feat: add category field to housekeeping tasks + TechnicalPage for maintenance tasks

- Add migration 025 to add `category` column (housekeeping/maintenance) to housekeeping_tasks
- Backend: filter by ?category= in GET, store category in POST, allow patching category
- API client: HkPayload + housekeeping.list() now support category param
- HousekeepingPage: filters by category=housekeeping so maintenance tasks don't appear
- RoomContextMenu: priority sub-form for dirty/cleaning status, tech task creation inline form
- BookingCalendar: accepts onMaintenanceTaskCreate prop, passes priority to onRoomUpdate
- CalendarPage: handleRoomUpdate creates task for dirty+cleaning (with priority), new handleMaintenanceTaskCreate for category=maintenance tasks
- TechnicalPage: new page for viewing/creating/updating maintenance tasks
- App.tsx: /technical route added
- Sidebar: Тех. задачи nav item added under Управление

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

backend/migrations/025_task_category.sql

@@ -0,0 +1,6 @@
+ALTER TABLE housekeeping_tasks
+  ADD COLUMN IF NOT EXISTS category VARCHAR(20) NOT NULL DEFAULT 'housekeeping';
+
+-- Index for faster filtering
+CREATE INDEX IF NOT EXISTS housekeeping_tasks_category_idx
+  ON housekeeping_tasks(hotel_id, category, created_at DESC);

backend/src/routes/housekeeping.ts

@@ -16,7 +16,7 @@ const housekeeping: FastifyPluginAsync = async (fastify) => {
     role === 'super_admin' || userSlug === slug
 
   // ── GET /api/hotels/:slug/housekeeping ─────────────────────────────────────
-  fastify.get<SlugParam & { Querystring: { status?: string; date?: string } }>(
+  fastify.get<SlugParam & { Querystring: { status?: string; date?: string; category?: string } }>(
     '/api/hotels/:slug/housekeeping',
     { onRequest: [fastify.authenticate] },
     async (request, reply) => {
@@ -31,9 +31,10 @@ const housekeeping: FastifyPluginAsync = async (fastify) => {
       const values: unknown[] = [hotelId]
       let idx = 2
 
-      const { status, date } = request.query
-      if (status) { conditions.push(`t.status = $${idx}`);   values.push(status); idx++ }
-      if (date)   { conditions.push(`t.due_date = $${idx}`); values.push(date);   idx++ }
+      const { status, date, category } = request.query
+      if (status)   { conditions.push(`t.status = $${idx}`);   values.push(status);   idx++ }
+      if (date)     { conditions.push(`t.due_date = $${idx}`); values.push(date);     idx++ }
+      if (category) { conditions.push(`t.category = $${idx}`); values.push(category); idx++ }
 
       const { rows } = await db.query(
         `SELECT t.*,
@@ -55,7 +56,7 @@ const housekeeping: FastifyPluginAsync = async (fastify) => {
   // ── POST /api/hotels/:slug/housekeeping ────────────────────────────────────
   fastify.post<SlugParam & { Body: {
     room_id?: string; type: string; priority?: string
-    assignee_id?: string; notes?: string; due_date?: string
+    assignee_id?: string; notes?: string; due_date?: string; category?: string
   } }>(
     '/api/hotels/:slug/housekeeping',
     { onRequest: [fastify.authenticate] },
@@ -67,13 +68,13 @@ 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 } = request.body
+      const { room_id, type, priority = 'medium', assignee_id, notes, due_date, category = 'housekeeping' } = request.body
       const { rows } = await db.query(
         `INSERT INTO housekeeping_tasks
-           (hotel_id, room_id, type, priority, assignee_id, notes, due_date)
-         VALUES ($1,$2,$3,$4,$5,$6,$7) RETURNING *`,
+           (hotel_id, room_id, type, priority, assignee_id, notes, due_date, category)
+         VALUES ($1,$2,$3,$4,$5,$6,$7,$8) RETURNING *`,
         [hotelId, room_id ?? null, type, priority,
-         assignee_id ?? null, notes ?? null, due_date ?? null],
+         assignee_id ?? null, notes ?? null, due_date ?? null, category],
       )
       return reply.code(201).send(rows[0])
     },
@@ -91,7 +92,7 @@ const housekeeping: FastifyPluginAsync = async (fastify) => {
       const hotelId = await getHotelId(slug)
       if (!hotelId) return reply.code(404).send({ error: 'Hotel not found' })
 
-      const allowed = ['room_id','type','status','priority','assignee_id','notes','due_date']
+      const allowed = ['room_id','type','status','priority','assignee_id','notes','due_date','category']
       const updates: string[] = []
       const values: unknown[] = []
       let idx = 1