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/lib/api.ts

@@ -601,6 +601,36 @@ export const api = {
     regenerateToken: (slug: string) =>
       req<{ apiToken: string }>('POST', `/api/hotels/${slug}/wifi-settings/regenerate-token`),
   },
+
+  // ── TTLock ─────────────────────────────────────────────────────────────────
+  ttlock: {
+    getConfig: (slug: string) =>
+      req<TTLockConfig>('GET', `/api/hotels/${slug}/ttlock/config`),
+
+    updateConfig: (slug: string, data: TTLockConfigUpdate) =>
+      req<{ ok: boolean }>('PATCH', `/api/hotels/${slug}/ttlock/config`, data),
+
+    testToken: (slug: string) =>
+      req<{ ok: boolean; expiresAt: string }>('POST', `/api/hotels/${slug}/ttlock/token`),
+
+    getLocks: (slug: string) =>
+      req<TTLockDevice[]>('GET', `/api/hotels/${slug}/ttlock/locks`),
+
+    getRoomLocks: (slug: string) =>
+      req<RoomLockMapping[]>('GET', `/api/hotels/${slug}/ttlock/room-locks`),
+
+    mapRoom: (slug: string, data: { roomId: string; lockId: number; lockName?: string }) =>
+      req<{ ok: boolean }>('POST', `/api/hotels/${slug}/ttlock/room-locks`, data),
+
+    unmapRoom: (slug: string, roomId: string) =>
+      req<{ ok: boolean }>('DELETE', `/api/hotels/${slug}/ttlock/room-locks/${roomId}`),
+
+    issueCard: (slug: string, bookingId: string) =>
+      req<CardIssuanceResult>('POST', `/api/hotels/${slug}/bookings/${bookingId}/issue-card`),
+
+    getCards: (slug: string, bookingId: string) =>
+      req<CardIssuance[]>('GET', `/api/hotels/${slug}/bookings/${bookingId}/cards`),
+  },
 }
 
 // ── Schedule ─────────────────────────────────────────────────────────────────
@@ -1051,6 +1081,58 @@ export interface Workstation {
   devices: WorkstationDevice[] | null
 }
 
+export interface TTLockConfig {
+  isEnabled: boolean
+  clientId: string
+  ttlockUsername: string
+  workstationId: string | null
+  hasToken: boolean
+  tokenExpiresAt: string | null
+}
+
+export interface TTLockConfigUpdate {
+  isEnabled?: boolean
+  clientId?: string
+  clientSecret?: string
+  ttlockUsername?: string
+  ttlockPassword?: string
+  workstationId?: string | null
+}
+
+export interface TTLockDevice {
+  lockId: number
+  name: string
+}
+
+export interface RoomLockMapping {
+  roomId: string
+  roomName: string
+  roomNumber: string
+  lockId: number
+  lockName: string | null
+}
+
+export interface CardIssuanceResult {
+  ok: boolean
+  issuanceId: string
+  issuedAt: string
+  lockName: string | null
+  roomName: string
+  checkIn: string
+  checkOut: string
+}
+
+export interface CardIssuance {
+  id: string
+  lockId: number
+  issuedAt: string
+  issuedBy: string | null
+  checkIn: string
+  checkOut: string
+  isRevoked: boolean
+  revokedAt: string | null
+}
+
 export interface WifiSettings {
   id: string
   hotelId: string