feat: TTLock integration + fix agent offline status

- Add TTLock electronic lock module: settings page, room-lock mapping,
  card issuance via agent command (ttlock:write_card)
- Fix agent offline: EquipmentPage now polls every 30s + reacts to
  workstation:online/offline WebSocket events instantly
- Backend broadcasts workstation online/offline events to hotel clients
  via existing WebSocket (agent-ws.ts)
- New DB migration 048_ttlock.sql: hotel_ttlock_config, room_lock_mappings,
  card_issuances tables
- New backend routes: GET/PATCH ttlock/config, POST ttlock/token,
  GET ttlock/locks, POST/DELETE ttlock/room-locks, POST issue-card
- "Выдать ключ (TTLock)" button in BookingDetailPanel for confirmed/checked_in
- TTLock page added to sidebar under Настройки

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/pages/EquipmentPage.tsx

@@ -8,6 +8,7 @@ import {
 import { cn } from '../lib/utils'
 import { api, type Workstation, type WorkstationDevice } from '../lib/api'
 import { useAuth } from '../contexts/AuthContext'
+import { useHotelSocket } from '../hooks/useHotelSocket'
 
 // ─── Helpers ──────────────────────────────────────────────────────────────────
 
@@ -1024,7 +1025,7 @@ function WorkstationCard({
 // ─── Main Page ────────────────────────────────────────────────────────────────
 
 export function EquipmentPage() {
-  const { user } = useAuth()
+  const { user, session } = useAuth()
   const slug = user?.hotelSlug ?? ''
 
   const [workstations, setWorkstations] = useState<Workstation[]>([])
@@ -1051,6 +1052,23 @@ export function EquipmentPage() {
 
   useEffect(() => { load() }, [load])
 
+  // Auto-refresh every 30 s so online/offline status stays current
+  useEffect(() => {
+    const timer = setInterval(load, 30_000)
+    return () => clearInterval(timer)
+  }, [load])
+
+  // Instant update when agent connects or disconnects
+  useHotelSocket({
+    slug,
+    token: session?.token ?? null,
+    onMessage: (msg) => {
+      if (msg.type === 'workstation:online' || msg.type === 'workstation:offline') {
+        load()
+      }
+    },
+  })
+
   useEffect(() => {
     api.agents.getLatestRelease().then(setLatestRelease).catch(() => {})
   }, [])