Add NetUP IPTV integration module (TV Welcome settings page)

- DB: migrations/002_netup.sql — netup_settings + netup_room_mapping tables
- Backend: routes/netup.ts — GET/PATCH settings, POST test, GET/POST room
  mappings, POST send TV message; notifyNetupCheckin/Checkout helpers
- Backend: bookings PATCH — fire-and-forget NetUP check-in/out on status change
- Frontend: TvWelcomePage — connection settings tab + room mapping tab
- Frontend: sidebarItem added to tv-welcome module (shows in sidebar menu)
- Frontend: ModulesPage Settings button navigates to /tv-welcome
- Frontend: BookingModal — "Сообщение гостю на TV" panel for existing bookings

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

src/lib/api.ts

@@ -265,6 +265,29 @@ export const api = {
     update: (slug: string, data: HotelPayload) =>
       req<Hotel>('PATCH', `/api/hotels/${slug}`, toHotelPayload(data)),
   },
+
+  // ── NetUP IPTV ────────────────────────────────────────────────────────────
+  netup: {
+    getSettings: (slug: string) =>
+      req<{ server_url: string; username: string; password: string; default_language: string; enabled: boolean }>(
+        'GET', `/api/hotels/${slug}/netup/settings`),
+
+    saveSettings: (slug: string, data: { server_url: string; username: string; password?: string; default_language: string; enabled: boolean }) =>
+      req<{ ok: boolean }>('PATCH', `/api/hotels/${slug}/netup/settings`, data),
+
+    testConnection: (slug: string) =>
+      req<{ ok: boolean; message: string }>('POST', `/api/hotels/${slug}/netup/test`),
+
+    getRoomMappings: (slug: string) =>
+      req<{ id: string; number: string; type: string; netup_room_number: string }[]>(
+        'GET', `/api/hotels/${slug}/netup/rooms`),
+
+    saveRoomMappings: (slug: string, mappings: { pms_room_id: string; netup_room_number: string }[]) =>
+      req<{ ok: boolean }>('POST', `/api/hotels/${slug}/netup/rooms`, { mappings }),
+
+    sendMessage: (slug: string, roomId: string, message: string, guestName?: string) =>
+      req<{ ok: boolean }>('POST', `/api/hotels/${slug}/netup/message`, { room_id: roomId, message, guest_name: guestName }),
+  },
 }
 
 // ── Payload types & converters ───────────────────────────────────────────────