feat: auto-assign strategy (round_robin/least_loaded/first_free); urgent tasks always use first_free

backend/src/routes/housekeeping.ts

@@ -1,6 +1,6 @@
 import { FastifyPluginAsync } from 'fastify'
 import { db } from '../db'
-import { getHkSettings } from './housekeeping-settings'
+import { getHkSettings, autoAssignHousekeeper } from './housekeeping-settings'
 import { broadcast } from './ws'
 
 type SlugParam   = { Params: { slug: string } }
@@ -73,7 +73,19 @@ const housekeeping: FastifyPluginAsync = async (fastify) => {
       const hotelId = await getHotelId(slug)
       if (!hotelId) return reply.code(404).send({ error: 'Hotel not found' })
 
-      const { room_id, type, priority = 'medium', assignee_id, notes, due_date, category = 'housekeeping', photos = [] } = request.body
+      const { room_id, type, priority = 'medium', notes, due_date, category = 'housekeeping', photos = [] } = request.body
+      let { assignee_id } = request.body
+
+      // Auto-assign if enabled and no assignee provided
+      if (!assignee_id) {
+        const settings = await getHkSettings(hotelId).catch(() => null)
+        if (settings?.auto_assign) {
+          // Urgent tasks always use first_free strategy; otherwise use configured strategy
+          const strategy = priority === 'urgent' ? 'first_free' : (settings.auto_assign_strategy ?? 'least_loaded')
+          assignee_id = await autoAssignHousekeeper(hotelId, strategy).catch(() => null) ?? undefined
+        }
+      }
+
       const { rows: inserted } = await db.query(
         `INSERT INTO housekeeping_tasks
            (hotel_id, room_id, type, priority, assignee_id, notes, due_date, category, photos)