fix(ui): завершить доступность формы пользователей

app/(main)/users/page.tsx

@@ -96,8 +96,18 @@ function UsersContent() {
   const mutationController = useRef<AbortController | null>(null)
   const alive = useRef(true)
   useEffect(() => { alive.current = true; return () => { alive.current = false; mutationController.current?.abort() } }, [])
+  const formReturnFocus = useRef<HTMLElement | null>(null)
   const [sheetOpen, setSheetOpen] = useState(false)
   const [editUser, setEditUser] = useState<AppUser | null>(null)
+  useEffect(() => {
+    if (sheetOpen || !formReturnFocus.current) return
+    const label = formReturnFocus.current.getAttribute("aria-label")
+    const frame = requestAnimationFrame(() => {
+      const target = Array.from(document.querySelectorAll<HTMLButtonElement>("button[aria-label]")).find(button => button.getAttribute("aria-label") === label)
+      ;(target ?? document.querySelector<HTMLButtonElement>('button[aria-label="Добавить пользователя"]'))?.focus()
+    })
+    return () => cancelAnimationFrame(frame)
+  }, [sheetOpen])
   const [deleteTarget, setDeleteTarget] = useState<AppUser | null>(null)
 
   const loadLive = useCallback(async () => {
@@ -236,20 +246,20 @@ function UsersContent() {
   }
 
   return (
-    <div className="flex flex-col h-full">
+    <div className="flex flex-col h-full min-w-0">
       <PageHeader
         crumbs={[{ label: "Управление" }, { label: "Пользователи" }]}
         actions={
           <>
-          {isLive && <Button type="button" size="sm" variant="outline" disabled={!canRead || loading || saving || deleting || sheetOpen || !!deleteTarget} onClick={() => void loadLive()}>Обновить пользователей</Button>}
-          <Button type="button" size="sm" disabled={!writeReady || saving || deleting} onClick={() => { saveCheckpoint.current = null; setSaveError(null); setSaveBlocked(false); setSaveResume(false); setEditUser(null); setSheetOpen(true) }}>
-            <PlusIcon className="size-4" />Добавить пользователя
+          {isLive && <Button type="button" size="sm" variant="outline" aria-label="Обновить пользователей" disabled={!canRead || loading || saving || deleting || sheetOpen || !!deleteTarget} onClick={() => void loadLive()}>Обновить</Button>}
+          <Button type="button" size="sm" aria-label="Добавить пользователя" disabled={!writeReady || saving || deleting} onClick={() => { formReturnFocus.current = document.activeElement as HTMLElement; saveCheckpoint.current = null; setSaveError(null); setSaveBlocked(false); setSaveResume(false); setEditUser(null); setSheetOpen(true) }}>
+            <PlusIcon aria-hidden="true" className="size-4" />Добавить <span className="hidden sm:inline">пользователя</span>
           </Button>
           </>
         }
       />
 
-      <div className="flex-1 overflow-y-auto p-6 flex flex-col gap-5">
+      <div className="flex-1 overflow-y-auto p-4 md:p-6 min-w-0 flex flex-col gap-5">
         {operationNotice && <p role="status" className="text-sm text-muted-foreground">{operationNotice}</p>}
         {!isLive && <p role="status" className="text-sm text-muted-foreground">Демо: изменения сохраняются только в текущем экране.</p>}
         {!canRead && <p role="status">Для чтения пользователей требуется mm:users:read.</p>}
@@ -295,13 +305,14 @@ function UsersContent() {
             allSectionsCount={ALL_SECTIONS.length}
             isLoading={loading && !usersKnown}
             actionsDisabled={!writeReady || saving || deleting}
-            onEdit={(u) => { saveCheckpoint.current = null; setSaveError(null); setSaveBlocked(false); setSaveResume(false); setEditUser(u); setSheetOpen(true) }}
+            onEdit={(u) => { formReturnFocus.current = document.activeElement as HTMLElement; saveCheckpoint.current = null; setSaveError(null); setSaveBlocked(false); setSaveResume(false); setEditUser(u); setSheetOpen(true) }}
             onDelete={u => { setDeleteError(null); setDeleteTarget(u) }}
           />
         </DataPageCard>}
       </div>
 
       <UserSheet
+        returnFocus={formReturnFocus}
         key={sheetOpen ? (editUser?.id ?? "create") : "closed"}
         open={sheetOpen}
         user={editUser}