feat: housekeeping automation — auto-task on checkout + room status on done

Backend:
- Migration 023: housekeeping_settings table (checkout_auto, checkout_priority, inspection_after_clean)
- New route: GET/PATCH /api/hotels/:slug/housekeeping-settings
- bookings.ts: on checked_out → auto-create turnover task + mark room dirty + broadcast WS
- housekeeping.ts: on task done → update room status (inspect|clean per setting) + broadcast WS
- ws.ts: export broadcast() for use in other routes

Frontend:
- HousekeepingPage: load/save settings to API, live Loader on save button
- useHotelSocket: add housekeeping WS message types
- HousekeepingPage: subscribe to WS — new tasks appear instantly without refresh
- BookingModal: show total section when room + nights selected (not just when total > 0)

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

backend/src/routes/housekeeping-settings.ts

@@ -0,0 +1,81 @@
+import { FastifyPluginAsync } from 'fastify'
+import { db } from '../db'
+
+type SlugParam = { Params: { slug: string } }
+
+export interface HkSettings {
+  checkout_auto: boolean
+  checkout_priority: string
+  inspection_after_clean: boolean
+}
+
+const DEFAULT_SETTINGS: HkSettings = {
+  checkout_auto: true,
+  checkout_priority: 'high',
+  inspection_after_clean: true,
+}
+
+export async function getHkSettings(hotelId: string): Promise<HkSettings> {
+  const { rows } = await db.query(
+    'SELECT checkout_auto, checkout_priority, inspection_after_clean FROM housekeeping_settings WHERE hotel_id = $1',
+    [hotelId],
+  )
+  return rows[0] ?? DEFAULT_SETTINGS
+}
+
+const housekeepingSettings: FastifyPluginAsync = async (fastify) => {
+  const getHotelId = async (slug: string): Promise<string | null> => {
+    const { rows } = await db.query('SELECT id FROM hotels WHERE slug = $1', [slug])
+    return rows[0]?.id ?? null
+  }
+
+  const canAccess = (userSlug: string | null, role: string, slug: string) =>
+    role === 'super_admin' || userSlug === slug
+
+  // GET /api/hotels/:slug/housekeeping-settings
+  fastify.get<SlugParam>(
+    '/api/hotels/:slug/housekeeping-settings',
+    { onRequest: [fastify.authenticate] },
+    async (request, reply) => {
+      const { slug } = request.params
+      if (!canAccess(request.user.hotelSlug, request.user.role, slug))
+        return reply.code(403).send({ error: 'Forbidden' })
+      const hotelId = await getHotelId(slug)
+      if (!hotelId) return reply.code(404).send({ error: 'Hotel not found' })
+      return getHkSettings(hotelId)
+    },
+  )
+
+  // PATCH /api/hotels/:slug/housekeeping-settings
+  fastify.patch<SlugParam & { Body: Partial<HkSettings> }>(
+    '/api/hotels/:slug/housekeeping-settings',
+    { onRequest: [fastify.authenticate] },
+    async (request, reply) => {
+      const { slug } = request.params
+      if (!canAccess(request.user.hotelSlug, request.user.role, slug))
+        return reply.code(403).send({ error: 'Forbidden' })
+      const hotelId = await getHotelId(slug)
+      if (!hotelId) return reply.code(404).send({ error: 'Hotel not found' })
+
+      const { checkout_auto, checkout_priority, inspection_after_clean } = request.body
+      await db.query(
+        `INSERT INTO housekeeping_settings (hotel_id, checkout_auto, checkout_priority, inspection_after_clean)
+         VALUES ($1, $2, $3, $4)
+         ON CONFLICT (hotel_id) DO UPDATE SET
+           checkout_auto          = COALESCE(EXCLUDED.checkout_auto,          housekeeping_settings.checkout_auto),
+           checkout_priority      = COALESCE(EXCLUDED.checkout_priority,      housekeeping_settings.checkout_priority),
+           inspection_after_clean = COALESCE(EXCLUDED.inspection_after_clean, housekeeping_settings.inspection_after_clean),
+           updated_at             = NOW()`,
+        [
+          hotelId,
+          checkout_auto         ?? DEFAULT_SETTINGS.checkout_auto,
+          checkout_priority     ?? DEFAULT_SETTINGS.checkout_priority,
+          inspection_after_clean ?? DEFAULT_SETTINGS.inspection_after_clean,
+        ],
+      )
+      return getHkSettings(hotelId)
+    },
+  )
+}
+
+export default housekeepingSettings