fix: hide department chats from unrelated users in messages list

frontend/src/app/messages/page.tsx

@@ -93,6 +93,24 @@ function getChatSortTimestamp(chat: Chat): number {
   return Number.isNaN(chatCreatedTs) ? 0 : chatCreatedTs;
 }
 
+function isChatVisibleInMessagesList(
+  chat: Chat,
+  visibleDepartmentIds: ReadonlySet<number>
+): boolean {
+  const chatType = chat.chat_type || chat.type;
+
+  if (chatType !== "comments") {
+    return true;
+  }
+
+  if (!isDepartmentCommentsChat(chat)) {
+    return false;
+  }
+
+  return typeof chat.context_object_id === "number"
+    && visibleDepartmentIds.has(chat.context_object_id);
+}
+
 export default function MessagesPage() {
   const { user } = useUser();
   const router = useRouter();
@@ -111,6 +129,15 @@ export default function MessagesPage() {
     }),
     [currentUserEmail, currentUserFirstName, currentUserLastName, currentUserPatronymic]
   );
+  const visibleDepartmentIds = useMemo(() => {
+    const ids = new Set<number>();
+    (user?.departments || []).forEach((department) => {
+      if (typeof department.id === "number") {
+        ids.add(department.id);
+      }
+    });
+    return ids;
+  }, [user?.departments]);
   const [chats, setChats] = useState<Chat[]>([]);
   const [search, setSearch] = useState("");
   const [chatTypeFilter, setChatTypeFilter] = useState<string>("all");
@@ -147,7 +174,11 @@ export default function MessagesPage() {
       }
       setError(null);
       const items = await apiClient.getAllChats();
-      setChats(items);
+      setChats(
+        items.filter((chat) =>
+          isChatVisibleInMessagesList(chat, visibleDepartmentIds)
+        )
+      );
       hasCompletedInitialLoadRef.current = true;
     } catch (e: unknown) {
       console.error("Ошибка загрузки чатов:", e);
@@ -158,7 +189,7 @@ export default function MessagesPage() {
         setLoading(false);
       }
     }
-  }, []);
+  }, [visibleDepartmentIds]);
 
   const refreshChat = useCallback(async (chatId: number) => {
     if (!Number.isFinite(chatId) || chatId <= 0) {
@@ -174,6 +205,10 @@ export default function MessagesPage() {
     try {
       const chat = await apiClient.getChat(chatId);
       setChats((prev) => {
+        if (!isChatVisibleInMessagesList(chat, visibleDepartmentIds)) {
+          return prev.filter((item) => item.id !== chatId);
+        }
+
         const existingIndex = prev.findIndex((item) => item.id === chatId);
         if (existingIndex === -1) {
           return [chat, ...prev];
@@ -192,7 +227,7 @@ export default function MessagesPage() {
     } finally {
       refreshChatInFlightRef.current.delete(chatId);
     }
-  }, [loadChats]);
+  }, [loadChats, visibleDepartmentIds]);
 
   useEffect(() => {
     void loadChats();