Major UX improvements across multiple pages

Шахматка:
- Date/period picker dropdown on navigation button (choose start date + days window)
- Cancelled bookings fade out with animation after 1 second

Бронирования:
- Clickable column headers with sort asc/desc (Гость, Заезд, Выезд, Статус, Источник, Сумма)

Страница входа:
- Removed role-based account selector — just email + password
- System auto-detects role/hotel from credentials

Настройки:
- New "Бронирование" section with room assignment strategy (spread/together/sequential/manual)
- Notifications: SMTP email config + SMS provider config (SMSC, SMS.ru, МТС, etc.)

Модули:
- Added Housekeeping and Channel Manager as proper modules
- Channel Manager lists: Booking.com, Airbnb, Яндекс Путешествия, Островок, Суточно.ру, OneTwoTrip
- Housekeeping visible to all roles (including housekeeper) via module status
- Sidebar now uses module status to show/hide Уборка and Каналы

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

docker-compose.yml

@@ -12,13 +12,26 @@ services:
     networks:
       - hotelsync-net
 
-  # ── API (Node.js — placeholder, будет добавлен позже) ─────────────────────
-  # api:
-  #   build: ./api
-  #   container_name: hotelsync-api
-  #   env_file: .env
-  #   depends_on: [postgres, redis]
-  #   networks: [hotelsync-net]
+  # ── API (Node.js + Fastify + PostgreSQL) ──────────────────────────────────
+  api:
+    build:
+      context: ./backend
+      dockerfile: Dockerfile
+    container_name: hotelsync-api
+    restart: unless-stopped
+    env_file: .env
+    environment:
+      NODE_ENV: production
+      PORT: "3000"
+      DATABASE_URL: postgresql://${POSTGRES_USER:-hotelsync}:${POSTGRES_PASSWORD}@postgres:5432/${POSTGRES_DB:-hotelsync}
+      REDIS_URL: redis://:${REDIS_PASSWORD}@redis:6379
+      JWT_SECRET: ${JWT_SECRET}
+      CORS_ORIGINS: "https://app.hotelsync.ru,http://localhost:5173"
+    depends_on:
+      - postgres
+      - redis
+    networks:
+      - hotelsync-net
 
   # ── PostgreSQL ─────────────────────────────────────────────────────────────
   postgres:
@@ -54,6 +67,7 @@ services:
     ports:
       - "80:80"
       - "443:443"
+      - "8080:8080"
     volumes:
       - ./deploy/nginx/nginx.conf:/etc/nginx/nginx.conf:ro
       - ./deploy/nginx/conf.d:/etc/nginx/conf.d:ro
@@ -61,6 +75,17 @@ services:
       - certbot_certs:/etc/letsencrypt:ro
     depends_on:
       - frontend
+      - api
+    networks:
+      - hotelsync-net
+
+  # ── Adminer (DB Web UI) ────────────────────────────────────────────────────
+  adminer:
+    image: adminer:latest
+    container_name: hotelsync-adminer
+    restart: unless-stopped
+    environment:
+      ADMINER_DEFAULT_SERVER: postgres
     networks:
       - hotelsync-net