAudienceMode = "all" | "none" | "restricted";
+
+type DocumentAudienceSelectorProps = {
+  kind: "access" | "acknowledgement";
+  mode: DocumentAudienceMode;
+  onModeChange: (mode: DocumentAudienceMode) => void;
+  employees: User[];
+  departments: Department[];
+  selectedEmployeeIds: number[];
+  selectedDepartmentIds: number[];
+  onSelectedEmployeeIdsChange: (ids: number[]) => void;
+  onSelectedDepartmentIdsChange: (ids: number[]) => void;
+  loading?: boolean;
+  disabled?: boolean;
+};
+
+function employeeName(employee: User) {
+  return [employee.last_name, employee.first_name, employee.patronymic]
+    .filter(Boolean)
+    .join(" ")
+    .trim() || employee.email || `Сотрудник #${employee.id}`;
+}
+
+function employeeInitials(employee: User) {
+  return `${employee.last_name?.[0] || ""}${employee.first_name?.[0] || ""}`.toUpperCase() || "С";
+}
+
+function normalizeSearch(value: string) {
+  return value.trim().toLocaleLowerCase("ru");
+}
+
+export function DocumentAudienceSelector({
+  kind,
+  mode,
+  onModeChange,
+  employees,
+  departments,
+  selectedEmployeeIds,
+  selectedDepartmentIds,
+  onSelectedEmployeeIdsChange,
+  onSelectedDepartmentIdsChange,
+  loading = false,
+  disabled = false,
+}: DocumentAudienceSelectorProps) {
+  const [employeeSearch, setEmployeeSearch] = useState("");
+  const [departmentSearch, setDepartmentSearch] = useState("");
+  const isAcknowledgement = kind === "acknowledgement";
+
+  const options: Array<{ value: DocumentAudienceMode; label: string }> = isAcknowledgement
+    ? [
+        { value: "all", label: "Для всех с доступом" },
+        { value: "none", label: "Не требуется" },
+        { value: "restricted", label: "Выборочно" },
+      ]
+    : [
+        { value: "all", label: "Для всех" },
+        { value: "restricted", label: "Выборочно" },
+      ];
+
+  const filteredEmployees = useMemo(() => {
+    const query = normalizeSearch(employeeSearch);
+    if (!query) return employees;
+    return employees.filter((employee) => (
+      `${employeeName(employee)} ${employee.email || ""}`.toLocaleLowerCase("ru").includes(query)
+    ));
+  }, [employeeSearch, employees]);
+
+  const filteredDepartments = useMemo(() => {
+    const query = normalizeSearch(departmentSearch);
+    if (!query) return departments;
+    return departments.filter((department) => department.name.toLocaleLowerCase("ru").includes(query));
+  }, [departmentSearch, departments]);
+
+  const toggleEmployee = (employeeId: number) => {
+    onSelectedEmployeeIdsChange(
+      selectedEmployeeIds.includes(employeeId)
+        ? selectedEmployeeIds.filter((id) => id !== employeeId)
+        : [...selectedEmployeeIds, employeeId],
+    );
+  };
+
+  const toggleDepartment = (departmentId: number) => {
+    onSelectedDepartmentIdsChange(
+      selectedDepartmentIds.includes(departmentId)
+        ? selectedDepartmentIds.filter((id) => id !== departmentId)
+        : [...selectedDepartmentIds, departmentId],
+    );
+  };
+
+  return (
+    <section className="space-y-3">
+      <div>
+        <h3 className="text-sm font-semibold text-[var(--foreground)]">
+          {isAcknowledgement ? "Требование ознакомления" : "Доступ к документу"}
+        </h3>
+        <p className="app-text-muted mt-1 text-xs">
+          {isAcknowledgement
+            ? "Выберите сотрудников, которые должны подтвердить ознакомление."
+            : "Выберите сотрудников, которые смогут открыть документ."}
+        </p>
+      </div>
+
+      <div className={`grid gap-2 ${options.length === 3 ? "sm:grid-cols-3" : "sm:grid-cols-2"}`}>
+        {options.map((option) => (
+          <button
+            key={option.value}
+            type="button"
+            onClick={() => onModeChange(option.value)}
+            disabled={disabled}
+            aria-pressed={mode === option.value}
+            className={`rounded-xl border px-3 py-2 text-left text-sm font-medium transition disabled:opacity-50 ${
+              mode === option.value
+                ? "app-selected border-[var(--accent-primary)]"
+                : "border-[var(--border-subtle)] text-[var(--muted-foreground)] hover:border-[var(--border-strong)]"
+            }`}
+          >
+            {option.label}
+          </button>
+        ))}
+      </div>
+
+      {mode === "restricted" ? (
+        <div className="grid gap-3 md:grid-cols-2">
+          <div>
+            <div className="mb-2 flex items-center justify-between gap-2">
+              <span className="app-text-muted text-xs font-medium">Сотрудники</span>
+              <span className="app-badge rounded-full px-2 py-0.5 text-[11px]">
+                {selectedEmployeeIds.length}
+              </span>
+            </div>
+            <div className="relative mb-2">
+              <Search
+                size={14}
+                className="app-text-muted pointer-events-none absolute left-2.5 top-1/2 -translate-y-1/2"
+              />
+              <input
+                value={employeeSearch}
+                onChange={(event) => setEmployeeSearch(event.target.value)}
+                disabled={disabled}
+                className="app-input w-full rounded-xl py-2 pl-8 pr-3 text-xs"
+                placeholder="Поиск сотрудников"
+                aria-label={`${isAcknowledgement ? "Ознакомление" : "Доступ"}: поиск сотрудников`}
+              />
+            </div>
+            <div className="tasks-column-scroll app-surface-muted max-h-52 space-y-1 overflow-y-auto rounded-xl border border-[var(--border-subtle)] p-2">
+              {loading ? (
+                <p className="app-text-muted px-2 py-4 text-center text-xs">Загрузка сотрудников...</p>
+              ) : filteredEmployees.length > 0 ? (
+                filteredEmployees.map((employee) => {
+                  const name = employeeName(employee);
+                  return (
+                    <label
+                      key={employee.id}
+                      className="flex cursor-pointer items-center gap-2 rounded-lg px-2 py-1.5 text-sm transition hover:bg-[var(--surface-elevated)]"
+                    >
+                      <input
+                        type="checkbox"
+                        checked={selectedEmployeeIds.includes(employee.id)}
+                        onChange={() => toggleEmployee(employee.id)}
+                        disabled={disabled}
+                        className="h-4 w-4 shrink-0"
+                      />
+                      <RequestAvatar
+                        alt={name}
+                        fallback={employeeInitials(employee)}
+                        src={employee.avatar}
+                        size="sm"
+                      />
+                      <span className="min-w-0 flex-1">
+                        <span className="block truncate text-xs font-medium text-[var(--foreground)]">{name}</span>
+                        {employee.email ? (
+                          <span className="app-text-muted block truncate text-[10px]">{employee.email}</span>
+                        ) : null}
+                      </span>
+                    </label>
+                  );
+                })
+              ) : (
+                <p className="app-text-muted px-2 py-4 text-center text-xs">Сотрудники не найдены</p>
+              )}
+            </div>
+          </div>
+
+          <div>
+            <div className="mb-2 flex items-center justify-between gap-2">
+              <span className="app-text-muted text-xs font-medium">Отделы</span>
+              <span className="app-badge rounded-full px-2 py-0.5 text-[11px]">
+                {selectedDepartmentIds.length}
+              </span>
+            </div>
+            <div className="relative mb-2">
+              <Search
+                size={14}
+                className="app-text-muted pointer-events-none absolute left-2.5 top-1/2 -translate-y-1/2"
+              />
+              <input
+                value={departmentSearch}
+                onChange={(event) => setDepartmentSearch(event.target.value)}
+                disabled={disabled}
+                className="app-input w-full rounded-xl py-2 pl-8 pr-3 text-xs"
+                placeholder="Поиск отделов"
+                aria-label={`${isAcknowledgement ? "Ознакомление" : "Доступ"}: поиск отделов`}
+              />
+            </div>
+            <div className="tasks-column-scroll app-surface-muted max-h-52 space-y-1 overflow-y-auto rounded-xl border border-[var(--border-subtle)] p-2">
+              {loading ? (
+                <p className="app-text-muted px-2 py-4 text-center text-xs">Загрузка отделов...</p>
+              ) : filteredDepartments.length > 0 ? (
+                filteredDepartments.map((department) => (
+                  <label
+                    key={department.id}
+                    className="flex cursor-pointer items-center gap-2 rounded-lg px-2 py-1.5 text-sm transition hover:bg-[var(--surface-elevated)]"
+                  >
+                    <input
+                      type="checkbox"
+                      checked={selectedDepartmentIds.includes(department.id)}
+                      onChange={() => toggleDepartment(department.id)}
+                      disabled={disabled}
+                      className="h-4 w-4 shrink-0"
+                    />
+                    <span className="min-w-0 truncate text-xs font-medium text-[var(--foreground)]">
+                      {department.name}
+                    </span>
+                  </label>
+                ))
+              ) : (
+                <p className="app-text-muted px-2 py-4 text-center text-xs">Отделы не найдены</p>
+              )}
+            </div>
+          </div>
+        </div>
+      ) : null}
+    </section>
+  );
+}
diff --git a/frontend/src/components/documents/DocumentComments.tsx b/frontend/src/components/documents/DocumentComments.tsx
index 6ab0e282..8be39c22 100644
--- a/frontend/src/components/documents/DocumentComments.tsx
+++ b/frontend/src/components/documents/DocumentComments.tsx
@@ -1,6 +1,6 @@
 "use client";
 
-import { useState, useEffect } from "react";
+import { useCallback, useEffect, useState } from "react";
 import { MessageCircle, Edit2, CornerDownRight } from "lucide-react";
 import { apiClient } from "@/lib/api";
 import { toast } from "sonner";
@@ -24,9 +24,10 @@ interface Comment {
 
 interface DocumentCommentsProps {
   documentId: number;
+  onCommentsChanged?: () => void;
 }
 
-export function DocumentComments({ documentId }: DocumentCommentsProps) {
+export function DocumentComments({ documentId, onCommentsChanged }: DocumentCommentsProps) {
   const { user } = useUser();
   const [comments, setComments] = useState<Comment[]>([]);
   const [loading, setLoading] = useState(true);
@@ -36,11 +37,7 @@ export function DocumentComments({ documentId }: DocumentCommentsProps) {
   const [editText, setEditText] = useState("");
   const [submitting, setSubmitting] = useState(false);
 
-  useEffect(() => {
-    loadComments();
-  }, [documentId]);
-
-  const loadComments = async () => {
+  const loadComments = useCallback(async () => {
     try {
       setLoading(true);
       const response = await apiClient.getDocumentComments(documentId);
@@ -75,7 +72,11 @@ export function DocumentComments({ documentId }: DocumentCommentsProps) {
     } finally {
       setLoading(false);
     }
-  };
+  }, [documentId]);
+
+  useEffect(() => {
+    void loadComments();
+  }, [loadComments]);
 
   const handleSubmitComment = async () => {
     if (!newComment.trim()) return;
@@ -92,6 +93,7 @@ export function DocumentComments({ documentId }: DocumentCommentsProps) {
       setNewComment("");
       setReplyTo(null);
       await loadComments();
+      onCommentsChanged?.();
     } catch (error) {
       console.error("Ошибка добавления комментария:", error);
       toast.error("Не удалось добавить комментарий");
@@ -105,7 +107,7 @@ export function DocumentComments({ documentId }: DocumentCommentsProps) {
 
     setSubmitting(true);
     try {
-      await apiClient.updateDocumentComment(id, editText);
+      await apiClient.updateDocumentComment(documentId, id, editText);
       toast.success("Комментарий обновлен");
       setEditingId(null);
       setEditText("");
@@ -122,9 +124,10 @@ export function DocumentComments({ documentId }: DocumentCommentsProps) {
     if (!window.confirm("Удалить комментарий?")) return;
 
     try {
-      await apiClient.deleteDocumentComment(id);
+      await apiClient.deleteDocumentComment(documentId, id);
       toast.success("Комментарий удален");
       await loadComments();
+      onCommentsChanged?.();
     } catch (error) {
       console.error("Ошибка удаления комментария:", error);
       toast.error("Не удалось удалить комментарий");
diff --git a/frontend/src/components/documents/DocumentDetailModal.tsx b/frontend/src/components/documents/DocumentDetailModal.tsx
index f5acd67e..b1322375 100644
--- a/frontend/src/components/documents/DocumentDetailModal.tsx
+++ b/frontend/src/components/documents/DocumentDetailModal.tsx
@@ -47,6 +47,7 @@ const DocumentPreviewPane = dynamic(
 interface DocumentDetailModalProps {
   document: Document | null;
   isOpen: boolean;
+  initialTab?: TabType;
   onClose: () => void;
   onUpdate?: () => void;
   onEditMetadata?: () => void;
@@ -59,6 +60,7 @@ type TabType = "preview" | "info" | "activity" | "acknowledgements" | "comments"
 export function DocumentDetailModal({
   document,
   isOpen,
+  initialTab,
   onClose,
   onUpdate,
   onEditMetadata,
@@ -103,7 +105,11 @@ export function DocumentDetailModal({
     { id: "comments" as TabType, label: "Комментарии", icon: MessageSquare },
     { id: "related" as TabType, label: "Связанные", icon: Link2 },
   ];
-  const defaultTab: TabType = documentHasFile ? "preview" : "info";
+  const defaultTab: TabType = initialTab && tabs.some((tab) => tab.id === initialTab)
+    ? initialTab
+    : documentHasFile
+      ? "preview"
+      : "info";
   const activeTab: TabType = activeTabState.documentId === documentId
     ? activeTabState.value
     : defaultTab;
@@ -522,7 +528,10 @@ export function DocumentDetailModal({
                   {currentActiveTab === "comments" && (
                     <div className="p-6">
                       <div className="app-surface rounded-xl p-6">
-                        <DocumentComments documentId={document.id} />
+                        <DocumentComments
+                          documentId={document.id}
+                          onCommentsChanged={() => onUpdate?.()}
+                        />
                       </div>
                     </div>
                   )}
@@ -790,7 +799,10 @@ export function DocumentDetailModal({
             {currentActiveTab === "comments" && (
               <div className="p-4 sm:p-6">
                 <div className="app-surface rounded-xl p-4 sm:p-6">
-                  <DocumentComments documentId={document.id} />
+                  <DocumentComments
+                    documentId={document.id}
+                    onCommentsChanged={() => onUpdate?.()}
+                  />
                 </div>
               </div>
             )}
diff --git a/frontend/src/components/documents/DocumentMetadataEditor.tsx b/frontend/src/components/documents/DocumentMetadataEditor.tsx
index 6570202e..fa232dfe 100644
--- a/frontend/src/components/documents/DocumentMetadataEditor.tsx
+++ b/frontend/src/components/documents/DocumentMetadataEditor.tsx
@@ -6,19 +6,20 @@ import { apiClient } from '@/lib/api';
 import { toast } from 'sonner';
 import {
   AlertCircle,
-  Building2,
-  CheckCircle,
   FileText,
   Folder,
   Loader2,
   ScrollText,
   Tag as TagIcon,
   Upload,
-  Users,
   X,
 } from 'lucide-react';
 import type { Department, Document, User } from '@/types/api';
 import { DocumentTagQuickCreate, type QuickDocumentTag } from './DocumentTagQuickCreate';
+import {
+  DocumentAudienceSelector,
+  type DocumentAudienceMode,
+} from './DocumentAudienceSelector';
 
 type DocumentTagOption = NonNullable<Document["tags"]>[number];
 
@@ -44,8 +45,11 @@ interface DocumentUpdatePayload {
   is_regulation?: boolean;
   sent_to_all?: boolean;
   acknowledgement_required?: boolean;
+  acknowledgement_for_all?: boolean;
   recipient_ids?: number[];
   department_ids?: number[];
+  acknowledgement_recipient_ids?: number[];
+  acknowledgement_department_ids?: number[];
 }
 
 interface DocumentMetadataEditorProps {
@@ -75,14 +79,6 @@ function formatFileSize(bytes?: number): string {
   return `${(bytes / 1024 / 1024).toFixed(2)} МБ`;
 }
 
-function getEmployeeLabel(employee: User): string {
-  const name = [employee.last_name, employee.first_name, employee.patronymic]
-    .filter(Boolean)
-    .join(' ')
-    .trim();
-  return employee.email ? `${name || employee.email} (${employee.email})` : name || `ID ${employee.id}`;
-}
-
 function buildFolderOptionRows(folders: FolderOption[]): FolderOptionRow[] {
   const childrenByParent = new Map<number | null, FolderOption[]>();
 
@@ -123,9 +119,17 @@ export function DocumentMetadataEditor({
   const [selectedFolder, setSelectedFolder] = useState<number | null>(document.folder?.id || null);
   const [isRegulation, setIsRegulation] = useState(Boolean(document.is_regulation));
   const [sentToAll, setSentToAll] = useState(Boolean(document.sent_to_all ?? true));
-  const [acknowledgementRequired, setAcknowledgementRequired] = useState(Boolean(document.acknowledgement_required));
+  const [acknowledgementMode, setAcknowledgementMode] = useState<DocumentAudienceMode>(
+    !document.acknowledgement_required
+      ? 'none'
+      : document.acknowledgement_for_all === false
+        ? 'restricted'
+        : 'all'
+  );
   const [selectedDepartments, setSelectedDepartments] = useState<number[]>([]);
   const [selectedRecipients, setSelectedRecipients] = useState<number[]>([]);
+  const [acknowledgementDepartments, setAcknowledgementDepartments] = useState<number[]>([]);
+  const [acknowledgementRecipients, setAcknowledgementRecipients] = useState<number[]>([]);
 
   const [documentTags, setDocumentTags] = useState<DocumentTagOption[]>([]);
   const [folders, setFolders] = useState<FolderOption[]>([]);
@@ -149,9 +153,21 @@ export function DocumentMetadataEditor({
     setSelectedFolder(document.folder?.id || null);
     setIsRegulation(Boolean(document.is_regulation));
     setSentToAll(Boolean(document.sent_to_all ?? true));
-    setAcknowledgementRequired(Boolean(document.acknowledgement_required));
+    setAcknowledgementMode(
+      !document.acknowledgement_required
+        ? 'none'
+        : document.acknowledgement_for_all === false
+          ? 'restricted'
+          : 'all'
+    );
     setSelectedDepartments((document.departments || []).map((department) => department.id));
     setSelectedRecipients((document.recipients || []).map((recipient) => recipient.id));
+    setAcknowledgementDepartments(
+      (document.acknowledgement_departments || []).map((department) => department.id)
+    );
+    setAcknowledgementRecipients(
+      (document.acknowledgement_recipients || []).map((recipient) => recipient.id)
+    );
     setError(null);
   }, [isOpen, document]);
 
@@ -193,6 +209,30 @@ export function DocumentMetadataEditor({
     };
   }, [isOpen]);
 
+  const acknowledgementEmployees = useMemo(() => {
+    if (sentToAll) return employees;
+    const departmentIds = new Set(selectedDepartments);
+    const recipientIds = new Set(selectedRecipients);
+    return employees.filter((employee) => (
+      recipientIds.has(employee.id)
+      || (employee.departments || []).some((department) => departmentIds.has(department.id))
+    ));
+  }, [employees, selectedDepartments, selectedRecipients, sentToAll]);
+
+  const acknowledgementDepartmentOptions = useMemo(() => {
+    if (sentToAll) return departments;
+    const departmentIds = new Set(selectedDepartments);
+    return departments.filter((department) => departmentIds.has(department.id));
+  }, [departments, selectedDepartments, sentToAll]);
+
+  useEffect(() => {
+    if (sentToAll) return;
+    const allowedEmployeeIds = new Set(acknowledgementEmployees.map((employee) => employee.id));
+    const allowedDepartmentIds = new Set(selectedDepartments);
+    setAcknowledgementRecipients((current) => current.filter((id) => allowedEmployeeIds.has(id)));
+    setAcknowledgementDepartments((current) => current.filter((id) => allowedDepartmentIds.has(id)));
+  }, [acknowledgementEmployees, selectedDepartments, sentToAll]);
+
   const toggleTag = (tagId: number) => {
     setSelectedTags((prev) =>
       prev.includes(tagId) ? prev.filter((id) => id !== tagId) : [...prev, tagId]
@@ -221,6 +261,15 @@ export function DocumentMetadataEditor({
       return;
     }
 
+    if (
+      acknowledgementMode === 'restricted'
+      && acknowledgementDepartments.length === 0
+      && acknowledgementRecipients.length === 0
+    ) {
+      setError('Выберите хотя бы один отдел или сотрудника для ознакомления');
+      return;
+    }
+
     setIsSaving(true);
 
     try {
@@ -228,6 +277,12 @@ export function DocumentMetadataEditor({
       const currentTagIds = (document.tags || []).map((tag) => tag.id);
       const currentDepartmentIds = (document.departments || []).map((department) => department.id);
       const currentRecipientIds = (document.recipients || []).map((recipient) => recipient.id);
+      const currentAcknowledgementDepartmentIds = (document.acknowledgement_departments || []).map(
+        (department) => department.id
+      );
+      const currentAcknowledgementRecipientIds = (document.acknowledgement_recipients || []).map(
+        (recipient) => recipient.id
+      );
       const currentFolder = document.folder?.id || null;
       const currentSentToAll = Boolean(document.sent_to_all ?? true);
 
@@ -259,9 +314,14 @@ export function DocumentMetadataEditor({
         updateData.sent_to_all = sentToAll;
       }
 
+      const acknowledgementRequired = acknowledgementMode !== 'none';
+      const acknowledgementForAll = acknowledgementMode === 'all';
       if (acknowledgementRequired !== Boolean(document.acknowledgement_required)) {
         updateData.acknowledgement_required = acknowledgementRequired;
       }
+      if (acknowledgementForAll !== Boolean(document.acknowledgement_for_all ?? true)) {
+        updateData.acknowledgement_for_all = acknowledgementForAll;
+      }
 
       if (!arraysEqual(currentTagIds, selectedTags)) {
         updateData.tag_ids = selectedTags;
@@ -277,6 +337,15 @@ export function DocumentMetadataEditor({
         }
       }
 
+      if (acknowledgementMode === 'restricted') {
+        if (!arraysEqual(currentAcknowledgementDepartmentIds, acknowledgementDepartments)) {
+          updateData.acknowledgement_department_ids = acknowledgementDepartments;
+        }
+        if (!arraysEqual(currentAcknowledgementRecipientIds, acknowledgementRecipients)) {
+          updateData.acknowledgement_recipient_ids = acknowledgementRecipients;
+        }
+      }
+
       if (Object.keys(updateData).length === 0) {
         toast.info('Нет изменений для сохранения');
         onClose();
@@ -518,125 +587,36 @@ export function DocumentMetadataEditor({
           </div>
         </section>
 
-        <section className="space-y-3">
-          <div className="flex items-center gap-2 text-sm font-semibold text-[var(--foreground)]">
-            <Users className="h-4 w-4" />
-            Доступ и ознакомление
+        <section className="space-y-6">
+          <DocumentAudienceSelector
+            kind="access"
+            mode={sentToAll ? 'all' : 'restricted'}
+            onModeChange={(mode) => setSentToAll(mode === 'all')}
+            employees={employees}
+            departments={departments}
+            selectedEmployeeIds={selectedRecipients}
+            selectedDepartmentIds={selectedDepartments}
+            onSelectedEmployeeIdsChange={setSelectedRecipients}
+            onSelectedDepartmentIdsChange={setSelectedDepartments}
+            loading={loadingReferences}
+            disabled={isSaving}
+          />
+
+          <div className="app-divider border-t pt-5">
+            <DocumentAudienceSelector
+              kind="acknowledgement"
+              mode={acknowledgementMode}
+              onModeChange={setAcknowledgementMode}
+              employees={acknowledgementEmployees}
+              departments={acknowledgementDepartmentOptions}
+              selectedEmployeeIds={acknowledgementRecipients}
+              selectedDepartmentIds={acknowledgementDepartments}
+              onSelectedEmployeeIdsChange={setAcknowledgementRecipients}
+              onSelectedDepartmentIdsChange={setAcknowledgementDepartments}
+              loading={loadingReferences}
+              disabled={isSaving}
+            />
           </div>
-
-          <div className="grid grid-cols-1 gap-3 lg:grid-cols-2">
-            <div className="app-surface-muted flex items-start gap-3 rounded-lg p-3">
-              <input
-                type="checkbox"
-                id="metadataSentToAll"
-                checked={sentToAll}
-                onChange={(event) => {
-                  setSentToAll(event.target.checked);
-                  if (event.target.checked) {
-                    setSelectedDepartments([]);
-                    setSelectedRecipients([]);
-                  }
-                }}
-                disabled={isSaving}
-                className="mt-0.5 h-4 w-4 rounded border-[var(--border-strong)] text-[var(--accent-primary)] disabled:opacity-50"
-              />
-              <div className="flex-1">
-                <label htmlFor="metadataSentToAll" className="block cursor-pointer text-sm font-medium text-[var(--foreground)]">
-                  Для всей компании
-                </label>
-                <p className="app-text-muted mt-0.5 text-xs">Документ доступен всем активным сотрудникам.</p>
-              </div>
-            </div>
-
-            <div className="app-surface-muted flex items-start gap-3 rounded-lg p-3">
-              <input
-                type="checkbox"
-                id="metadataAcknowledgementRequired"
-                checked={acknowledgementRequired}
-                onChange={(event) => setAcknowledgementRequired(event.target.checked)}
-                disabled={isSaving}
-                className="mt-0.5 h-4 w-4 rounded border-[var(--border-strong)] text-[var(--accent-primary)] disabled:opacity-50"
-              />
-              <div className="flex-1">
-                <label htmlFor="metadataAcknowledgementRequired" className="block cursor-pointer text-sm font-medium text-[var(--foreground)]">
-                  <CheckCircle className="mr-1 inline h-4 w-4" />
-                  Требуется ознакомление
-                </label>
-                <p className="app-text-muted mt-0.5 text-xs">Получатели должны подтвердить прочтение документа.</p>
-              </div>
-            </div>
-          </div>
-
-          {!sentToAll && (
-            <div className="app-surface-muted grid grid-cols-1 gap-4 rounded-lg p-4 lg:grid-cols-2">
-              <div>
-                <label htmlFor="metadataDepartments" className="mb-1.5 block text-sm font-medium text-[var(--foreground)]">
-                  <Building2 className="mr-1 inline h-4 w-4" />
-                  Отделы
-                </label>
-                <select
-                  id="metadataDepartments"
-                  multiple
-                  value={selectedDepartments.map(String)}
-                  onChange={(event) => {
-                    const values = Array.from(event.target.selectedOptions, (option) => Number(option.value));
-                    setSelectedDepartments(values);
-                  }}
-                  disabled={loadingReferences || isSaving}
-                  className="app-select w-full rounded-lg px-3 py-2 text-sm"
-                  size={7}
-                >
-                  {departments.length === 0 ? (
-                    <option disabled>Нет доступных отделов</option>
-                  ) : (
-                    departments.map((department) => (
-                      <option key={department.id} value={department.id}>
-                        {department.name}
-                      </option>
-                    ))
-                  )}
-                </select>
-                <p className="app-text-muted mt-1 text-xs">Удерживайте Ctrl/Cmd для выбора нескольких.</p>
-              </div>
-
-              <div>
-                <label htmlFor="metadataRecipients" className="mb-1.5 block text-sm font-medium text-[var(--foreground)]">
-                  <Users className="mr-1 inline h-4 w-4" />
-                  Сотрудники
-                </label>
-                <select
-                  id="metadataRecipients"
-                  multiple
-                  value={selectedRecipients.map(String)}
-                  onChange={(event) => {
-                    const values = Array.from(event.target.selectedOptions, (option) => Number(option.value));
-                    setSelectedRecipients(values);
-                  }}
-                  disabled={loadingReferences || isSaving}
-                  className="app-select w-full rounded-lg px-3 py-2 text-sm"
-                  size={7}
-                >
-                  {employees.length === 0 ? (
-                    <option disabled>Нет доступных сотрудников</option>
-                  ) : (
-                    employees.map((employee) => (
-                      <option key={employee.id} value={employee.id}>
-                        {getEmployeeLabel(employee)}
-                      </option>
-                    ))
-                  )}
-                </select>
-                <p className="app-text-muted mt-1 text-xs">Можно выбрать сотрудников напрямую, отделы или оба варианта.</p>
-              </div>
-
-              {selectedDepartments.length === 0 && selectedRecipients.length === 0 && (
-                <div className="app-feedback-warning flex items-start gap-2 rounded-lg p-3 text-xs lg:col-span-2">
-                  <AlertCircle className="mt-0.5 h-4 w-4 shrink-0" />
-                  <span>Выберите хотя бы один отдел или сотрудника.</span>
-                </div>
-              )}
-            </div>
-          )}
         </section>
 
         <div className="app-divider sticky bottom-0 z-10 -mx-4 flex items-center justify-end gap-3 border-t bg-[var(--surface-elevated)] px-4 pt-4 sm:-mx-6 sm:px-6">
diff --git a/frontend/src/components/documents/DocumentUploadForm.tsx b/frontend/src/components/documents/DocumentUploadForm.tsx
index 1ef30d2d..4452f2ce 100644
--- a/frontend/src/components/documents/DocumentUploadForm.tsx
+++ b/frontend/src/components/documents/DocumentUploadForm.tsx
@@ -9,28 +9,18 @@ import {
   AlertCircle, 
   Loader2, 
   FolderOpen,
-  Users,
-  Building2,
-  CheckCircle,
   ScrollText,
   Tag as TagIcon,
 } from "lucide-react";
 import { apiClient } from "@/lib/api";
+import type { Department, User } from "@/types/api";
 import { toast } from "sonner";
 import { processDocument, needsProcessing, type ProcessingProgress } from "@/lib/document-utils";
 import { DocumentTagQuickCreate, type QuickDocumentTag } from "./DocumentTagQuickCreate";
-
-interface Department {
-  id: number;
-  name: string;
-}
-
-interface User {
-  id: number;
-  first_name: string;
-  last_name: string;
-  email?: string;
-}
+import {
+  DocumentAudienceSelector,
+  type DocumentAudienceMode,
+} from "./DocumentAudienceSelector";
 
 interface DocumentTagOption {
   id: number;
@@ -54,6 +44,7 @@ interface DocumentUploadFormProps {
   onSuccess?: () => void;
   onCancel?: () => void;
   currentFolderId?: number | null;
+  defaultIsRegulation?: boolean;
 }
 
 interface UploadFileItem {
@@ -127,7 +118,12 @@ const STAGE_MESSAGES: Record<string, string> = {
   complete: "Обработка завершена",
 };
 
-export function DocumentUploadForm({ onSuccess, onCancel, currentFolderId }: DocumentUploadFormProps) {
+export function DocumentUploadForm({
+  onSuccess,
+  onCancel,
+  currentFolderId,
+  defaultIsRegulation = false,
+}: DocumentUploadFormProps) {
   const [title, setTitle] = useState("");
   const [description, setDescription] = useState("");
   const [uploadItems, setUploadItems] = useState<UploadFileItem[]>([]);
@@ -138,14 +134,16 @@ export function DocumentUploadForm({ onSuccess, onCancel, currentFolderId }: Doc
 
   // New fields for extended functionality
   const [sentToAll, setSentToAll] = useState(true);
-  const [acknowledgementRequired, setAcknowledgementRequired] = useState(false);
+  const [acknowledgementMode, setAcknowledgementMode] = useState<DocumentAudienceMode>("all");
   const [selectedDepartments, setSelectedDepartments] = useState<number[]>([]);
   const [selectedRecipients, setSelectedRecipients] = useState<number[]>([]);
+  const [acknowledgementDepartments, setAcknowledgementDepartments] = useState<number[]>([]);
+  const [acknowledgementRecipients, setAcknowledgementRecipients] = useState<number[]>([]);
   
   // Metadata fields
   const [selectedFolderId, setSelectedFolderId] = useState<number | null>(currentFolderId ?? null);
   const [selectedTags, setSelectedTags] = useState<number[]>([]);
-  const [isRegulation, setIsRegulation] = useState(false);
+  const [isRegulation, setIsRegulation] = useState(defaultIsRegulation);
   
   // Data for selects
   const [departments, setDepartments] = useState<Department[]>([]);
@@ -178,7 +176,11 @@ export function DocumentUploadForm({ onSuccess, onCancel, currentFolderId }: Doc
 
       try {
         setLoadingEmployees(true);
-        const empResponse = await apiClient.getEmployees({ limit: 1000 });
+        const empResponse = await apiClient.getEmployees({
+          limit: 1000,
+          is_active: true,
+          ordering: "last_name,first_name",
+        });
         setEmployees(empResponse.results || empResponse);
       } catch (err) {
         console.error("Ошибка загрузки сотрудников:", err);
@@ -211,6 +213,30 @@ export function DocumentUploadForm({ onSuccess, onCancel, currentFolderId }: Doc
     loadData();
   }, []);
 
+  const acknowledgementEmployees = useMemo(() => {
+    if (sentToAll) return employees;
+    const departmentIds = new Set(selectedDepartments);
+    const recipientIds = new Set(selectedRecipients);
+    return employees.filter((employee) => (
+      recipientIds.has(employee.id)
+      || (employee.departments || []).some((department) => departmentIds.has(department.id))
+    ));
+  }, [employees, selectedDepartments, selectedRecipients, sentToAll]);
+
+  const acknowledgementDepartmentOptions = useMemo(() => {
+    if (sentToAll) return departments;
+    const departmentIds = new Set(selectedDepartments);
+    return departments.filter((department) => departmentIds.has(department.id));
+  }, [departments, selectedDepartments, sentToAll]);
+
+  useEffect(() => {
+    if (sentToAll) return;
+    const allowedEmployeeIds = new Set(acknowledgementEmployees.map((employee) => employee.id));
+    const allowedDepartmentIds = new Set(selectedDepartments);
+    setAcknowledgementRecipients((current) => current.filter((id) => allowedEmployeeIds.has(id)));
+    setAcknowledgementDepartments((current) => current.filter((id) => allowedDepartmentIds.has(id)));
+  }, [acknowledgementEmployees, selectedDepartments, sentToAll]);
+
   const onDrop = useCallback(async (acceptedFiles: File[]) => {
     if (acceptedFiles.length === 0) return;
 
@@ -230,7 +256,7 @@ export function DocumentUploadForm({ onSuccess, onCancel, currentFolderId }: Doc
 
     setIsProcessing(true);
     setProcessingProgress({
-      stage: "compressing",
+      stage: "extracting_text",
       progress: 0,
       message: "Начало обработки...",
     });
@@ -244,7 +270,6 @@ export function DocumentUploadForm({ onSuccess, onCancel, currentFolderId }: Doc
         try {
           const result = await processDocument(item.file, {
             enableOCR: true,
-            enableCompression: true,
             enableTextExtraction: true,
             enableThumbnail: true,
             onProgress: (progress) => {
@@ -340,7 +365,16 @@ export function DocumentUploadForm({ onSuccess, onCancel, currentFolderId }: Doc
 
     // Validate recipients if sent_to_all is false
     if (!sentToAll && selectedDepartments.length === 0 && selectedRecipients.length === 0) {
-      setError("Укажите получателей или отделы, либо выберите 'Отправить всем'");
+      setError("Выберите хотя бы один отдел или сотрудника с доступом к документу");
+      return;
+    }
+
+    if (
+      acknowledgementMode === "restricted"
+      && acknowledgementDepartments.length === 0
+      && acknowledgementRecipients.length === 0
+    ) {
+      setError("Выберите хотя бы один отдел или сотрудника для ознакомления");
       return;
     }
 
@@ -356,7 +390,12 @@ export function DocumentUploadForm({ onSuccess, onCancel, currentFolderId }: Doc
           is_regulation: isRegulation,
           department_ids: sentToAll ? undefined : selectedDepartments,
           recipient_ids: sentToAll ? undefined : selectedRecipients,
-          acknowledgement_required: acknowledgementRequired,
+          acknowledgement_required: acknowledgementMode !== "none",
+          acknowledgement_for_all: acknowledgementMode === "all",
+          acknowledgement_department_ids:
+            acknowledgementMode === "restricted" ? acknowledgementDepartments : undefined,
+          acknowledgement_recipient_ids:
+            acknowledgementMode === "restricted" ? acknowledgementRecipients : undefined,
           tag_ids: selectedTags.length > 0 ? selectedTags : undefined,
         });
       } else {
@@ -376,7 +415,12 @@ export function DocumentUploadForm({ onSuccess, onCancel, currentFolderId }: Doc
             is_regulation: isRegulation,
             department_ids: sentToAll ? undefined : selectedDepartments,
             recipient_ids: sentToAll ? undefined : selectedRecipients,
-            acknowledgement_required: acknowledgementRequired,
+            acknowledgement_required: acknowledgementMode !== "none",
+            acknowledgement_for_all: acknowledgementMode === "all",
+            acknowledgement_department_ids:
+              acknowledgementMode === "restricted" ? acknowledgementDepartments : undefined,
+            acknowledgement_recipient_ids:
+              acknowledgementMode === "restricted" ? acknowledgementRecipients : undefined,
             tag_ids: selectedTags.length > 0 ? selectedTags : undefined,
           });
         }
@@ -396,10 +440,12 @@ export function DocumentUploadForm({ onSuccess, onCancel, currentFolderId }: Doc
       setUploadItems([]);
       setSelectedFolderId(currentFolderId ?? null);
       setSentToAll(true);
-      setIsRegulation(false);
-      setAcknowledgementRequired(false);
+      setIsRegulation(defaultIsRegulation);
+      setAcknowledgementMode("all");
       setSelectedDepartments([]);
       setSelectedRecipients([]);
+      setAcknowledgementDepartments([]);
+      setAcknowledgementRecipients([]);
       setSelectedTags([]);
       
       if (onSuccess) {
@@ -717,140 +763,37 @@ export function DocumentUploadForm({ onSuccess, onCancel, currentFolderId }: Doc
         </div>
       )}
 
-      {/* Divider */}
       <div className="app-divider border-t pt-4">
-        <h3 className="mb-3 text-sm font-semibold text-[var(--foreground)]">Настройки доступа и уведомлений</h3>
-      </div>
+        <div className="space-y-6">
+          <DocumentAudienceSelector
+            kind="access"
+            mode={sentToAll ? "all" : "restricted"}
+            onModeChange={(mode) => setSentToAll(mode === "all")}
+            employees={employees}
+            departments={departments}
+            selectedEmployeeIds={selectedRecipients}
+            selectedDepartmentIds={selectedDepartments}
+            onSelectedEmployeeIdsChange={setSelectedRecipients}
+            onSelectedDepartmentIdsChange={setSelectedDepartments}
+            loading={loadingEmployees || loadingDepartments}
+            disabled={isSubmitting}
+          />
 
-      {/* Sent to All Toggle */}
-      <div className="app-surface-muted flex items-start gap-3 rounded-lg p-3">
-        <input
-          type="checkbox"
-          id="sentToAll"
-          checked={sentToAll}
-          onChange={(e) => {
-            setSentToAll(e.target.checked);
-            if (e.target.checked) {
-              setSelectedDepartments([]);
-              setSelectedRecipients([]);
-            }
-          }}
-          className="mt-0.5 h-4 w-4 rounded border-[var(--border-strong)] text-[var(--accent-primary)]"
-        />
-        <div className="flex-1">
-          <label htmlFor="sentToAll" className="block cursor-pointer text-sm font-medium text-[var(--foreground)]">
-            Отправить всем сотрудникам
-          </label>
-          <p className="app-text-muted mt-0.5 text-xs">
-            Документ будет доступен всем активным сотрудникам
-          </p>
-        </div>
-      </div>
-
-      {/* Recipients section - only show when sentToAll is false */}
-      {!sentToAll && (
-        <div className="app-surface-muted space-y-4 rounded-lg p-4">
-          <div className="flex items-center gap-2 text-sm font-medium text-[var(--foreground)]">
-            <Users size={16} />
-            <span>Выберите получателей</span>
+          <div className="app-divider border-t pt-5">
+            <DocumentAudienceSelector
+              kind="acknowledgement"
+              mode={acknowledgementMode}
+              onModeChange={setAcknowledgementMode}
+              employees={acknowledgementEmployees}
+              departments={acknowledgementDepartmentOptions}
+              selectedEmployeeIds={acknowledgementRecipients}
+              selectedDepartmentIds={acknowledgementDepartments}
+              onSelectedEmployeeIdsChange={setAcknowledgementRecipients}
+              onSelectedDepartmentIdsChange={setAcknowledgementDepartments}
+              loading={loadingEmployees || loadingDepartments}
+              disabled={isSubmitting}
+            />
           </div>
-
-          {/* Departments */}
-          <div>
-            <label htmlFor="departments" className="mb-1.5 block text-sm font-medium text-[var(--foreground)]">
-              <Building2 size={14} className="mr-1 inline" />
-              Отделы
-            </label>
-            <select
-              id="departments"
-              multiple
-              value={selectedDepartments.map(String)}
-              onChange={(e) => {
-                const values = Array.from(e.target.selectedOptions, (option) => Number(option.value));
-                setSelectedDepartments(values);
-              }}
-              disabled={loadingDepartments}
-              className="app-select w-full rounded-lg px-3 py-2 text-sm"
-              size={5}
-            >
-              {loadingDepartments ? (
-                <option disabled>Загрузка...</option>
-              ) : departments.length === 0 ? (
-                <option disabled>Нет доступных отделов</option>
-              ) : (
-                departments.map((dept) => (
-                  <option key={dept.id} value={dept.id}>
-                    {dept.name}
-                  </option>
-                ))
-              )}
-            </select>
-            <p className="app-text-muted mt-1 text-xs">
-              Удерживайте Ctrl/Cmd для выбора нескольких
-            </p>
-          </div>
-
-          {/* Recipients */}
-          <div>
-            <label htmlFor="recipients" className="mb-1.5 block text-sm font-medium text-[var(--foreground)]">
-              <Users size={14} className="mr-1 inline" />
-              Конкретные сотрудники
-            </label>
-            <select
-              id="recipients"
-              multiple
-              value={selectedRecipients.map(String)}
-              onChange={(e) => {
-                const values = Array.from(e.target.selectedOptions, (option) => Number(option.value));
-                setSelectedRecipients(values);
-              }}
-              disabled={loadingEmployees}
-              className="app-select w-full rounded-lg px-3 py-2 text-sm"
-              size={8}
-            >
-              {loadingEmployees ? (
-                <option disabled>Загрузка...</option>
-              ) : employees.length === 0 ? (
-                <option disabled>Нет доступных сотрудников</option>
-              ) : (
-                employees.map((emp) => (
-                  <option key={emp.id} value={emp.id}>
-                    {emp.last_name} {emp.first_name} {emp.email && `(${emp.email})`}
-                  </option>
-                ))
-              )}
-            </select>
-            <p className="app-text-muted mt-1 text-xs">
-              Удерживайте Ctrl/Cmd для выбора нескольких
-            </p>
-          </div>
-
-          {selectedDepartments.length === 0 && selectedRecipients.length === 0 && (
-            <div className="app-feedback-warning flex items-start gap-2 rounded-lg p-3 text-xs">
-              <AlertCircle size={14} className="mt-0.5 shrink-0" />
-              <span>Выберите хотя бы один отдел или сотрудника</span>
-            </div>
-          )}
-        </div>
-      )}
-
-      {/* Acknowledgement Required */}
-      <div className="app-surface-muted flex items-start gap-3 rounded-lg p-3">
-        <input
-          type="checkbox"
-          id="acknowledgementRequired"
-          checked={acknowledgementRequired}
-          onChange={(e) => setAcknowledgementRequired(e.target.checked)}
-          className="mt-0.5 h-4 w-4 rounded border-[var(--border-strong)] text-[var(--accent-primary)]"
-        />
-        <div className="flex-1">
-          <label htmlFor="acknowledgementRequired" className="block cursor-pointer text-sm font-medium text-[var(--foreground)]">
-            <CheckCircle size={14} className="mr-1 inline" />
-            Требуется подтверждение ознакомления
-          </label>
-          <p className="app-text-muted mt-0.5 text-xs">
-            Получатели должны будут подтвердить, что ознакомились с документом
-          </p>
         </div>
       </div>
 
@@ -870,8 +813,8 @@ export function DocumentUploadForm({ onSuccess, onCancel, currentFolderId }: Doc
               : uploadItems.length > 1
                 ? `Загрузить ${uploadItems.length} документов`
                 : uploadItems.length === 1
-                  ? "Загрузить документ"
-                  : "Создать документ"}
+                  ? isRegulation ? "Загрузить регламент" : "Загрузить документ"
+                  : isRegulation ? "Создать регламент" : "Создать документ"}
         </button>
         
         {onCancel && (
diff --git a/frontend/src/components/documents/comments/CommentItem.tsx b/frontend/src/components/documents/comments/CommentItem.tsx
index d4e5544d..71dfd73c 100644
--- a/frontend/src/components/documents/comments/CommentItem.tsx
+++ b/frontend/src/components/documents/comments/CommentItem.tsx
@@ -35,7 +35,7 @@ export default function CommentItem({
 
   const handleEdit = async () => {
     try {
-      const updated = await apiClient.updateDocumentComment(comment.id, editText);
+      const updated = await apiClient.updateDocumentComment(comment.document, comment.id, editText);
       onCommentUpdated(updated);
       setIsEditing(false);
     } catch (err) {
@@ -49,7 +49,7 @@ export default function CommentItem({
 
     try {
       setIsDeleting(true);
-      await apiClient.deleteDocumentComment(comment.id);
+      await apiClient.deleteDocumentComment(comment.document, comment.id);
       onCommentDeleted(comment.id);
     } catch (err) {
       console.error('Failed to delete comment:', err);
diff --git a/frontend/src/components/feed/ExpandableFeedText.tsx b/frontend/src/components/feed/ExpandableFeedText.tsx
new file mode 100644
index 00000000..febb0d24
--- /dev/null
+++ b/frontend/src/components/feed/ExpandableFeedText.tsx
@@ -0,0 +1,37 @@
+"use client";
+
+import { useState } from "react";
+import { ChevronDown, ChevronUp } from "lucide-react";
+
+type ExpandableFeedTextProps = {
+  text: string;
+  className?: string;
+};
+
+export function ExpandableFeedText({ text, className = "" }: ExpandableFeedTextProps) {
+  const [expanded, setExpanded] = useState(false);
+  const isLong = text.length > 320 || text.split("\n").length > 6;
+
+  return (
+    <div>
+      <p
+        className={`app-text-wrap whitespace-pre-line text-sm leading-6 text-[var(--foreground)] ${
+          isLong && !expanded ? "line-clamp-6" : ""
+        } ${className}`}
+      >
+        {text}
+      </p>
+      {isLong ? (
+        <button
+          type="button"
+          onClick={() => setExpanded((current) => !current)}
+          className="app-accent-text mt-1 inline-flex items-center gap-1 py-1 text-xs font-medium hover:text-[var(--accent-primary-strong)]"
+          aria-expanded={expanded}
+        >
+          {expanded ? <ChevronUp size={14} /> : <ChevronDown size={14} />}
+          {expanded ? "Скрыть" : "Подробнее"}
+        </button>
+      ) : null}
+    </div>
+  );
+}
diff --git a/frontend/src/components/feed/FeedPostCard.tsx b/frontend/src/components/feed/FeedPostCard.tsx
index e46c4b8e..4e127eba 100644
--- a/frontend/src/components/feed/FeedPostCard.tsx
+++ b/frontend/src/components/feed/FeedPostCard.tsx
@@ -6,6 +6,7 @@ import type { ReactNode } from "react";
 import { Heart, MessageSquare, Paperclip, Pin } from "lucide-react";
 
 import { RequestAvatar } from "@/components/requests/RequestAvatar";
+import { ExpandableFeedText } from "@/components/feed/ExpandableFeedText";
 import { resolveMediaUrl } from "@/lib/url";
 import type { Post } from "@/types/api";
 
@@ -136,9 +137,7 @@ export function FeedPostCard({
       ) : null}
 
       {postText ? (
-        <p className="app-text-wrap whitespace-pre-line text-sm leading-6 text-[var(--foreground)]">
-          {postText}
-        </p>
+        <ExpandableFeedText text={postText} />
       ) : null}
 
       {resolvedImageSrc ? (
diff --git a/frontend/src/components/feed/FeedRegulationCard.tsx b/frontend/src/components/feed/FeedRegulationCard.tsx
new file mode 100644
index 00000000..f9479bb5
--- /dev/null
+++ b/frontend/src/components/feed/FeedRegulationCard.tsx
@@ -0,0 +1,387 @@
+"use client";
+
+import Link from "next/link";
+import { useEffect, useRef, useState } from "react";
+import {
+  CheckCircle2,
+  ChevronRight,
+  Download,
+  Eye,
+  FileText,
+  FolderOpen,
+  Link2,
+  Loader2,
+  MessageSquare,
+  Pencil,
+  ScrollText,
+  Trash2,
+  Users,
+} from "lucide-react";
+
+import { ExpandableFeedText } from "@/components/feed/ExpandableFeedText";
+import { RequestAvatar } from "@/components/requests/RequestAvatar";
+import TaskLinkPill from "@/components/tasks/TaskLinkPill";
+import { canPreviewDocument } from "@/lib/document-preview";
+import { userProfileLink } from "@/lib/shared";
+import type { Document } from "@/types/api";
+
+type FeedRegulationCardProps = {
+  currentUserId?: number | null;
+  document: Document;
+  isAcknowledging?: boolean;
+  onAcknowledge: (document: Document) => void;
+  onDelete: (document: Document) => void;
+  onEdit: (document: Document) => void;
+  onLinkTask: (document: Document) => void;
+  onMove: (document: Document) => void;
+  onOpen: (document: Document) => void;
+  onOpenAcknowledgements: (document: Document) => void;
+  onOpenComments: (document: Document) => void;
+  onPreview: (document: Document) => void;
+};
+
+function formatTimeAgo(value?: string) {
+  if (!value) return "";
+  const date = new Date(value);
+  const diffMs = Date.now() - date.getTime();
+  if (!Number.isFinite(diffMs) || diffMs < 60_000) return "только что";
+  const diffHours = Math.floor(diffMs / 3_600_000);
+  if (diffHours < 24) return `${diffHours} ч. назад`;
+  return `${Math.floor(diffHours / 24)} дн. назад`;
+}
+
+function uploaderName(document: Document) {
+  const uploader = document.uploaded_by || document.created_by;
+  const name = `${uploader?.last_name || ""} ${uploader?.first_name || ""}`.trim();
+  return name || uploader?.email || "Сотрудник";
+}
+
+export function FeedRegulationCard({
+  currentUserId,
+  document,
+  isAcknowledging = false,
+  onAcknowledge,
+  onDelete,
+  onEdit,
+  onLinkTask,
+  onMove,
+  onOpen,
+  onOpenAcknowledgements,
+  onOpenComments,
+  onPreview,
+}: FeedRegulationCardProps) {
+  const [menuOpen, setMenuOpen] = useState(false);
+  const menuRef = useRef<HTMLDivElement | null>(null);
+  const uploader = document.uploaded_by || document.created_by;
+  const name = uploaderName(document);
+  const initials = `${uploader?.last_name?.[0] || ""}${uploader?.first_name?.[0] || ""}`.toUpperCase() || "Р";
+  const linkedTasks = document.linked_tasks || [];
+  const uploadedAt = document.uploaded_at || document.created_at;
+  const acknowledgementRequiredForUser =
+    document.acknowledgement_required_for_user ?? document.acknowledgement_required;
+  const acknowledgedCount = document.acknowledged_count || 0;
+  const acknowledgementTotal = document.acknowledgement_total || 0;
+  const commentsCount = document.comments_count || 0;
+  const hasPreview = Boolean(
+    document.file_url && canPreviewDocument(document.file_name || document.title),
+  );
+
+  useEffect(() => {
+    if (!menuOpen) return;
+
+    const handlePointerDown = (event: MouseEvent) => {
+      if (menuRef.current && !menuRef.current.contains(event.target as Node)) {
+        setMenuOpen(false);
+      }
+    };
+    const handleEscape = (event: KeyboardEvent) => {
+      if (event.key === "Escape") setMenuOpen(false);
+    };
+
+    window.document.addEventListener("mousedown", handlePointerDown);
+    window.document.addEventListener("keydown", handleEscape);
+    return () => {
+      window.document.removeEventListener("mousedown", handlePointerDown);
+      window.document.removeEventListener("keydown", handleEscape);
+    };
+  }, [menuOpen]);
+
+  return (
+    <article
+      className="app-surface rounded-2xl p-5"
+      style={{ borderColor: "var(--regulation-border)" }}
+    >
+      <header className="mb-3 flex items-start justify-between gap-3">
+        <div className="flex min-w-0 items-center gap-3">
+          <RequestAvatar
+            alt={name}
+            fallback={initials}
+            size="lg"
+            src={uploader?.avatar}
+          />
+          <div className="min-w-0">
+            {uploader ? (
+              <Link
+                href={userProfileLink(uploader, currentUserId)}
+                className="block truncate text-sm font-semibold text-[var(--foreground)] transition hover:text-[var(--accent-primary-strong)]"
+              >
+                {name}
+              </Link>
+            ) : (
+              <p className="truncate text-sm font-semibold text-[var(--foreground)]">{name}</p>
+            )}
+            <div className="app-text-muted flex flex-wrap items-center gap-1.5 text-xs">
+              <span>{formatTimeAgo(uploadedAt)}</span>
+              <span className="app-selected app-accent-text inline-flex items-center gap-1 rounded-full px-2 py-0.5 text-[11px] font-medium">
+                <ScrollText size={11} />
+                Регламент
+              </span>
+            </div>
+          </div>
+        </div>
+
+        <div ref={menuRef} className="relative shrink-0">
+          <button
+            type="button"
+            onClick={() => setMenuOpen((current) => !current)}
+            className="app-action-ghost flex h-8 w-8 items-center justify-center rounded-md"
+            title="Действия с регламентом"
+            aria-label={`Действия с регламентом ${document.title}`}
+            aria-expanded={menuOpen}
+            aria-haspopup="menu"
+          >
+            <ChevronRight
+              size={15}
+              className={`transition-transform duration-200 ${menuOpen ? "rotate-90" : ""}`}
+            />
+          </button>
+
+          {menuOpen ? (
+            <div className="app-menu absolute right-0 top-full z-30 mt-2 w-56 rounded-xl py-1.5" role="menu">
+              <button
+                type="button"
+                onClick={() => {
+                  setMenuOpen(false);
+                  onOpen(document);
+                }}
+                className="flex w-full items-center gap-2 px-3 py-2 text-left text-sm text-[var(--foreground)] transition hover:bg-[var(--surface-secondary)]"
+              >
+                <FileText size={14} />
+                Детали
+              </button>
+              <button
+                type="button"
+                onClick={() => {
+                  setMenuOpen(false);
+                  onEdit(document);
+                }}
+                className="flex w-full items-center gap-2 px-3 py-2 text-left text-sm text-[var(--foreground)] transition hover:bg-[var(--surface-secondary)]"
+              >
+                <Pencil size={14} />
+                Редактировать
+              </button>
+              <button
+                type="button"
+                onClick={() => {
+                  setMenuOpen(false);
+                  onMove(document);
+                }}
+                className="flex w-full items-center gap-2 px-3 py-2 text-left text-sm text-[var(--foreground)] transition hover:bg-[var(--surface-secondary)]"
+              >
+                <FolderOpen size={14} />
+                Переместить
+              </button>
+              {hasPreview ? (
+                <button
+                  type="button"
+                  onClick={() => {
+                    setMenuOpen(false);
+                    onPreview(document);
+                  }}
+                  className="flex w-full items-center gap-2 px-3 py-2 text-left text-sm text-[var(--foreground)] transition hover:bg-[var(--surface-secondary)]"
+                >
+                  <Eye size={14} />
+                  Предпросмотр
+                </button>
+              ) : null}
+              {document.file_url ? (
+                <a
+                  href={document.file_url}
+                  download={document.file_name || document.title}
+                  onClick={() => setMenuOpen(false)}
+                  className="flex w-full items-center gap-2 px-3 py-2 text-left text-sm text-[var(--foreground)] transition hover:bg-[var(--surface-secondary)]"
+                >
+                  <Download size={14} />
+                  Скачать
+                </a>
+              ) : null}
+              <button
+                type="button"
+                onClick={() => {
+                  setMenuOpen(false);
+                  onOpenComments(document);
+                }}
+                className="flex w-full items-center gap-2 px-3 py-2 text-left text-sm text-[var(--foreground)] transition hover:bg-[var(--surface-secondary)]"
+              >
+                <MessageSquare size={14} />
+                Комментарии ({commentsCount})
+              </button>
+              {document.acknowledgement_required ? (
+                <button
+                  type="button"
+                  onClick={() => {
+                    setMenuOpen(false);
+                    onOpenAcknowledgements(document);
+                  }}
+                  className="flex w-full items-center gap-2 px-3 py-2 text-left text-sm text-[var(--foreground)] transition hover:bg-[var(--surface-secondary)]"
+                >
+                  <Users size={14} />
+                  Ведомость ({acknowledgedCount}/{acknowledgementTotal})
+                </button>
+              ) : null}
+              {acknowledgementRequiredForUser && !document.is_acknowledged ? (
+                <button
+                  type="button"
+                  disabled={isAcknowledging}
+                  onClick={() => {
+                    setMenuOpen(false);
+                    onAcknowledge(document);
+                  }}
+                  className="flex w-full items-center gap-2 px-3 py-2 text-left text-sm text-[var(--foreground)] transition hover:bg-[var(--surface-secondary)] disabled:opacity-50"
+                >
+                  {isAcknowledging ? <Loader2 size={14} className="animate-spin" /> : <CheckCircle2 size={14} />}
+                  Ознакомился(лась)
+                </button>
+              ) : null}
+              <button
+                type="button"
+                onClick={() => {
+                  setMenuOpen(false);
+                  onLinkTask(document);
+                }}
+                className="flex w-full items-center gap-2 px-3 py-2 text-left text-sm text-[var(--foreground)] transition hover:bg-[var(--surface-secondary)]"
+              >
+                <Link2 size={14} />
+                Связать с задачей
+              </button>
+              <div className="my-1 border-t border-[var(--border-subtle)]" />
+              <button
+                type="button"
+                onClick={() => {
+                  setMenuOpen(false);
+                  onDelete(document);
+                }}
+                className="flex w-full items-center gap-2 px-3 py-2 text-left text-sm text-[var(--danger-foreground)] transition hover:bg-[var(--danger-soft)]"
+              >
+                <Trash2 size={14} />
+                Удалить
+              </button>
+            </div>
+          ) : null}
+        </div>
+      </header>
+
+      <button
+        type="button"
+        onClick={() => onOpen(document)}
+        className="block w-full text-left"
+      >
+        <h3 className="app-text-wrap text-base font-semibold text-[var(--foreground)]">
+          {document.title}
+        </h3>
+      </button>
+      {document.description ? (
+        <ExpandableFeedText text={document.description} className="mt-1" />
+      ) : null}
+
+      <div className="app-text-muted mt-3 flex flex-wrap items-center gap-2 text-xs">
+        {document.sent_to_all ? (
+          <span className="app-badge inline-flex items-center gap-1 rounded-full px-2 py-1">
+            <Users size={11} /> Для всей компании
+          </span>
+        ) : null}
+        {(document.departments || []).slice(0, 3).map((department) => (
+          <span key={department.id} className="app-badge rounded-full px-2 py-1">
+            {department.name}
+          </span>
+        ))}
+        {acknowledgementRequiredForUser ? (
+          <span className={`inline-flex items-center gap-1 rounded-full px-2 py-1 ${document.is_acknowledged ? "app-feedback-success" : "app-feedback-warning"}`}>
+            <CheckCircle2 size={11} />
+            {document.is_acknowledged ? "Ознакомлен" : "Требует ознакомления"}
+          </span>
+        ) : null}
+      </div>
+
+      <footer className="app-text-muted mt-4 flex flex-wrap items-center gap-3 text-sm">
+        <div className="flex flex-wrap items-center gap-1">
+          {acknowledgementRequiredForUser && !document.is_acknowledged ? (
+            <button
+              type="button"
+              onClick={() => onAcknowledge(document)}
+              disabled={isAcknowledging}
+              className="app-action-ghost inline-flex h-9 w-9 items-center justify-center rounded-lg disabled:cursor-not-allowed disabled:opacity-60"
+              title="Ознакомился(лась)"
+              aria-label="Ознакомился(лась)"
+            >
+              {isAcknowledging ? <Loader2 size={16} className="animate-spin" /> : <CheckCircle2 size={16} />}
+            </button>
+          ) : null}
+          {document.file_url ? (
+            <a
+              href={document.file_url}
+              download={document.file_name || document.title}
+              className="app-action-ghost inline-flex h-9 w-9 items-center justify-center rounded-lg"
+              title="Скачать"
+              aria-label="Скачать регламент"
+            >
+              <Download size={16} />
+            </a>
+          ) : null}
+        </div>
+
+        {linkedTasks.length > 0 ? (
+          <div className="flex max-w-full flex-wrap gap-1.5">
+            {linkedTasks.slice(0, 3).map((task) => (
+              <TaskLinkPill
+                key={task.link_id || task.id}
+                task={task}
+                maxTitleClassName="max-w-40"
+              />
+            ))}
+            {linkedTasks.length > 3 ? (
+              <span className="app-badge rounded-full px-2 py-0.5 text-[11px] font-medium">
+                +{linkedTasks.length - 3}
+              </span>
+            ) : null}
+          </div>
+        ) : null}
+
+        <div className="ml-auto flex flex-wrap items-center justify-end gap-1">
+          <button
+            type="button"
+            onClick={() => onOpenComments(document)}
+            className="app-action-ghost inline-flex h-9 items-center justify-center gap-1.5 rounded-lg px-2"
+            title="Комментарии"
+            aria-label={`Комментарии: ${commentsCount}`}
+          >
+            <MessageSquare size={16} className="app-text-muted" />
+            <span>{commentsCount}</span>
+          </button>
+          {document.acknowledgement_required ? (
+            <button
+              type="button"
+              onClick={() => onOpenAcknowledgements(document)}
+              className="app-action-ghost inline-flex h-9 items-center justify-center gap-1.5 rounded-lg px-2"
+              title="Ведомость ознакомлений"
+              aria-label={`Ведомость ознакомлений: ${acknowledgedCount} из ${acknowledgementTotal}`}
+            >
+              <Users size={16} />
+              <span>{acknowledgedCount}/{acknowledgementTotal}</span>
+            </button>
+          ) : null}
+        </div>
+      </footer>
+    </article>
+  );
+}
diff --git a/frontend/src/components/procurement/ProcurementRequestDetailContent.tsx b/frontend/src/components/procurement/ProcurementRequestDetailContent.tsx
index 8492f6d7..ac2d99b1 100644
--- a/frontend/src/components/procurement/ProcurementRequestDetailContent.tsx
+++ b/frontend/src/components/procurement/ProcurementRequestDetailContent.tsx
@@ -2,8 +2,9 @@
 
 import { useState } from "react";
 import Link from "next/link";
-import { AlertTriangle, Check, CheckCircle2, CircleDot, ExternalLink, MessageSquare, Minus, Plus, RotateCcw, Save, SlidersHorizontal, X } from "lucide-react";
+import { AlertTriangle, Check, CheckCircle2, CircleDot, Download, ExternalLink, MessageSquare, Minus, Paperclip, Plus, RotateCcw, Save, SlidersHorizontal, Trash2, X } from "lucide-react";
 import { RequestAvatar } from "@/components/requests/RequestAvatar";
+import { ProcurementRequestHistory } from "@/components/procurement/ProcurementRequestHistory";
 import { CommentComposer, CommentDeleteButton } from "@/components/shared/CommentControls";
 import { Modal } from "@/components/ui";
 
@@ -11,7 +12,7 @@ import { cleanLinkRows, linkHref, toLinkRows } from "@/lib/procurementLinks";
 import { getExpectedDeliveryDateBadgeClass } from "@/lib/procurementDates";
 import { getProcurementUnitLabel } from "@/lib/procurementUnits";
 import { formatDate, formatMoney, userProfileLink } from "@/lib/shared";
-import type { ProcurementItem, ProcurementItemComment, ProcurementItemExecutionStatus, ProcurementRequest, User } from "@/types/api";
+import type { ProcurementItem, ProcurementItemAttachment, ProcurementItemComment, ProcurementItemExecutionStatus, ProcurementRequest, User } from "@/types/api";
 
 interface ProcurementRequestDetailContentProps {
   currentUserId?: number | null;
@@ -37,6 +38,9 @@ interface ProcurementRequestDetailContentProps {
   onItemCommentDraftChange?: (itemId: number, value: string) => void;
   onAddItemComment?: (requestId: number, itemId: number) => void | Promise<void>;
   onDeleteItemComment?: (requestId: number, itemId: number, commentId: number) => void | Promise<void>;
+  onDownloadItemAttachment?: (itemId: number, attachment: ProcurementItemAttachment) => void | Promise<void>;
+  onUploadItemAttachments?: (requestId: number, itemId: number, files: File[]) => void | Promise<unknown>;
+  onDeleteItemAttachment?: (requestId: number, itemId: number, attachmentId: number) => void | Promise<unknown>;
   footer?: React.ReactNode;
 }
 
@@ -178,6 +182,9 @@ interface ProcurementItemCardProps {
   onCommentDraftChange?: (itemId: number, value: string) => void;
   onAddComment?: (requestId: number, itemId: number) => void | Promise<void>;
   onDeleteComment?: (requestId: number, itemId: number, commentId: number) => void | Promise<void>;
+  onDownloadAttachment?: (itemId: number, attachment: ProcurementItemAttachment) => void | Promise<void>;
+  onUploadAttachments?: (requestId: number, itemId: number, files: File[]) => void | Promise<unknown>;
+  onDeleteAttachment?: (requestId: number, itemId: number, attachmentId: number) => void | Promise<unknown>;
 }
 
 function ProcurementItemCard({
@@ -204,6 +211,9 @@ function ProcurementItemCard({
   onCommentDraftChange,
   onAddComment,
   onDeleteComment,
+  onDownloadAttachment,
+  onUploadAttachments,
+  onDeleteAttachment,
 }: ProcurementItemCardProps) {
   const [draft, setDraft] = useState<ItemProcessingDraft>(() => normalizeItemDraft(item));
   const [processingOpen, setProcessingOpen] = useState(false);
@@ -214,6 +224,7 @@ function ProcurementItemCard({
   const links = Array.isArray(item.links) ? item.links.filter(Boolean) : [];
   const expectedDeliveryDates = toDateRows(item.expected_delivery_dates);
   const commentsTotal = item.comments_count ?? comments.length;
+  const attachments = item.attachments || [];
   const requestedQuantity = Math.max(0, Math.trunc(toNumber(item.quantity)));
   const orderedQuantity = effectiveOrderedQuantity(item, requestedQuantity);
   const receivedQuantity = effectiveReceivedQuantity(item, requestedQuantity);
@@ -452,6 +463,65 @@ function ProcurementItemCard({
         </div>
       ) : null}
 
+      {attachments.length > 0 || (canEditItemProcessing && onUploadAttachments) ? (
+        <div className="mt-3">
+          <div className="mb-1 flex items-center justify-between gap-2">
+            <p className="app-text-muted text-[11px] font-medium">Файлы</p>
+            {canEditItemProcessing && onUploadAttachments ? (
+              <label className="app-action-ghost inline-flex cursor-pointer items-center gap-1 rounded-lg px-2 py-1 text-[11px] font-medium">
+                <Plus size={11} /> Добавить
+                <input
+                  type="file"
+                  multiple
+                  className="hidden"
+                  onChange={(event) => {
+                    const files = Array.from(event.target.files || []);
+                    if (files.length > 0) {
+                      void onUploadAttachments(requestId, item.id, files);
+                    }
+                    event.target.value = "";
+                  }}
+                />
+              </label>
+            ) : null}
+          </div>
+          {attachments.length > 0 ? (
+            <div className="flex flex-wrap gap-1.5">
+              {attachments.map((attachment) => (
+                <span
+                  key={attachment.id}
+                  className="app-badge inline-flex max-w-full items-center gap-1 rounded-full px-2 py-1 text-[11px]"
+                >
+                  <button
+                    type="button"
+                    onClick={() => void onDownloadAttachment?.(item.id, attachment)}
+                    className="inline-flex min-w-0 items-center gap-1"
+                    title={`Скачать ${attachment.file_name}`}
+                  >
+                    <Paperclip size={11} className="shrink-0" />
+                    <span className="max-w-48 truncate">{attachment.file_name}</span>
+                    <Download size={10} className="shrink-0" />
+                  </button>
+                  {canEditItemProcessing && onDeleteAttachment ? (
+                    <button
+                      type="button"
+                      title="Удалить файл"
+                      disabled={busyKey === `item-attachment-delete-${attachment.id}`}
+                      onClick={() => void onDeleteAttachment(requestId, item.id, attachment.id)}
+                      className="app-action-ghost inline-flex h-5 w-5 shrink-0 items-center justify-center rounded-full disabled:opacity-60"
+                    >
+                      <Trash2 size={10} />
+                    </button>
+                  ) : null}
+                </span>
+              ))}
+            </div>
+          ) : (
+            <p className="app-text-muted text-[11px]">Файлы не прикреплены</p>
+          )}
+        </div>
+      ) : null}
+
       <div className="mt-3 flex flex-wrap items-center gap-2">
         <div>
           <button
@@ -926,6 +996,9 @@ export function ProcurementRequestDetailContent({
   onItemCommentDraftChange,
   onAddItemComment,
   onDeleteItemComment,
+  onDownloadItemAttachment,
+  onUploadItemAttachments,
+  onDeleteItemAttachment,
   footer,
 }: ProcurementRequestDetailContentProps) {
   const canEditItemProcessing = Boolean(canProcessItems && onUpdateItem);
@@ -969,7 +1042,11 @@ export function ProcurementRequestDetailContent({
         <p className="app-text-wrap mt-2 whitespace-pre-line text-sm leading-6 text-[var(--foreground)]">
           {request.description || "—"}
         </p>
-        <div className="mt-3 grid gap-2 text-xs sm:grid-cols-3">
+        <div className="mt-3 grid gap-2 text-xs sm:grid-cols-2 lg:grid-cols-4">
+          <div className="app-surface-muted rounded-lg px-3 py-2">
+            <p className="app-text-muted text-[11px] uppercase tracking-wide">Создана</p>
+            <p className="mt-1 font-medium text-[var(--foreground)]">{formatDate(request.created_at) || "—"}</p>
+          </div>
           <div className="app-surface-muted rounded-lg px-3 py-2">
             <p className="app-text-muted text-[11px] uppercase tracking-wide">Отправлена</p>
             <p className="mt-1 font-medium text-[var(--foreground)]">{formatDate(request.submitted_at) || "—"}</p>
@@ -1040,6 +1117,9 @@ export function ProcurementRequestDetailContent({
                 onCommentDraftChange={onItemCommentDraftChange}
                 onAddComment={onAddItemComment}
                 onDeleteComment={onDeleteItemComment}
+                onDownloadAttachment={onDownloadItemAttachment}
+                onUploadAttachments={onUploadItemAttachments}
+                onDeleteAttachment={onDeleteItemAttachment}
               />
             ))}
           </div>
@@ -1102,6 +1182,8 @@ export function ProcurementRequestDetailContent({
         </div>
       ) : null}
 
+      <ProcurementRequestHistory request={request} displayUserName={displayUserName} />
+
       {footer}
     </div>
   );
diff --git a/frontend/src/components/procurement/ProcurementRequestHistory.tsx b/frontend/src/components/procurement/ProcurementRequestHistory.tsx
new file mode 100644
index 00000000..65d22eef
--- /dev/null
+++ b/frontend/src/components/procurement/ProcurementRequestHistory.tsx
@@ -0,0 +1,181 @@
+"use client";
+
+import { useCallback, useEffect, useState } from "react";
+import { ChevronRight, History, Loader2 } from "lucide-react";
+
+import { apiClient } from "@/lib/api";
+import { formatDateTime } from "@/lib/shared";
+import type { ProcurementRequest, ProcurementRequestActivity, User } from "@/types/api";
+
+interface ProcurementRequestHistoryProps {
+  request: ProcurementRequest;
+  displayUserName: (
+    person?: User | number | null,
+    fallbackName?: string | null,
+    fallbackEmail?: string | null,
+  ) => string;
+}
+
+const fieldLabels: Record<string, string> = {
+  title: "название",
+  description: "описание",
+  department_id: "отдел-заказчик",
+  processing_department_id: "отдел-исполнитель",
+  urgency: "срочность",
+  actual_cost: "фактическую стоимость",
+  execution_status: "статус исполнения",
+  ordered_quantity: "заказанное количество",
+  received_quantity: "полученное количество",
+  expected_delivery_dates: "ожидаемые даты",
+  actual_unit_price: "фактическую цену",
+  executor_comment: "комментарий исполнителя",
+  links: "ссылки",
+};
+
+function textMetadata(metadata: Record<string, unknown>, key: string): string {
+  return typeof metadata[key] === "string" ? String(metadata[key]) : "";
+}
+
+function getActivityDetail(activity: ProcurementRequestActivity): string {
+  const metadata = activity.metadata || {};
+  if (activity.action === "updated" || activity.action === "item_updated") {
+    const fields = Array.isArray(metadata.fields) ? metadata.fields : [];
+    const labels = fields.map((field) => fieldLabels[String(field)] || String(field));
+    const itemName = textMetadata(metadata, "item_name");
+    const prefix = itemName ? `${itemName}. ` : "";
+    return labels.length > 0 ? `${prefix}Изменено: ${labels.join(", ")}` : itemName;
+  }
+  if (activity.action === "executor_reassigned") {
+    const previous = textMetadata(metadata, "previous_executor");
+    const next = textMetadata(metadata, "new_executor");
+    return previous && next ? `${previous} -> ${next}` : next;
+  }
+  if (activity.action === "stage_approved" || activity.action === "stage_rejected") {
+    const step = textMetadata(metadata, "step_name");
+    const comment = textMetadata(metadata, "comment");
+    return [step, comment].filter(Boolean).join(". ");
+  }
+  if (activity.action === "attachment_added" || activity.action === "attachment_removed") {
+    const fileName = textMetadata(metadata, "file_name");
+    const itemName = textMetadata(metadata, "item_name");
+    return [itemName, fileName].filter(Boolean).join(": ");
+  }
+  if (activity.action === "comment_added" || activity.action === "comment_removed") {
+    const itemName = textMetadata(metadata, "item_name");
+    const comment = textMetadata(metadata, "comment_text");
+    return [itemName, comment].filter(Boolean).join(": ");
+  }
+  if (activity.action === "cancelled") {
+    return textMetadata(metadata, "reason");
+  }
+  return "";
+}
+
+function ActivityCard({
+  activity,
+  displayUserName,
+}: {
+  activity: ProcurementRequestActivity;
+  displayUserName: ProcurementRequestHistoryProps["displayUserName"];
+}) {
+  const detail = getActivityDetail(activity);
+  return (
+    <article className="app-surface-muted rounded-xl border border-[var(--border-subtle)] px-3 py-2.5">
+      <div className="flex items-start gap-3">
+        <span className="app-selected mt-0.5 flex h-7 w-7 shrink-0 items-center justify-center rounded-lg">
+          <History size={14} />
+        </span>
+        <div className="min-w-0 flex-1">
+          <div className="flex flex-wrap items-center gap-x-2 gap-y-1">
+            <p className="text-sm font-semibold text-[var(--foreground)]">
+              {activity.action_display || activity.action}
+            </p>
+            <span className="app-text-muted text-xs">{formatDateTime(activity.created_at)}</span>
+          </div>
+          <p className="app-text-muted mt-0.5 text-xs">
+            {activity.actor ? displayUserName(activity.actor) : "Система"}
+          </p>
+          {detail ? (
+            <p className="app-text-wrap mt-2 whitespace-pre-wrap text-xs text-[var(--foreground)]">
+              {detail}
+            </p>
+          ) : null}
+        </div>
+      </div>
+    </article>
+  );
+}
+
+export function ProcurementRequestHistory({ request, displayUserName }: ProcurementRequestHistoryProps) {
+  const [open, setOpen] = useState(false);
+  const [activities, setActivities] = useState<ProcurementRequestActivity[]>([]);
+  const [loading, setLoading] = useState(false);
+  const [loaded, setLoaded] = useState(false);
+  const [error, setError] = useState("");
+
+  const loadActivity = useCallback(async () => {
+    setLoading(true);
+    setError("");
+    try {
+      const result = await apiClient.getProcurementRequestActivity(request.id);
+      setActivities(Array.isArray(result) ? result : []);
+      setLoaded(true);
+    } catch (loadError) {
+      setError(loadError instanceof Error ? loadError.message : "Не удалось загрузить историю");
+    } finally {
+      setLoading(false);
+    }
+  }, [request.id]);
+
+  useEffect(() => {
+    if (open) void loadActivity();
+  }, [open, request.updated_at, loadActivity]);
+
+  const toggle = () => {
+    setOpen((current) => !current);
+  };
+  const count = loaded ? activities.length : request.activity_count || 0;
+
+  return (
+    <div className="rounded-xl border border-[var(--border-subtle)]">
+      <button
+        type="button"
+        onClick={toggle}
+        className="flex w-full items-center justify-between gap-3 px-3 py-2.5 text-left"
+        aria-expanded={open}
+      >
+        <span className="flex min-w-0 items-center gap-2">
+          <History size={15} className="app-text-muted shrink-0" />
+          <span className="text-sm font-medium text-[var(--foreground)]">История</span>
+          {count > 0 ? (
+            <span className="app-badge rounded-full px-2 py-0.5 text-[11px]">{count}</span>
+          ) : null}
+        </span>
+        <ChevronRight
+          size={16}
+          className={`app-text-muted shrink-0 transition-transform ${open ? "rotate-90" : ""}`}
+        />
+      </button>
+
+      {open ? (
+        <div className="space-y-2 border-t border-[var(--border-subtle)] p-3">
+          {loading && !loaded ? (
+            <div className="app-surface-muted rounded-xl border border-[var(--border-subtle)] p-4 text-center">
+              <Loader2 size={18} className="mx-auto animate-spin text-sky-500" />
+            </div>
+          ) : error ? (
+            <div className="app-feedback-danger rounded-xl px-3 py-3 text-xs">{error}</div>
+          ) : activities.length > 0 ? (
+            activities.map((activity) => (
+              <ActivityCard key={activity.id} activity={activity} displayUserName={displayUserName} />
+            ))
+          ) : (
+            <div className="app-surface-muted rounded-xl border border-dashed border-[var(--border-subtle)] px-3 py-4 text-center">
+              <p className="app-text-muted text-xs">Истории действий пока нет</p>
+            </div>
+          )}
+        </div>
+      ) : null}
+    </div>
+  );
+}
diff --git a/frontend/src/components/requests/RequestListItem.tsx b/frontend/src/components/requests/RequestListItem.tsx
index af5c70c7..d325a5a7 100644
--- a/frontend/src/components/requests/RequestListItem.tsx
+++ b/frontend/src/components/requests/RequestListItem.tsx
@@ -143,52 +143,34 @@ export function RequestListItem({
           </div>
 
           <div className="min-w-0 flex-1">
-            <div className="flex items-start justify-between gap-3">
-              <div className="min-w-0 flex-1">
-                <div className="mb-2 flex items-center gap-2">
-                  {authorLink ? (
-                    <Link href={authorLink} className="group flex min-w-0 items-center gap-2">
-                      <RequestAvatar
-                        alt={authorName}
-                        fallback={authorFallback}
-                        size="lg"
-                        src={requestAuthor?.avatar}
-                      />
-                      <span className="truncate text-sm font-medium text-[var(--foreground)] group-hover:text-[var(--accent-primary-strong)]">
-                        {authorName}
-                      </span>
-                    </Link>
-                  ) : (
-                    <div className="flex min-w-0 items-center gap-2">
-                      <RequestAvatar
-                        alt={authorName}
-                        fallback={authorFallback}
-                        size="lg"
-                      />
-                      <span className="truncate text-sm font-medium text-[var(--foreground)]">{authorName}</span>
-                    </div>
-                  )}
-                </div>
-
-                <button type="button" onClick={() => onOpenDetails(request)} className="block w-full text-left">
-                  <h3
-                    className={`${rowOpen ? "app-text-wrap line-clamp-3" : "truncate"} text-sm font-semibold text-[var(--foreground)] transition hover:text-[var(--accent-primary-strong)]`}
-                  >
-                    <span className="app-text-muted">{typeLabel}:</span>{" "}
-                    <span className="text-[var(--foreground)]">{title}</span>
-                  </h3>
-                </button>
-
-                <div className="app-text-muted mt-1 flex flex-wrap items-center gap-x-3 gap-y-1 text-xs">
-                  <span>
-                    Период: {request.date_from ? formatDate(request.date_from) : "—"}
-                    {request.date_to ? ` — ${formatDate(request.date_to)}` : ""}
-                  </span>
-                </div>
+            <div className="mb-2 flex min-w-0 flex-wrap items-start gap-2">
+              <div className="min-w-0 flex-[1_1_9rem]">
+                {authorLink ? (
+                  <Link href={authorLink} className="group flex min-w-0 max-w-full items-center gap-2">
+                    <RequestAvatar
+                      alt={authorName}
+                      fallback={authorFallback}
+                      size="lg"
+                      src={requestAuthor?.avatar}
+                    />
+                    <span className="app-text-wrap line-clamp-2 min-w-0 text-sm font-medium text-[var(--foreground)] group-hover:text-[var(--accent-primary-strong)]">
+                      {authorName}
+                    </span>
+                  </Link>
+                ) : (
+                  <div className="flex min-w-0 max-w-full items-center gap-2">
+                    <RequestAvatar
+                      alt={authorName}
+                      fallback={authorFallback}
+                      size="lg"
+                    />
+                    <span className="app-text-wrap line-clamp-2 min-w-0 text-sm font-medium text-[var(--foreground)]">{authorName}</span>
+                  </div>
+                )}
               </div>
 
-              <div className="shrink-0">
-                <div ref={isMenuOpen ? menuRef : null} className="flex items-center justify-end gap-2">
+              <div className="ml-auto shrink-0">
+                <div ref={isMenuOpen ? menuRef : null} className="flex max-w-full items-center justify-end gap-2">
                   <span className={`app-status-pill ${status.className}`}>
                     {status.label}
                   </span>
@@ -270,6 +252,22 @@ export function RequestListItem({
               </div>
             </div>
 
+            <button type="button" onClick={() => onOpenDetails(request)} className="block w-full text-left">
+              <h3
+                className={`app-text-wrap ${rowOpen ? "line-clamp-4" : "line-clamp-2"} text-sm font-semibold text-[var(--foreground)] transition hover:text-[var(--accent-primary-strong)]`}
+              >
+                <span className="app-text-muted">{typeLabel}:</span>{" "}
+                <span className="text-[var(--foreground)]">{title}</span>
+              </h3>
+            </button>
+
+            <div className="app-text-muted app-text-wrap mt-1 flex flex-wrap items-center gap-x-3 gap-y-1 text-xs">
+              <span>
+                Период: {request.date_from ? formatDate(request.date_from) : "—"}
+                {request.date_to ? ` — ${formatDate(request.date_to)}` : ""}
+              </span>
+            </div>
+
             {summary ? (
               <p
                 className={`${rowOpen ? "app-text-wrap line-clamp-10" : "app-text-wrap line-clamp-3"} mt-3 text-sm text-[var(--foreground)]`}
diff --git a/frontend/src/components/ui/Modal.tsx b/frontend/src/components/ui/Modal.tsx
index d53253ae..2720c093 100644
--- a/frontend/src/components/ui/Modal.tsx
+++ b/frontend/src/components/ui/Modal.tsx
@@ -1,9 +1,10 @@
 "use client";
 
-import { useEffect, useRef, type ReactNode } from "react";
+import { useEffect, useId, useRef, type ReactNode } from "react";
 import { X } from "lucide-react";
 
 let openModalCount = 0;
+const openModalStack: string[] = [];
 
 export interface ModalProps {
   isOpen: boolean;
@@ -20,6 +21,8 @@ export interface ModalProps {
   noPadding?: boolean;
   /** Hide the built-in header (caller manages its own header inside children) */
   noHeader?: boolean;
+  /** Visual level for a modal opened above another modal */
+  stackLevel?: number;
 }
 
 export function Modal({
@@ -35,36 +38,41 @@ export function Modal({
   className = "",
   noPadding = false,
   noHeader = false,
+  stackLevel = 0,
 }: ModalProps) {
   const modalRef = useRef<HTMLDivElement>(null);
   const contentRef = useRef<HTMLDivElement>(null);
+  const titleId = useId();
 
   useEffect(() => {
     if (!isOpen) return;
 
     openModalCount += 1;
+    openModalStack.push(titleId);
     document.body.style.overflow = "hidden";
 
     return () => {
       openModalCount = Math.max(0, openModalCount - 1);
+      const stackIndex = openModalStack.lastIndexOf(titleId);
+      if (stackIndex >= 0) openModalStack.splice(stackIndex, 1);
       if (openModalCount === 0) {
         document.body.style.overflow = "";
       }
     };
-  }, [isOpen]);
+  }, [isOpen, titleId]);
 
   useEffect(() => {
     if (!isOpen || !closeOnEsc) return;
 
     const handleEsc = (e: KeyboardEvent) => {
-      if (e.key === "Escape") {
+      if (e.key === "Escape" && openModalStack.at(-1) === titleId) {
         onClose();
       }
     };
 
     document.addEventListener("keydown", handleEsc);
     return () => document.removeEventListener("keydown", handleEsc);
-  }, [isOpen, closeOnEsc, onClose]);
+  }, [isOpen, closeOnEsc, onClose, titleId]);
 
   useEffect(() => {
     if (!isOpen || !contentRef.current) return;
@@ -81,7 +89,7 @@ export function Modal({
     firstElement?.focus();
 
     const handleTab = (e: KeyboardEvent) => {
-      if (e.key !== "Tab") return;
+      if (e.key !== "Tab" || openModalStack.at(-1) !== titleId) return;
 
       if (e.shiftKey) {
         if (document.activeElement === firstElement) {
@@ -98,12 +106,16 @@ export function Modal({
 
     document.addEventListener("keydown", handleTab);
     return () => document.removeEventListener("keydown", handleTab);
-  }, [isOpen]);
+  }, [isOpen, titleId]);
 
   if (!isOpen) return null;
 
   const handleBackdropClick = (e: React.MouseEvent) => {
-    if (closeOnClickOutside && e.target === modalRef.current) {
+    if (
+      closeOnClickOutside &&
+      e.target === modalRef.current &&
+      openModalStack.at(-1) === titleId
+    ) {
       onClose();
     }
   };
@@ -126,9 +138,10 @@ export function Modal({
       onClick={handleBackdropClick}
       data-overlay-root="true"
       className="app-overlay fixed inset-0 z-[100] flex items-center justify-center p-2 transition-opacity duration-200 opacity-100 sm:p-4"
+      style={{ zIndex: 100 + stackLevel }}
       role="dialog"
       aria-modal="true"
-      aria-labelledby={title ? "modal-title" : undefined}
+      aria-labelledby={title ? titleId : undefined}
     >
       <div
         ref={contentRef}
@@ -139,7 +152,7 @@ export function Modal({
           <div className="mb-3 flex shrink-0 items-center gap-2 px-4 pt-4 sm:mb-4 sm:gap-3 sm:px-6 sm:pt-6">
             {title && (
               <h3
-                id="modal-title"
+                id={titleId}
                 className="min-w-0 flex-1 truncate text-sm font-semibold text-[var(--foreground)] sm:text-base lg:text-lg"
                 title={title}
               >
diff --git a/frontend/src/contexts/NotificationsContext.tsx b/frontend/src/contexts/NotificationsContext.tsx
index 17e9620b..5fb3cfbc 100644
--- a/frontend/src/contexts/NotificationsContext.tsx
+++ b/frontend/src/contexts/NotificationsContext.tsx
@@ -4,6 +4,7 @@ import React, { createContext, useContext, useEffect, useState, useCallback, use
 import apiClient from '@/lib/api';
 import wsManager from '@/lib/websocketManager';
 import { getVerbCategory } from '@/lib/verbTranslations';
+import { useUser } from '@/contexts/UserContext';
 
 const NOTIFICATIONS_SYNC_INTERVAL_MS = 30000;
 const UNREAD_NOTIFICATIONS_PAGE_SIZE = 50;
@@ -52,6 +53,8 @@ interface NotificationsContextType {
 const NotificationsContext = createContext<NotificationsContextType | undefined>(undefined);
 
 export function NotificationsProvider({ children }: { children: React.ReactNode }) {
+  const { user } = useUser();
+  const authenticatedUserId = user?.id ?? null;
   const [notifications, setNotifications] = useState<NotificationItem[]>([]);
   const [loading, setLoading] = useState(true);
   const [error, setError] = useState<Error | null>(null);
@@ -63,6 +66,7 @@ export function NotificationsProvider({ children }: { children: React.ReactNode
   );
   const fetchInFlightRef = useRef<Promise<void> | null>(null);
   const summaryInFlightRef = useRef<Promise<void> | null>(null);
+  const knownNotificationIdsRef = useRef<Set<number>>(new Set());
 
   const applyUnreadSummary = useCallback((summary: {
     total?: number;
@@ -114,6 +118,11 @@ export function NotificationsProvider({ children }: { children: React.ReactNode
         });
         const notifs = data.notifications || data.results || data;
         const notificationsArray = Array.isArray(notifs) ? notifs : [];
+        notificationsArray.forEach((notification) => {
+          if (typeof notification.id === 'number') {
+            knownNotificationIdsRef.current.add(notification.id);
+          }
+        });
         setNotifications(notificationsArray);
         setUnreadCount(data.unread_count ?? notificationsArray.length);
         setError(null);
@@ -157,13 +166,24 @@ export function NotificationsProvider({ children }: { children: React.ReactNode
 
   // Загрузка начальных данных
   useEffect(() => {
+    if (!authenticatedUserId) {
+      setNotifications([]);
+      setUnreadCount(0);
+      setUnreadCategoryCounts({});
+      setUnreadProcurementRequestCounts({});
+      knownNotificationIdsRef.current.clear();
+      setError(null);
+      setLoading(false);
+      return;
+    }
+
     void syncUnreadNotifications(true);
     void syncUnreadSummary();
-  }, [syncUnreadNotifications, syncUnreadSummary]);
+  }, [authenticatedUserId, syncUnreadNotifications, syncUnreadSummary]);
 
   // ЕДИНСТВЕННЫЙ WebSocket через singleton manager
   useEffect(() => {
-    if (typeof window === 'undefined' || !localStorage.getItem('access_token')) {
+    if (!authenticatedUserId || typeof window === 'undefined' || !localStorage.getItem('access_token')) {
       console.log('[NotificationsContext] WebSocket disabled: not in browser or not authenticated');
       return;
     }
@@ -178,12 +198,13 @@ export function NotificationsProvider({ children }: { children: React.ReactNode
       const incomingNotification = data.notification;
 
       if (data.type === 'notification' && incomingNotification) {
-        setNotifications(prev => {
-          if (prev.some(n => n.id === incomingNotification.id)) {
-            return prev;
-          }
-          return [incomingNotification, ...prev];
-        });
+        if (knownNotificationIdsRef.current.has(incomingNotification.id)) {
+          void syncUnreadSummary();
+          return;
+        }
+
+        knownNotificationIdsRef.current.add(incomingNotification.id);
+        setNotifications(prev => [incomingNotification, ...prev]);
 
         const isRead = incomingNotification.is_read ?? !incomingNotification.unread;
         if (!isRead) {
@@ -205,6 +226,7 @@ export function NotificationsProvider({ children }: { children: React.ReactNode
             }
           }
         }
+        void syncUnreadSummary();
         return;
       }
 
@@ -251,11 +273,11 @@ export function NotificationsProvider({ children }: { children: React.ReactNode
       unsubscribeMessages();
       unsubscribeStatus();
     };
-  }, [syncUnreadNotifications, syncUnreadSummary]);
+  }, [authenticatedUserId, syncUnreadNotifications, syncUnreadSummary]);
 
   // Регулярная сверка с API нужна даже при живом WebSocket: часть событий может не дойти по сокету.
   useEffect(() => {
-    if (typeof window === 'undefined' || !localStorage.getItem('access_token')) {
+    if (!authenticatedUserId || typeof window === 'undefined' || !localStorage.getItem('access_token')) {
       return;
     }
 
@@ -282,16 +304,16 @@ export function NotificationsProvider({ children }: { children: React.ReactNode
       window.removeEventListener('focus', handleFocus);
       document.removeEventListener('visibilitychange', handleVisibilityChange);
     };
-  }, [syncUnreadNotifications, syncUnreadSummary]);
+  }, [authenticatedUserId, syncUnreadNotifications, syncUnreadSummary]);
 
   useEffect(() => {
-    if (!isWsConnected) {
+    if (!authenticatedUserId || !isWsConnected) {
       return;
     }
 
     void syncUnreadSummary();
     void syncUnreadNotifications(false);
-  }, [isWsConnected, syncUnreadNotifications, syncUnreadSummary]);
+  }, [authenticatedUserId, isWsConnected, syncUnreadNotifications, syncUnreadSummary]);
 
   const markAsRead = useCallback(async (id: number) => {
     await apiClient.markNotificationAsRead(id);
diff --git a/frontend/src/hooks/useProcurementPage.ts b/frontend/src/hooks/useProcurementPage.ts
index 5a7231b7..379c46f9 100644
--- a/frontend/src/hooks/useProcurementPage.ts
+++ b/frontend/src/hooks/useProcurementPage.ts
@@ -12,6 +12,7 @@ import type {
   ProcurementApprovalStepSelection,
   ProcurementComment,
   ProcurementItem,
+  ProcurementItemAttachment,
   ProcurementItemComment,
   ProcurementRequest,
   ProcurementStatus,
@@ -29,6 +30,9 @@ type ItemDraft = {
   supplier_info: string;
   links: string[];
   initial_comment: string;
+  attachments: ProcurementItemAttachment[];
+  pending_files: File[];
+  removed_attachment_ids: number[];
 };
 
 const emptyItem: ItemDraft = {
@@ -40,6 +44,9 @@ const emptyItem: ItemDraft = {
   supplier_info: "",
   links: [],
   initial_comment: "",
+  attachments: [],
+  pending_files: [],
+  removed_attachment_ids: [],
 };
 
 type FormState = {
@@ -575,6 +582,9 @@ export function useProcurementPage(user: User | null) {
             supplier_info: item.supplier_info || "",
             links: toLinkRows(item.links),
             initial_comment: "",
+            attachments: item.attachments || [],
+            pending_files: [],
+            removed_attachment_ids: [],
           }))
         : [{ ...emptyItem }],
     });
@@ -714,9 +724,10 @@ export function useProcurementPage(user: User | null) {
         })),
       };
 
+      let savedRequest: ProcurementRequest;
       if (modalMode === "create") {
-        await apiClient.createProcurementRequest(payload) as ProcurementRequest;
-        toast.success("Заявка создана и направлена в отдел.");
+        const created = await apiClient.createProcurementRequest(payload) as ProcurementRequest;
+        savedRequest = await apiClient.getProcurementRequest(created.id) as ProcurementRequest;
         setCreateOpen(false);
       } else if (editingId) {
         await apiClient.updateProcurementRequest(editingId, {
@@ -726,10 +737,43 @@ export function useProcurementPage(user: User | null) {
           processing_department: payload.processing_department,
           items: payload.items,
         });
-        toast.success("Заявка обновлена.");
+        savedRequest = await apiClient.getProcurementRequest(editingId) as ProcurementRequest;
         setEditingId(null);
+      } else {
+        return;
       }
 
+      const existingIds = new Set(
+        validItems
+          .map((item) => item.id)
+          .filter((id): id is number => typeof id === "number"),
+      );
+      const createdItems = (savedRequest.items || []).filter((item) => !existingIds.has(item.id));
+      let createdItemIndex = 0;
+
+      for (const item of validItems) {
+        const itemId = item.id ?? createdItems[createdItemIndex++]?.id;
+        if (!itemId) continue;
+
+        if (item.removed_attachment_ids.length > 0) {
+          await Promise.all(
+            item.removed_attachment_ids.map((attachmentId) => (
+              apiClient.deleteProcurementItemAttachment(itemId, attachmentId)
+            )),
+          );
+        }
+        if (item.pending_files.length > 0) {
+          await apiClient.uploadProcurementItemAttachments(itemId, item.pending_files);
+        }
+      }
+
+      await refreshOne(savedRequest.id);
+      toast.success(
+        modalMode === "create"
+          ? "Заявка создана и направлена в отдел."
+          : "Заявка обновлена.",
+      );
+
       resetForm();
       await refreshCurrentView();
       if (editingId) {
@@ -740,7 +784,7 @@ export function useProcurementPage(user: User | null) {
     } finally {
       setBusyKey(null);
     }
-  }, [editingId, form, markRequestNotificationsRead, modalMode, refreshCurrentView, resetForm]);
+  }, [editingId, form, markRequestNotificationsRead, modalMode, refreshCurrentView, refreshOne, resetForm]);
 
   const handleSave = useCallback(() => saveRequest(), [saveRequest]);
 
@@ -1205,6 +1249,64 @@ export function useProcurementPage(user: User | null) {
     }));
   }, []);
 
+  const handleDownloadItemAttachment = useCallback(async (
+    itemId: number,
+    attachment: ProcurementItemAttachment,
+  ) => {
+    try {
+      const { blob, filename } = await apiClient.downloadProcurementItemAttachment(itemId, attachment);
+      const url = URL.createObjectURL(blob);
+      const anchor = document.createElement("a");
+      anchor.href = url;
+      anchor.download = filename;
+      document.body.appendChild(anchor);
+      anchor.click();
+      anchor.remove();
+      URL.revokeObjectURL(url);
+    } catch (downloadError) {
+      setActionError(getReadableError(downloadError, "Не удалось скачать файл"));
+    }
+  }, []);
+
+  const handleUploadItemAttachments = useCallback(async (
+    requestId: number,
+    itemId: number,
+    files: File[],
+  ) => {
+    if (files.length === 0) return false;
+    try {
+      setBusyKey(`item-attachments-${itemId}`);
+      await apiClient.uploadProcurementItemAttachments(itemId, files);
+      await refreshOne(requestId);
+      toast.success(files.length > 1 ? "Файлы добавлены." : "Файл добавлен.");
+      return true;
+    } catch (uploadError) {
+      setActionError(getReadableError(uploadError, "Не удалось добавить файл"));
+      return false;
+    } finally {
+      setBusyKey(null);
+    }
+  }, [refreshOne]);
+
+  const handleDeleteItemAttachment = useCallback(async (
+    requestId: number,
+    itemId: number,
+    attachmentId: number,
+  ) => {
+    try {
+      setBusyKey(`item-attachment-delete-${attachmentId}`);
+      await apiClient.deleteProcurementItemAttachment(itemId, attachmentId);
+      await refreshOne(requestId);
+      toast.success("Файл удалён.");
+      return true;
+    } catch (deleteError) {
+      setActionError(getReadableError(deleteError, "Не удалось удалить файл"));
+      return false;
+    } finally {
+      setBusyKey(null);
+    }
+  }, [refreshOne]);
+
   const activeFilterCount = [
     statusFilter.length > 0,
     urgencyFilter,
@@ -1315,6 +1417,9 @@ export function useProcurementPage(user: User | null) {
     addItemRow,
     removeItemRow,
     updateItemRow,
+    handleDownloadItemAttachment,
+    handleUploadItemAttachments,
+    handleDeleteItemAttachment,
     activeFilterCount,
     isFinal,
     resolveUserId,
diff --git a/frontend/src/hooks/useSettingsPage.ts b/frontend/src/hooks/useSettingsPage.ts
index 1c0cd865..b29e289f 100644
--- a/frontend/src/hooks/useSettingsPage.ts
+++ b/frontend/src/hooks/useSettingsPage.ts
@@ -388,11 +388,6 @@ export function useSettingsPage() {
       toast.error("Можно загрузить только изображение");
       return;
     }
-    if (file.size > 5 * 1024 * 1024) {
-      toast.error("Максимальный размер файла 5 МБ");
-      return;
-    }
-
     const reader = new FileReader();
     reader.onload = () => {
       if (typeof reader.result !== "string") {
diff --git a/frontend/src/hooks/useUserDetailPage.ts b/frontend/src/hooks/useUserDetailPage.ts
index 0780bcdd..e959aba9 100644
--- a/frontend/src/hooks/useUserDetailPage.ts
+++ b/frontend/src/hooks/useUserDetailPage.ts
@@ -255,11 +255,6 @@ export function useUserDetailPage(userId: number, currentUser: User | null) {
     const file = event.target.files?.[0];
     if (!file) return;
 
-    if (file.size > 5 * 1024 * 1024) {
-      alert("Файл слишком большой. Максимальный размер: 5MB");
-      return;
-    }
-
     if (!file.type.startsWith("image/")) {
       alert("Можно загружать только изображения");
       return;
diff --git a/frontend/src/lib/api/calendar.ts b/frontend/src/lib/api/calendar.ts
index da9007b7..385b7d1a 100644
--- a/frontend/src/lib/api/calendar.ts
+++ b/frontend/src/lib/api/calendar.ts
@@ -8,7 +8,7 @@ import type {
 } from '@/types/api';
 
 type CalendarScopeParam = { scope?: "all" };
-type CalendarQueryParams = { start?: string; end?: string; calendar?: number; scope?: "all" };
+type CalendarQueryParams = { start?: string; end?: string; calendar?: number; scope?: "all"; search?: string; page_size?: number };
 type CalendarListResponse = PaginatedResponse<Calendar> | Calendar[];
 type CalendarEventsResponse = PaginatedResponse<CalendarEvent> | CalendarEvent[];
 type CalendarRulesParams = Record<string, unknown>;
@@ -21,6 +21,8 @@ export function createCalendarApi(request: RequestFn, getToken: GetTokenFn) {
             if (params?.end) qp.append('end', params.end);
             if (params?.calendar) qp.append('calendar', params.calendar.toString());
             if (params?.scope) qp.append('scope', params.scope);
+            if (params?.search) qp.append('search', params.search);
+            if (params?.page_size) qp.append('page_size', params.page_size.toString());
             const qs = qp.toString();
             return request(`/api/v1/schedule/events/${qs ? '?' + qs : ''}`);
         },
diff --git a/frontend/src/lib/api/documents.ts b/frontend/src/lib/api/documents.ts
index fcf24991..297b9bf8 100644
--- a/frontend/src/lib/api/documents.ts
+++ b/frontend/src/lib/api/documents.ts
@@ -46,11 +46,12 @@ async function fetchDownload(
 
 export function createDocumentsApi(request: RequestFn, getToken?: GetTokenFn, requestRaw?: RawRequestFn) {
     return {
-        getDocuments: (params?: { search?: string; type?: string; status?: string; page?: number; page_size?: number; limit?: number; folder_id?: number; is_regulation?: boolean }) => {
+        getDocuments: (params?: { search?: string; type?: string; status?: string; scope?: string; page?: number; page_size?: number; limit?: number; folder_id?: number; is_regulation?: boolean }) => {
             const qp = new URLSearchParams();
             if (params?.search) qp.append('search', params.search);
             if (params?.type) qp.append('type', params.type);
             if (params?.status) qp.append('status', params.status);
+            if (params?.scope) qp.append('scope', params.scope);
             if (params?.page) qp.append('page', params.page.toString());
             const pageSize = params?.page_size ?? params?.limit;
             if (pageSize) qp.append('page_size', pageSize.toString());
@@ -60,7 +61,7 @@ export function createDocumentsApi(request: RequestFn, getToken?: GetTokenFn, re
             return request(`/api/v1/documents/${qs ? '?' + qs : ''}`);
         },
         getDocument: (id: number) => request(`/api/v1/documents/${id}/`),
-        createDocument: (data: { title?: string; description?: string; file?: File | Blob; extracted_text?: string; sent_to_all?: boolean; is_regulation?: boolean; recipient_ids?: number[]; department_ids?: number[]; folder_id?: number | null; acknowledgement_required?: boolean; tag_ids?: number[] }) => {
+        createDocument: (data: { title?: string; description?: string; file?: File | Blob; extracted_text?: string; sent_to_all?: boolean; is_regulation?: boolean; recipient_ids?: number[]; department_ids?: number[]; folder_id?: number | null; acknowledgement_required?: boolean; acknowledgement_for_all?: boolean; acknowledgement_recipient_ids?: number[]; acknowledgement_department_ids?: number[]; tag_ids?: number[] }) => {
             const fd = new FormData();
             if (data.title?.trim()) fd.append('title', data.title.trim());
             if (data.description) fd.append('description', data.description);
@@ -69,13 +70,16 @@ export function createDocumentsApi(request: RequestFn, getToken?: GetTokenFn, re
             fd.append('sent_to_all', String(data.sent_to_all ?? true));
             fd.append('is_regulation', String(data.is_regulation ?? false));
             if (data.acknowledgement_required !== undefined) fd.append('acknowledgement_required', String(data.acknowledgement_required));
-            data.recipient_ids?.forEach(id => fd.append('recipient_ids', String(id)));
-            data.department_ids?.forEach(id => fd.append('department_ids', String(id)));
+            if (data.acknowledgement_for_all !== undefined) fd.append('acknowledgement_for_all', String(data.acknowledgement_for_all));
+            if (data.recipient_ids !== undefined) fd.append('recipient_ids', JSON.stringify(data.recipient_ids));
+            if (data.department_ids !== undefined) fd.append('department_ids', JSON.stringify(data.department_ids));
+            if (data.acknowledgement_recipient_ids !== undefined) fd.append('acknowledgement_recipient_ids', JSON.stringify(data.acknowledgement_recipient_ids));
+            if (data.acknowledgement_department_ids !== undefined) fd.append('acknowledgement_department_ids', JSON.stringify(data.acknowledgement_department_ids));
             data.tag_ids?.forEach(id => fd.append('tag_ids', String(id)));
             if (data.file) fd.append('file', data.file);
             return request('/api/v1/documents/', { method: 'POST', body: fd });
         },
-        updateDocument: (id: number, data: { title?: string; description?: string; extracted_text?: string; file?: File; tag_ids?: number[]; folder?: number | null; is_regulation?: boolean; sent_to_all?: boolean; acknowledgement_required?: boolean; recipient_ids?: number[]; department_ids?: number[] }) => {
+        updateDocument: (id: number, data: { title?: string; description?: string; extracted_text?: string; file?: File; tag_ids?: number[]; folder?: number | null; is_regulation?: boolean; sent_to_all?: boolean; acknowledgement_required?: boolean; acknowledgement_for_all?: boolean; recipient_ids?: number[]; department_ids?: number[]; acknowledgement_recipient_ids?: number[]; acknowledgement_department_ids?: number[] }) => {
             const fd = new FormData();
             if (data.title !== undefined) fd.append('title', data.title);
             if (data.description !== undefined) fd.append('description', data.description);
@@ -85,8 +89,11 @@ export function createDocumentsApi(request: RequestFn, getToken?: GetTokenFn, re
             if (data.is_regulation !== undefined) fd.append('is_regulation', String(data.is_regulation));
             if (data.sent_to_all !== undefined) fd.append('sent_to_all', String(data.sent_to_all));
             if (data.acknowledgement_required !== undefined) fd.append('acknowledgement_required', String(data.acknowledgement_required));
-            data.department_ids?.forEach(departmentId => fd.append('department_ids', String(departmentId)));
-            data.recipient_ids?.forEach(recipientId => fd.append('recipient_ids', String(recipientId)));
+            if (data.acknowledgement_for_all !== undefined) fd.append('acknowledgement_for_all', String(data.acknowledgement_for_all));
+            if (data.department_ids !== undefined) fd.append('department_ids', JSON.stringify(data.department_ids));
+            if (data.recipient_ids !== undefined) fd.append('recipient_ids', JSON.stringify(data.recipient_ids));
+            if (data.acknowledgement_department_ids !== undefined) fd.append('acknowledgement_department_ids', JSON.stringify(data.acknowledgement_department_ids));
+            if (data.acknowledgement_recipient_ids !== undefined) fd.append('acknowledgement_recipient_ids', JSON.stringify(data.acknowledgement_recipient_ids));
             data.tag_ids?.forEach(tagId => fd.append('tag_ids', String(tagId)));
             return request(`/api/v1/documents/${id}/`, { method: 'PATCH', body: fd });
         },
@@ -138,11 +145,11 @@ export function createDocumentsApi(request: RequestFn, getToken?: GetTokenFn, re
         getFolderChildren: (id: number) => request(`/api/v1/folders/${id}/children/`),
         getFolderDocuments: (id: number) => request(`/api/v1/folders/${id}/documents/`),
         // Comments
-        getDocumentComments: (documentId: number) => request(`/api/v1/document-comments/?document=${documentId}`),
+        getDocumentComments: (documentId: number) => request(`/api/v1/documents/${documentId}/comments/`),
         createDocumentComment: (data: { document: number; text: string; parent?: number }) =>
-            request('/api/v1/document-comments/', { method: 'POST', body: JSON.stringify({ document_id: data.document, text: data.text, parent_id: data.parent }) }),
-        updateDocumentComment: (id: number, text: string) => request(`/api/v1/document-comments/${id}/`, { method: 'PATCH', body: JSON.stringify({ text }) }),
-        deleteDocumentComment: (id: number): Promise<void> => request(`/api/v1/document-comments/${id}/`, { method: 'DELETE' }),
+            request(`/api/v1/documents/${data.document}/comments/`, { method: 'POST', body: JSON.stringify({ text: data.text, parent_id: data.parent }) }),
+        updateDocumentComment: (documentId: number, id: number, text: string) => request(`/api/v1/documents/${documentId}/comments/${id}/`, { method: 'PATCH', body: JSON.stringify({ text }) }),
+        deleteDocumentComment: (documentId: number, id: number): Promise<void> => request(`/api/v1/documents/${documentId}/comments/${id}/`, { method: 'DELETE' }),
         getCommentReplies: (commentId: number) => request(`/api/v1/document-comments/${commentId}/replies/`),
         // Tags
         getDocumentTags: (params?: { page?: number; page_size?: number; limit?: number }) => {
diff --git a/frontend/src/lib/api/index.ts b/frontend/src/lib/api/index.ts
index e6210b22..c8f5ab0c 100644
--- a/frontend/src/lib/api/index.ts
+++ b/frontend/src/lib/api/index.ts
@@ -32,10 +32,10 @@ export const apiClient = Object.assign(base, {
     ...createFeedApi(req, tok),
     ...createRequestsApi(req, tok),
     ...createEquipmentApi(req, tok),
-    ...createProcurementApi(req),
+    ...createProcurementApi(req, raw),
     ...createAttendanceApi(req, tok),
     ...createGuestsApi(req),
-    ...createTasksApi(req),
+    ...createTasksApi(req, raw),
 });
 
 export default apiClient;
diff --git a/frontend/src/lib/api/procurement.ts b/frontend/src/lib/api/procurement.ts
index f0df1fc3..9d1e9d99 100644
--- a/frontend/src/lib/api/procurement.ts
+++ b/frontend/src/lib/api/procurement.ts
@@ -1,11 +1,22 @@
 /* eslint-disable @typescript-eslint/no-explicit-any */
-import type { ProcurementApprovalOptions, ProcurementApprovalStepSelection, ProcurementCreateOptions } from '@/types/api';
-import { buildQuery, type RequestFn } from './utils';
+import type { ProcurementApprovalOptions, ProcurementApprovalStepSelection, ProcurementCreateOptions, ProcurementItemAttachment, ProcurementRequestActivity } from '@/types/api';
+import { buildQuery, type RawRequestFn, type RequestFn } from './utils';
 
-export function createProcurementApi(request: RequestFn) {
+function parseDownloadFilename(response: Response, fallback: string): string {
+    const disposition = response.headers.get('content-disposition') || '';
+    const encodedMatch = disposition.match(/filename\*=UTF-8''([^;]+)/);
+    const plainMatch = disposition.match(/filename="?([^";]+)"?/);
+    return encodedMatch?.[1]
+        ? decodeURIComponent(encodedMatch[1])
+        : plainMatch?.[1] || fallback;
+}
+
+export function createProcurementApi(request: RequestFn, requestRaw: RawRequestFn) {
     return {
         getProcurementRequests: (params?: Record<string, string | number>) => request(`/api/v1/procurement/requests/${buildQuery(params)}`),
         getProcurementRequest: (id: number) => request(`/api/v1/procurement/requests/${id}/`),
+        getProcurementRequestActivity: (id: number): Promise<ProcurementRequestActivity[]> =>
+            request(`/api/v1/procurement/requests/${id}/activity/`),
         getProcurementRequestCreateOptions: (): Promise<ProcurementCreateOptions> => request('/api/v1/procurement/requests/create-options/'),
         createProcurementRequest: (data: Record<string, any>) => request('/api/v1/procurement/requests/', { method: 'POST', headers: { 'Content-Type': 'application/json' }, body: JSON.stringify(data) }),
         updateProcurementRequest: (id: number, data: Record<string, any>) => request(`/api/v1/procurement/requests/${id}/`, { method: 'PATCH', headers: { 'Content-Type': 'application/json' }, body: JSON.stringify(data) }),
@@ -63,6 +74,30 @@ export function createProcurementApi(request: RequestFn) {
             request(`/api/v1/procurement/items/${itemId}/comments/`, { method: 'POST', body: JSON.stringify({ text }) }),
         deleteProcurementItemComment: (itemId: number, commentId: number): Promise<void> =>
             request(`/api/v1/procurement/items/${itemId}/comments/${commentId}/`, { method: 'DELETE' }),
+        getProcurementItemAttachments: (itemId: number): Promise<ProcurementItemAttachment[]> =>
+            request(`/api/v1/procurement/items/${itemId}/attachments/`),
+        uploadProcurementItemAttachments: (itemId: number, files: File[]): Promise<ProcurementItemAttachment[]> => {
+            const formData = new FormData();
+            files.forEach((file) => formData.append('files', file));
+            return request(`/api/v1/procurement/items/${itemId}/attachments/`, {
+                method: 'POST',
+                body: formData,
+            });
+        },
+        downloadProcurementItemAttachment: async (
+            itemId: number,
+            attachment: ProcurementItemAttachment,
+        ): Promise<{ blob: Blob; filename: string }> => {
+            const response = await requestRaw(
+                attachment.download_url || `/api/v1/procurement/items/${itemId}/attachments/${attachment.id}/`,
+            );
+            return {
+                blob: await response.blob(),
+                filename: parseDownloadFilename(response, attachment.file_name),
+            };
+        },
+        deleteProcurementItemAttachment: (itemId: number, attachmentId: number): Promise<void> =>
+            request(`/api/v1/procurement/items/${itemId}/attachments/${attachmentId}/`, { method: 'DELETE' }),
         // Suppliers
         getProcurementSuppliers: (params?: Record<string, string | number>) => request(`/api/v1/procurement/suppliers/${buildQuery(params)}`),
         createProcurementSupplier: (data: Record<string, any>) => request('/api/v1/procurement/suppliers/', { method: 'POST', headers: { 'Content-Type': 'application/json' }, body: JSON.stringify(data) }),
diff --git a/frontend/src/lib/api/tasks.ts b/frontend/src/lib/api/tasks.ts
index 6ede6d63..73c10d9b 100644
--- a/frontend/src/lib/api/tasks.ts
+++ b/frontend/src/lib/api/tasks.ts
@@ -4,6 +4,8 @@ import type {
     TaskCard,
     TaskColumn,
     TaskActivity,
+    TaskAttachment,
+    TaskChecklistItem,
     TaskComment,
     TaskLabel,
     TaskLinkedAttendanceRecord,
@@ -16,10 +18,20 @@ import type {
     TaskLinkedPost,
     TaskLinkedProcurementRequest,
     TaskLinkedRequest,
+    TaskExternalLink,
 } from "@/types/api";
-import { buildQuery, type RequestFn } from "./utils";
+import { buildQuery, type RawRequestFn, type RequestFn } from "./utils";
 
-export function createTasksApi(request: RequestFn) {
+function parseDownloadFilename(response: Response, fallback: string): string {
+    const disposition = response.headers.get("content-disposition") || "";
+    const encodedMatch = disposition.match(/filename\*=UTF-8''([^;]+)/);
+    const plainMatch = disposition.match(/filename="?([^";]+)"?/);
+    return encodedMatch?.[1]
+        ? decodeURIComponent(encodedMatch[1])
+        : plainMatch?.[1] || fallback;
+}
+
+export function createTasksApi(request: RequestFn, requestRaw: RawRequestFn) {
     return {
         getTaskBoards: (params?: Record<string, string | number>) =>
             request(`/api/v1/tasks/boards/${buildQuery(params)}`),
@@ -69,8 +81,65 @@ export function createTasksApi(request: RequestFn) {
                 method: "POST",
                 body: JSON.stringify(data),
             }),
+        completeTask: (id: number): Promise<TaskCard> =>
+            request(`/api/v1/tasks/${id}/complete/`, {
+                method: "POST",
+            }),
+        claimTask: (id: number): Promise<TaskCard> =>
+            request(`/api/v1/tasks/${id}/claim/`, {
+                method: "POST",
+            }),
         getTaskActivity: (id: number): Promise<TaskActivity[]> =>
             request(`/api/v1/tasks/${id}/activity/`),
+        getTaskAttachments: (id: number): Promise<TaskAttachment[]> =>
+            request(`/api/v1/tasks/${id}/attachments/`),
+        uploadTaskAttachments: (id: number, files: File[]): Promise<TaskAttachment[]> => {
+            const formData = new FormData();
+            files.forEach((file) => formData.append("files", file));
+            return request(`/api/v1/tasks/${id}/attachments/`, {
+                method: "POST",
+                body: formData,
+            });
+        },
+        downloadTaskAttachment: async (
+            taskId: number,
+            attachment: TaskAttachment,
+        ): Promise<{ blob: Blob; filename: string }> => {
+            const response = await requestRaw(
+                attachment.download_url || `/api/v1/tasks/${taskId}/attachments/${attachment.id}/download/`,
+            );
+            return {
+                blob: await response.blob(),
+                filename: parseDownloadFilename(response, attachment.file_name),
+            };
+        },
+        deleteTaskAttachment: (taskId: number, attachmentId: number): Promise<void> =>
+            request(`/api/v1/tasks/${taskId}/attachments/${attachmentId}/`, {
+                method: "DELETE",
+            }),
+        getTaskChecklist: (id: number): Promise<TaskChecklistItem[]> =>
+            request(`/api/v1/tasks/${id}/checklist/`),
+        addTaskChecklistItem: (
+            id: number,
+            data: { title: string; position?: number; is_completed?: boolean },
+        ): Promise<TaskChecklistItem> =>
+            request(`/api/v1/tasks/${id}/checklist/`, {
+                method: "POST",
+                body: JSON.stringify(data),
+            }),
+        updateTaskChecklistItem: (
+            id: number,
+            itemId: number,
+            data: { title?: string; position?: number; is_completed?: boolean },
+        ): Promise<TaskChecklistItem> =>
+            request(`/api/v1/tasks/${id}/checklist/${itemId}/`, {
+                method: "PATCH",
+                body: JSON.stringify(data),
+            }),
+        deleteTaskChecklistItem: (id: number, itemId: number): Promise<void> =>
+            request(`/api/v1/tasks/${id}/checklist/${itemId}/`, {
+                method: "DELETE",
+            }),
         getTaskComments: (id: number): Promise<TaskComment[]> =>
             request(`/api/v1/tasks/${id}/comments/`),
         addTaskComment: (id: number, text: string): Promise<TaskComment> =>
@@ -78,6 +147,11 @@ export function createTasksApi(request: RequestFn) {
                 method: "POST",
                 body: JSON.stringify({ text }),
             }),
+        updateTaskComment: (id: number, commentId: number, text: string): Promise<TaskComment> =>
+            request(`/api/v1/tasks/${id}/comments/${commentId}/`, {
+                method: "PATCH",
+                body: JSON.stringify({ text }),
+            }),
         deleteTaskComment: (id: number, commentId: number): Promise<void> =>
             request(`/api/v1/tasks/${id}/comments/${commentId}/`, {
                 method: "DELETE",
@@ -210,6 +284,20 @@ export function createTasksApi(request: RequestFn) {
             request(`/api/v1/tasks/${id}/linked-events/${linkId}/`, {
                 method: "DELETE",
             }),
+        getTaskExternalLinks: (id: number): Promise<TaskExternalLink[]> =>
+            request(`/api/v1/tasks/${id}/external-links/`),
+        addTaskExternalLink: (
+            id: number,
+            data: { url: string; title?: string },
+        ): Promise<TaskExternalLink> =>
+            request(`/api/v1/tasks/${id}/external-links/`, {
+                method: "POST",
+                body: JSON.stringify(data),
+            }),
+        deleteTaskExternalLink: (id: number, linkId: number): Promise<void> =>
+            request(`/api/v1/tasks/${id}/external-links/${linkId}/`, {
+                method: "DELETE",
+            }),
         deleteTask: (id: number): Promise<void> =>
             request(`/api/v1/tasks/${id}/`, { method: "DELETE" }),
     };
diff --git a/frontend/src/lib/document-preview.test.js b/frontend/src/lib/document-preview.test.js
new file mode 100644
index 00000000..a06d605c
--- /dev/null
+++ b/frontend/src/lib/document-preview.test.js
@@ -0,0 +1,12 @@
+import test from "node:test";
+import assert from "node:assert/strict";
+
+import { canPreviewDocument, getDocumentFileExtension } from "./document-preview.ts";
+
+test("document preview capabilities stay consistent across document surfaces", () => {
+  assert.equal(getDocumentFileExtension("policy.final.PDF?download=1"), "pdf");
+  assert.equal(canPreviewDocument("policy.pdf"), true);
+  assert.equal(canPreviewDocument("instructions.docx"), true);
+  assert.equal(canPreviewDocument("README"), true);
+  assert.equal(canPreviewDocument("archive.zip"), false);
+});
diff --git a/frontend/src/lib/document-preview.ts b/frontend/src/lib/document-preview.ts
new file mode 100644
index 00000000..27b7f87e
--- /dev/null
+++ b/frontend/src/lib/document-preview.ts
@@ -0,0 +1,100 @@
+const DOCUMENT_PREVIEW_EXTENSIONS = new Set([
+  "pdf",
+  "jpg",
+  "jpeg",
+  "png",
+  "gif",
+  "webp",
+  "svg",
+  "bmp",
+  "ico",
+  "avif",
+  "docx",
+  "xls",
+  "xlsx",
+  "xlsm",
+  "xlsb",
+  "ods",
+  "csv",
+  "tsv",
+  "txt",
+  "text",
+  "md",
+  "markdown",
+  "json",
+  "xml",
+  "html",
+  "htm",
+  "css",
+  "scss",
+  "sass",
+  "less",
+  "js",
+  "jsx",
+  "ts",
+  "tsx",
+  "mjs",
+  "cjs",
+  "yml",
+  "yaml",
+  "ini",
+  "conf",
+  "cfg",
+  "log",
+  "sql",
+  "py",
+  "java",
+  "c",
+  "cpp",
+  "h",
+  "hpp",
+  "cs",
+  "go",
+  "rs",
+  "php",
+  "rb",
+  "kt",
+  "kts",
+  "swift",
+  "sh",
+  "bash",
+  "zsh",
+  "ps1",
+  "bat",
+  "cmd",
+  "properties",
+  "env",
+  "rtf",
+  "mp4",
+  "webm",
+  "ogg",
+  "ogv",
+  "mov",
+  "m4v",
+  "mp3",
+  "wav",
+  "oga",
+  "m4a",
+  "aac",
+  "flac",
+]);
+
+const DOCUMENT_PREVIEW_FILE_NAMES = new Set([
+  "dockerfile",
+  "makefile",
+  "readme",
+  "license",
+  ".gitignore",
+  ".env",
+]);
+
+export function getDocumentFileExtension(fileName?: string | null): string {
+  const cleanName = (fileName || "").toLowerCase().split("?")[0].split("#")[0];
+  return cleanName.match(/\.([^.]+)$/)?.[1] || "";
+}
+
+export function canPreviewDocument(fileName?: string | null): boolean {
+  const lowerName = (fileName || "").toLowerCase();
+  const extension = getDocumentFileExtension(fileName);
+  return DOCUMENT_PREVIEW_EXTENSIONS.has(extension) || DOCUMENT_PREVIEW_FILE_NAMES.has(lowerName);
+}
diff --git a/frontend/src/lib/document-utils/image.ts b/frontend/src/lib/document-utils/image.ts
index eca0fa78..df2ae374 100644
--- a/frontend/src/lib/document-utils/image.ts
+++ b/frontend/src/lib/document-utils/image.ts
@@ -4,7 +4,6 @@
  */
 
 export interface ImageCompressOptions {
-  maxSizeMB?: number;
   maxWidthOrHeight?: number;
   quality?: number;
 }
@@ -28,7 +27,6 @@ export async function compressImage(
   options: ImageCompressOptions = {}
 ): Promise<Blob> {
   const {
-    maxSizeMB = 10,
     maxWidthOrHeight = 2048,
     quality = 0.85
   } = options;
@@ -62,21 +60,7 @@ export async function compressImage(
       canvas.toBlob(
         (blob) => {
           if (blob) {
-            // Проверяем размер
-            const sizeMB = blob.size / (1024 * 1024);
-            if (sizeMB > maxSizeMB) {
-              // Если еще слишком большой, рекурсивно сжимаем с меньшим quality
-              const newQuality = quality * 0.8;
-              if (newQuality < 0.1) {
-                reject(new Error('Не удалось сжать изображение до требуемого размера'));
-              } else {
-                compressImage(file, { ...options, quality: newQuality })
-                  .then(resolve)
-                  .catch(reject);
-              }
-            } else {
-              resolve(blob);
-            }
+            resolve(blob);
           } else {
             reject(new Error('Ошибка создания Blob'));
           }
diff --git a/frontend/src/lib/document-utils/processor.ts b/frontend/src/lib/document-utils/processor.ts
index ca3f864c..9cf89616 100644
--- a/frontend/src/lib/document-utils/processor.ts
+++ b/frontend/src/lib/document-utils/processor.ts
@@ -4,9 +4,9 @@
  */
 
 import { performOCR, isOCRSupported } from './ocr';
-import { extractPDFText, generatePDFThumbnail, getPDFInfo } from './pdf';
+import { extractPDFText, generatePDFThumbnail } from './pdf';
 import { extractDOCXText, isDOCXFile } from './docx';
-import { compressImage, generateImageThumbnail, isImageFile } from './image';
+import { generateImageThumbnail, isImageFile } from './image';
 
 export interface ProcessingResult {
   extractedText: string;
@@ -24,17 +24,15 @@ export interface ProcessingResult {
 }
 
 export interface ProcessingProgress {
-  stage: 'compressing' | 'ocr' | 'extracting_text' | 'generating_thumbnail' | 'complete';
+  stage: 'ocr' | 'extracting_text' | 'generating_thumbnail' | 'complete';
   progress: number;
   message: string;
 }
 
 export interface ProcessDocumentOptions {
   enableOCR?: boolean;
-  enableCompression?: boolean;
   enableTextExtraction?: boolean;
   enableThumbnail?: boolean;
-  maxImageSizeMB?: number;
   onProgress?: (progress: ProcessingProgress) => void;
 }
 
@@ -42,7 +40,6 @@ export interface ProcessDocumentOptions {
  * Интеллектуально обрабатывает документ перед загрузкой
  * 
  * Автоматически определяет тип файла и выполняет:
- * - Сжатие изображений
  * - OCR для изображений
  * - Извлечение текста из PDF/DOCX
  * - Генерацию thumbnails
@@ -57,42 +54,18 @@ export async function processDocument(
 ): Promise<ProcessingResult> {
   const {
     enableOCR = true,
-    enableCompression = true,
     enableTextExtraction = true,
     enableThumbnail = true,
-    maxImageSizeMB = 10,
     onProgress
   } = options;
 
   const startTime = Date.now();
   let extractedText = '';
   let thumbnail: string | undefined;
-  let processedFile: File | Blob | undefined;
   let ocrApplied = false;
-  let compressed = false;
 
   try {
-    // 1. Сжатие изображений
-    if (enableCompression && isImageFile(file)) {
-      onProgress?.({
-        stage: 'compressing',
-        progress: 10,
-        message: 'Сжатие изображения...'
-      });
-
-      const sizeMB = file.size / (1024 * 1024);
-      if (sizeMB > maxImageSizeMB) {
-        processedFile = await compressImage(file, {
-          maxSizeMB: maxImageSizeMB,
-          quality: 0.85
-        });
-        compressed = true;
-      }
-    }
-
-    const fileToProcess = processedFile || file;
-
-    // 2. Извлечение текста
+    // 1. Извлечение текста
     if (enableTextExtraction) {
       onProgress?.({
         stage: 'extracting_text',
@@ -136,7 +109,7 @@ export async function processDocument(
       }
     }
 
-    // 3. Генерация thumbnail
+    // 2. Генерация thumbnail
     if (enableThumbnail) {
       onProgress?.({
         stage: 'generating_thumbnail',
@@ -162,15 +135,12 @@ export async function processDocument(
     return {
       extractedText,
       thumbnail,
-      processedFile,
       metadata: {
         originalSize: file.size,
-        processedSize: processedFile?.size,
         mimeType: file.type,
         hasText: extractedText.length > 0,
         processingTime,
-        ocrApplied,
-        compressed
+        ocrApplied
       }
     };
   } catch (error) {
diff --git a/frontend/src/lib/navigation-notifications.test.js b/frontend/src/lib/navigation-notifications.test.js
new file mode 100644
index 00000000..551adcb8
--- /dev/null
+++ b/frontend/src/lib/navigation-notifications.test.js
@@ -0,0 +1,25 @@
+import test from "node:test";
+import assert from "node:assert/strict";
+
+import { NAV_NOTIFICATION_CATEGORIES } from "./navigation-notifications.ts";
+import { getVerbCategory } from "./verbTranslations.ts";
+
+const notificationSamples = [
+  ["feed", "feed_new_post"],
+  ["messages", "chat_new_message"],
+  ["requests", "request_new"],
+  ["guests", "guest_visit_submitted"],
+  ["procurement", "procurement_new_request"],
+  ["tasks", "task_assigned"],
+  ["documents", "document_ready"],
+];
+
+test("navigation badges use the same categories as notification verbs", () => {
+  for (const [navigationKey, verb] of notificationSamples) {
+    assert.equal(
+      NAV_NOTIFICATION_CATEGORIES[navigationKey],
+      getVerbCategory(verb),
+      `${verb} must update the ${navigationKey} navigation badge`,
+    );
+  }
+});
diff --git a/frontend/src/lib/navigation-notifications.ts b/frontend/src/lib/navigation-notifications.ts
new file mode 100644
index 00000000..dcc6a9f1
--- /dev/null
+++ b/frontend/src/lib/navigation-notifications.ts
@@ -0,0 +1,9 @@
+export const NAV_NOTIFICATION_CATEGORIES = {
+  feed: "Новости",
+  messages: "Сообщения",
+  requests: "Заявления",
+  guests: "Гости",
+  procurement: "Закупки",
+  tasks: "Доска",
+  documents: "Документы",
+} as const;
diff --git a/frontend/src/types/api.ts b/frontend/src/types/api.ts
index 5fcfa7b2..d5c6920c 100644
--- a/frontend/src/types/api.ts
+++ b/frontend/src/types/api.ts
@@ -222,6 +222,9 @@ export interface TaskCard {
   linked_attendance_records_count?: number;
   linked_objects_count?: number;
   comments_count?: number;
+  attachments_count?: number;
+  checklist_total?: number;
+  checklist_completed?: number;
   created_at: string;
   updated_at: string;
 }
@@ -230,6 +233,7 @@ export interface TaskBoard {
   id: number;
   name: string;
   description?: string;
+  access_scope?: "all" | "private" | "restricted";
   created_by?: User;
   members?: number[];
   member_details?: User[];
@@ -451,22 +455,57 @@ export interface TaskLinkedAttendanceRecord {
   created_at: string;
 }
 
+export interface TaskExternalLink {
+  id: number;
+  task: number;
+  url: string;
+  title: string;
+  created_by?: User;
+  created_at: string;
+}
+
 export interface TaskActivity {
   id: number;
-  action: "created" | "updated" | "moved" | "linked" | "unlinked";
+  action: "created" | "updated" | "claimed" | "moved" | "linked" | "unlinked" | "attachment_added" | "attachment_removed" | "checklist_item_added" | "checklist_item_updated" | "checklist_item_completed" | "checklist_item_reopened" | "checklist_item_removed" | "comment_added" | "comment_edited" | "comment_removed";
   action_display?: string;
   actor?: User | null;
-  object_kind?: "post" | "message" | "calendar_event" | "document" | "request" | "procurement_request" | "employee" | "guest" | "guest_visit" | "attendance_record" | "";
+  object_kind?: "post" | "message" | "calendar_event" | "document" | "request" | "procurement_request" | "employee" | "guest" | "guest_visit" | "attendance_record" | "external_link" | "checklist_item" | "comment" | "";
   object_id?: number | null;
   metadata?: Record<string, unknown>;
   created_at: string;
 }
 
+export interface TaskAttachment {
+  id: number;
+  task: number;
+  file_name: string;
+  file_size: number;
+  mime_type?: string;
+  uploaded_by?: User;
+  created_at: string;
+  download_url: string;
+}
+
+export interface TaskChecklistItem {
+  id: number;
+  task: number;
+  title: string;
+  position: number;
+  is_completed: boolean;
+  created_by?: User;
+  completed_by?: User | null;
+  completed_at?: string | null;
+  created_at: string;
+  updated_at: string;
+}
+
 export interface TaskComment {
   id: number;
   task: number;
   author: User;
   text: string;
+  is_edited?: boolean;
+  edited_at?: string | null;
   created_at: string;
 }
 
@@ -660,7 +699,14 @@ export interface Document {
   departments?: { id: number; name: string }[];
   acknowledgements?: DocumentAcknowledgement[];
   acknowledgement_required?: boolean;
+  acknowledgement_for_all?: boolean;
+  acknowledgement_required_for_user?: boolean;
+  acknowledgement_recipients?: User[];
+  acknowledgement_departments?: { id: number; name: string }[];
   is_acknowledged?: boolean;
+  acknowledged_count?: number;
+  acknowledgement_total?: number;
+  comments_count?: number;
   linked_tasks?: MessageLinkedTask[];
 }
 
@@ -1008,6 +1054,17 @@ export type ProcurementItemExecutionStatus = 'pending' | 'ordered' | 'rejected'
 export type UrgencyLevel = 'low' | 'medium' | 'high' | 'critical';
 export type ApprovalStatus = 'pending' | 'approved' | 'rejected';
 
+export interface ProcurementItemAttachment {
+  id: number;
+  file_name: string;
+  file_size: number;
+  mime_type?: string;
+  uploaded_by: number;
+  uploaded_by_name?: string;
+  created_at: string;
+  download_url?: string;
+}
+
 export interface ProcurementItem {
   id: number;
   request: number;
@@ -1027,6 +1084,8 @@ export interface ProcurementItem {
   received_quantity?: number | null;
   initial_comment?: string;
   comments_count?: number;
+  attachments?: ProcurementItemAttachment[];
+  attachments_count?: number;
   equipment?: number | null;
 }
 
@@ -1110,6 +1169,7 @@ export interface ProcurementRequest {
   total_received_quantity?: number;
   quantity_unit_label?: string;
   comments_count?: number;
+  activity_count?: number;
   can_current_user_approve?: boolean;
   can_current_user_submit_for_approval?: boolean;
   can_current_user_start_work?: boolean;
@@ -1122,6 +1182,17 @@ export interface ProcurementRequest {
   completed_at?: string | null;
 }
 
+export interface ProcurementRequestActivity {
+  id: number;
+  action: string;
+  action_display: string;
+  actor?: User | null;
+  object_kind?: string;
+  object_id?: number | null;
+  metadata?: Record<string, unknown>;
+  created_at: string;
+}
+
 export interface ProcurementComment {
   id: number;
   request: number;