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>

src/contexts/ModulesContext.tsx

@@ -1,15 +1,16 @@
 import { createContext, useContext, useState } from 'react'
 import type { ModuleStatus } from '../data/modulesData'
 
-// Default statuses for demo
 const DEFAULT_STATUSES: Record<string, ModuleStatus> = {
-  'wifi-auth':      'active',
-  'payments':       'trial',
-  'tv-welcome':     'inactive',
-  'smart-locks':    'inactive',
-  'olap-reports':   'active',   // active в демо — виден в сайдбаре
-  'website-builder':'inactive',
-  'booking-widget': 'inactive',
+  'housekeeping':     'active',
+  'channel-manager':  'active',
+  'wifi-auth':        'active',
+  'payments':         'trial',
+  'tv-welcome':       'inactive',
+  'smart-locks':      'inactive',
+  'olap-reports':     'active',
+  'website-builder':  'inactive',
+  'booking-widget':   'inactive',
 }
 
 interface ModulesContextValue {