fix(frontend): stabilize department empty state layout

frontend/package.json

@@ -8,6 +8,7 @@
     "build": "next build",
     "start": "next start",
     "lint": "eslint",
+    "test": "node --experimental-strip-types --test src/**/*.test.ts",
     "postinstall": "cp node_modules/pdfjs-dist/build/pdf.worker.min.mjs public/pdf.worker.min.mjs || true"
   },
   "dependencies": {

frontend/src/app/departments/[id]/page.tsx

@@ -18,6 +18,10 @@ import {
 } from "lucide-react";
 
 import { AppShell } from "@/components/AppShell";
+import {
+  DEPARTMENT_MEMBERS_EMPTY_STATE_CLASSNAME,
+  getDepartmentMembersListClassName,
+} from "@/components/departments/layout";
 import { RequestAvatar } from "@/components/requests/RequestAvatar";
 import { SearchableSelectSingle } from "@/components/shared/SearchableSelect";
 import { Modal } from "@/components/ui/Modal";
@@ -367,6 +371,20 @@ function DepartmentEditorModal({
   );
 }
 
+function DepartmentMembersEmptyState() {
+  return (
+    <div className={DEPARTMENT_MEMBERS_EMPTY_STATE_CLASSNAME}>
+      <Users size={24} className="app-text-muted mx-auto mb-3" />
+      <p className="text-sm font-medium text-[var(--foreground)]">
+        Участники не найдены
+      </p>
+      <p className="app-text-muted mt-2 text-sm">
+        Измени поисковый запрос.
+      </p>
+    </div>
+  );
+}
+
 function AddMemberModal({
   isOpen,
   items,
@@ -707,13 +725,7 @@ export default function DepartmentDetailPage() {
                 ) : null}
               </div>
 
-              <div
-                className={
-                  isManagementMode
-                    ? "space-y-3"
-                    : "flex flex-wrap items-center gap-2"
-                }
-              >
+              <div className={getDepartmentMembersListClassName(isManagementMode)}>
                 {h.filteredMembers.length ? (
                   h.filteredMembers.map((member) => (
                     <DepartmentMemberRow
@@ -736,15 +748,7 @@ export default function DepartmentDetailPage() {
                     />
                   ))
                 ) : (
-                  <div className="app-surface-muted rounded-xl p-8 text-center">
-                    <Users size={24} className="app-text-muted mx-auto mb-3" />
-                    <p className="text-sm font-medium text-[var(--foreground)]">
-                      Участники не найдены
-                    </p>
-                    <p className="app-text-muted mt-2 text-sm">
-                      Измени поисковый запрос.
-                    </p>
-                  </div>
+                  <DepartmentMembersEmptyState />
                 )}
               </div>
 

frontend/src/components/departments/layout.test.ts

@@ -0,0 +1,22 @@
+import test from "node:test";
+import assert from "node:assert/strict";
+
+import {
+  DEPARTMENT_MEMBERS_EMPTY_STATE_CLASSNAME,
+  getDepartmentMembersListClassName,
+} from "./layout.ts";
+
+test("showcase members layout keeps bubble flow", () => {
+  assert.equal(
+    getDepartmentMembersListClassName(false),
+    "flex flex-wrap items-center gap-2",
+  );
+});
+
+test("management members layout keeps stacked editing rows", () => {
+  assert.equal(getDepartmentMembersListClassName(true), "space-y-3");
+});
+
+test("department empty state spans full section width", () => {
+  assert.match(DEPARTMENT_MEMBERS_EMPTY_STATE_CLASSNAME, /\bw-full\b/);
+});

frontend/src/components/departments/layout.ts

@@ -0,0 +1,8 @@
+export function getDepartmentMembersListClassName(isManagementMode: boolean) {
+  return isManagementMode
+    ? "space-y-3"
+    : "flex flex-wrap items-center gap-2";
+}
+
+export const DEPARTMENT_MEMBERS_EMPTY_STATE_CLASSNAME =
+  "app-surface-muted w-full rounded-xl p-8 text-center";