feat: room history tab + tech task resolution comment

- RoomModal: new "История" tab showing all housekeeping and maintenance tasks for the room
  - Groups tasks by date (newest first), expandable cards
  - Shows: assignee, start time, end time, duration (started_at → completed_at)
  - For maintenance: description, problem/solution photos with lightbox viewer
  - Timing grid: start / completion timestamps
- Backend GET /housekeeping: add room_id filter param
- TechnicalPage CompletionModal: add resolution comment field saved to task notes
- api.ts: housekeeping.list() accepts roomId param

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

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; category?: string } }>(
+  fastify.get<SlugParam & { Querystring: { status?: string; date?: string; category?: string; room_id?: string } }>(
     '/api/hotels/:slug/housekeeping',
     { onRequest: [fastify.authenticate] },
     async (request, reply) => {
@@ -31,7 +31,7 @@ const housekeeping: FastifyPluginAsync = async (fastify) => {
       const values: unknown[] = [hotelId]
       let idx = 2
 
-      const { status, date, category } = request.query
+      const { status, date, category, room_id } = request.query
       if (status === 'active') {
         conditions.push(`t.status IN ('pending', 'in_progress')`)
       } else if (status) {
@@ -39,6 +39,7 @@ const housekeeping: FastifyPluginAsync = async (fastify) => {
       }
       if (date)     { conditions.push(`t.due_date = $${idx}`); values.push(date);     idx++ }
       if (category) { conditions.push(`t.category = $${idx}`); values.push(category); idx++ }
+      if (room_id)  { conditions.push(`t.room_id = $${idx}`);  values.push(room_id);  idx++ }
 
       const { rows } = await db.query(
         `SELECT t.*,
@@ -50,7 +51,7 @@ const housekeeping: FastifyPluginAsync = async (fastify) => {
           WHERE ${conditions.join(' AND ')}
           ORDER BY
             CASE t.priority WHEN 'urgent' THEN 1 WHEN 'high' THEN 2 WHEN 'medium' THEN 3 ELSE 4 END,
-            t.created_at`,
+            COALESCE(t.completed_at, t.created_at) DESC`,
         values,
       )
       return rows