feat: notifications API, auto-jobs, calendar housekeeping fixes

Backend:
- notifications table (024 migration) — stores per-hotel notifications
- GET/PATCH/POST/DELETE /api/hotels/:slug/notifications endpoints
- createNotification() helper used by jobs + future hooks
- jobs.ts — background tasks every 10min: auto-cancel no-shows and
  auto-checkout overdue stays based on hotel_settings, broadcasts WS
  events and creates notifications for each automated action

Frontend:
- CalendarPage: handle housekeeping_done WS → update room status in
  calendar in real-time (bug fix)
- CalendarPage: when manually setting room to dirty via context menu,
  auto-create housekeeping task and broadcast via WS (bug fix)
- NotificationsContext: replaced mock data with real API integration,
  polls every 60s, syncs markRead/delete to backend
- SettingsPage booking section: auto-cancel no-show toggle + hours
  selector; auto-checkout toggle + hours selector
- api.ts: notifications API methods
- useHotelSocket: notification:new WS message type

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

src/contexts/NotificationsContext.tsx

@@ -1,4 +1,6 @@
-import { createContext, useContext, useState, type ReactNode } from 'react'
+import { createContext, useContext, useState, useEffect, useCallback, type ReactNode } from 'react'
+import { useAuth } from './AuthContext'
+import { api } from '../lib/api'
 
 export type NotifType =
   | 'booking_new'
@@ -22,105 +24,86 @@ export interface Notification {
   link?: string
 }
 
-const INITIAL_NOTIFICATIONS: Notification[] = [
-  {
-    id: 'n1', type: 'booking_new',
-    title: 'Новое бронирование',
-    body: 'Алексей Смирнов забронировал номер 205 (Делюкс) на 14–18 марта',
-    time: new Date(Date.now() - 4 * 60000).toISOString(),
-    isRead: false, link: '/bookings',
-  },
-  {
-    id: 'n2', type: 'channel_error',
-    title: 'Ошибка синхронизации',
-    body: 'Booking.com: не удалось обновить доступность. Проверьте подключение.',
-    time: new Date(Date.now() - 18 * 60000).toISOString(),
-    isRead: false, link: '/channels',
-  },
-  {
-    id: 'n3', type: 'booking_checkin',
-    title: 'Заезд сегодня',
-    body: 'Мария Иванова · номер 101 · заезд в 14:00',
-    time: new Date(Date.now() - 45 * 60000).toISOString(),
-    isRead: false, link: '/bookings',
-  },
-  {
-    id: 'n4', type: 'review',
-    title: 'Новый отзыв требует модерации',
-    body: 'Гость оставил оценку 2/5 — отзыв ждёт вашего ответа',
-    time: new Date(Date.now() - 2 * 3600000).toISOString(),
-    isRead: false, link: '/reviews',
-  },
-  {
-    id: 'n5', type: 'housekeeping',
-    title: 'Уборка завершена',
-    body: 'Горничная Козлова Н. завершила уборку номеров 101, 102, 203',
-    time: new Date(Date.now() - 3 * 3600000).toISOString(),
-    isRead: true, link: '/housekeeping',
-  },
-  {
-    id: 'n6', type: 'payment',
-    title: 'Оплата получена',
-    body: 'Иван Петров оплатил бронирование #B-2847 — 12 400 ₽',
-    time: new Date(Date.now() - 5 * 3600000).toISOString(),
-    isRead: true,
-  },
-  {
-    id: 'n7', type: 'booking_cancelled',
-    title: 'Бронирование отменено',
-    body: 'Дмитрий Волков отменил бронь номера 304 на 20–22 марта',
-    time: new Date(Date.now() - 26 * 3600000).toISOString(),
-    isRead: true, link: '/bookings',
-  },
-  {
-    id: 'n8', type: 'booking_checkout',
-    title: 'Выезд завершён',
-    body: 'Семья Соколовых выехала из номера 206. Нужна уборка.',
-    time: new Date(Date.now() - 28 * 3600000).toISOString(),
-    isRead: true, link: '/housekeeping',
-  },
-  {
-    id: 'n9', type: 'system',
-    title: 'Обновление системы',
-    body: 'HotelSync обновлён до версии 0.2.0. Что нового — в журнале изменений.',
-    time: new Date(Date.now() - 3 * 86400000).toISOString(),
-    isRead: true,
-  },
-]
-
 interface NotificationsContextValue {
   notifications: Notification[]
   addNotification: (n: Omit<Notification, 'id' | 'time' | 'isRead'>) => void
   markRead: (id: string) => void
   markAllRead: () => void
   removeNotif: (id: string) => void
+  refresh: () => void
 }
 
 const NotificationsContext = createContext<NotificationsContextValue | null>(null)
 
-export function NotificationsProvider({ children }: { children: ReactNode }) {
-  const [notifications, setNotifications] = useState<Notification[]>(INITIAL_NOTIFICATIONS)
+function toNotif(raw: Record<string, unknown>): Notification {
+  return {
+    id:     String(raw.id),
+    type:   (raw.type as NotifType) ?? 'system',
+    title:  String(raw.title ?? ''),
+    body:   String(raw.body ?? ''),
+    time:   String(raw.createdAt ?? raw.created_at ?? new Date().toISOString()),
+    isRead: Boolean(raw.isRead ?? raw.is_read ?? false),
+    link:   raw.link ? String(raw.link) : undefined,
+  }
+}
 
-  const addNotification = (n: Omit<Notification, 'id' | 'time' | 'isRead'>) => {
+export function NotificationsProvider({ children }: { children: ReactNode }) {
+  const { user } = useAuth()
+  const slug = user?.hotelSlug ?? ''
+
+  const [notifications, setNotifications] = useState<Notification[]>([])
+
+  const refresh = useCallback(() => {
+    if (!slug) return
+    api.notifications.list(slug)
+      .then(rows => setNotifications(rows.map(toNotif)))
+      .catch(() => {})
+  }, [slug])
+
+  // Load on mount / slug change
+  useEffect(() => {
+    refresh()
+  }, [refresh])
+
+  // Poll every 60s for new notifications
+  useEffect(() => {
+    if (!slug) return
+    const timer = setInterval(refresh, 60_000)
+    return () => clearInterval(timer)
+  }, [slug, refresh])
+
+  const addNotification = useCallback((n: Omit<Notification, 'id' | 'time' | 'isRead'>) => {
     setNotifications(prev => [{
       ...n,
-      id: `n-${Date.now()}`,
+      id: `local-${Date.now()}`,
       time: new Date().toISOString(),
       isRead: false,
     }, ...prev])
-  }
+  }, [])
 
-  const markRead = (id: string) =>
+  const markRead = useCallback((id: string) => {
     setNotifications(prev => prev.map(n => n.id === id ? { ...n, isRead: true } : n))
+    if (slug && !id.startsWith('local-')) {
+      api.notifications.markRead(slug, id).catch(() => {})
+    }
+  }, [slug])
 
-  const markAllRead = () =>
+  const markAllRead = useCallback(() => {
     setNotifications(prev => prev.map(n => ({ ...n, isRead: true })))
+    if (slug) {
+      api.notifications.markAllRead(slug).catch(() => {})
+    }
+  }, [slug])
 
-  const removeNotif = (id: string) =>
+  const removeNotif = useCallback((id: string) => {
     setNotifications(prev => prev.filter(n => n.id !== id))
+    if (slug && !id.startsWith('local-')) {
+      api.notifications.delete(slug, id).catch(() => {})
+    }
+  }, [slug])
 
   return (
-    <NotificationsContext.Provider value={{ notifications, addNotification, markRead, markAllRead, removeNotif }}>
+    <NotificationsContext.Provider value={{ notifications, addNotification, markRead, markAllRead, removeNotif, refresh }}>
       {children}
     </NotificationsContext.Provider>
   )