feat: full Room Service backend integration

- Migrations 086-088: room_service_settings, menu_items, orders+order_items
- Backend: /api/hotels/:slug/room-service/* routes (settings, menu CRUD,
  orders CRUD, public config, public order status)
- push.ts: sendPushToHotel() — push to all hotel staff on new order
- On new order: in-app notification + push to hotel staff
- api.ts: RoomService types + roomService API methods
- RoomServicePage: replaced mocked state with real API, 30s polling,
  add/edit/delete menu items modal, real advance/cancel order
- GuestRoomServicePage: fetches real menu + config, uses hotel payment
  methods, submits real order, polls status every 15s

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

src/lib/api.ts

@@ -982,6 +982,118 @@ export const api = {
         return json as { bookingId: string; status: string }
       }),
   },
+
+  // ── Room Service ──────────────────────────────────────────────────────────
+  roomService: {
+    getPublicConfig: (slug: string) =>
+      req<RoomServicePublicConfig>('GET', `/api/hotels/${slug}/room-service/public-config`),
+
+    getMenu: (slug: string) =>
+      req<RoomServiceMenuItem[]>('GET', `/api/hotels/${slug}/room-service/menu`),
+
+    getMenuAll: (slug: string) =>
+      req<RoomServiceMenuItem[]>('GET', `/api/hotels/${slug}/room-service/menu/all`),
+
+    createMenuItem: (slug: string, data: {
+      name: string; category?: string; price: number; emoji?: string
+      prepTimeMin?: number; isPopular?: boolean; sortOrder?: number
+    }) =>
+      req<RoomServiceMenuItem>('POST', `/api/hotels/${slug}/room-service/menu`, data),
+
+    updateMenuItem: (slug: string, itemId: string, data: Partial<{
+      name: string; category: string; price: number; emoji: string
+      prepTimeMin: number; isPopular: boolean; isStopList: boolean
+      isActive: boolean; sortOrder: number
+    }>) =>
+      req<RoomServiceMenuItem>('PATCH', `/api/hotels/${slug}/room-service/menu/${itemId}`, data),
+
+    deleteMenuItem: (slug: string, itemId: string) =>
+      req<void>('DELETE', `/api/hotels/${slug}/room-service/menu/${itemId}`),
+
+    getSettings: (slug: string) =>
+      req<RoomServiceSettings>('GET', `/api/hotels/${slug}/room-service/settings`),
+
+    updateSettings: (slug: string, data: { isActive?: boolean; serviceChargePct?: number }) =>
+      req<RoomServiceSettings>('PATCH', `/api/hotels/${slug}/room-service/settings`, data),
+
+    listOrders: (slug: string, params?: { status?: string; date?: string }) => {
+      const q = new URLSearchParams()
+      if (params?.status) q.set('status', params.status)
+      if (params?.date) q.set('date', params.date)
+      const qs = q.toString() ? `?${q.toString()}` : ''
+      return req<RoomServiceOrder[]>('GET', `/api/hotels/${slug}/room-service/orders${qs}`)
+    },
+
+    createOrder: (slug: string, data: {
+      roomNumber: string; guestName?: string; orderType?: 'room' | 'restaurant'
+      scheduledTime?: string; paymentMethod?: string; notes?: string
+      items: Array<{ menuItemId: string; quantity: number }>
+    }) =>
+      req<RoomServiceOrder>('POST', `/api/hotels/${slug}/room-service/orders`, data),
+
+    updateOrder: (slug: string, orderId: string, data: { status?: string; paymentMethod?: string }) =>
+      req<RoomServiceOrder>('PATCH', `/api/hotels/${slug}/room-service/orders/${orderId}`, data),
+  },
+}
+
+// ── Room Service types ────────────────────────────────────────────────────────
+
+export interface RoomServicePublicConfig {
+  hotelName: string
+  hotelSlug: string
+  serviceChargePct: number
+  paymentMethods: Array<{ id: string; name: string; type: string }>
+}
+
+export interface RoomServiceMenuItem {
+  id: string
+  hotelId: string
+  name: string
+  category: string
+  price: number
+  emoji: string
+  prepTimeMin: number
+  isPopular: boolean
+  isStopList: boolean
+  isActive: boolean
+  sortOrder: number
+  createdAt: string
+}
+
+export interface RoomServiceSettings {
+  hotelId: string
+  isActive: boolean
+  serviceChargePct: number
+  updatedAt: string
+}
+
+export type RoomServiceOrderStatus = 'new' | 'preparing' | 'ready' | 'delivered' | 'cancelled'
+
+export interface RoomServiceOrderItem {
+  id: string
+  menuItemId: string | null
+  name: string
+  emoji: string
+  price: number
+  quantity: number
+}
+
+export interface RoomServiceOrder {
+  id: string
+  hotelId: string
+  roomNumber: string
+  guestName: string
+  orderType: 'room' | 'restaurant'
+  scheduledTime: string | null
+  status: RoomServiceOrderStatus
+  paymentMethod: string | null
+  subtotal: number
+  serviceCharge: number
+  total: number
+  notes: string | null
+  items: RoomServiceOrderItem[]
+  createdAt: string
+  updatedAt: string
 }
 
 // ── Schedule ─────────────────────────────────────────────────────────────────