Wide BookingModal (2-col), RoomModal, RU channels, migration module, all modules active

- BookingModal: 2-column layout (size=2xl/max-w-3xl), no scroll needed; hourly mode toggle for rooms with allowHourly=true
- RoomModal: full add/edit form with hourly rate toggle and amenities checkboxes; RoomsPage wired up
- Channel manager: Яндекс Путешествия, Островок, Суточно.ру, OneTwoTrip added; split into RU/International sections
- Migration module: 3-step wizard (source select → file upload → progress/results)
- All modules set to active by default (version bump to reset localStorage)
- BookingCalendar booking blocks: guest count badge (Xг), unpaid red dot indicator

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

src/components/ui/Modal.tsx

@@ -7,7 +7,7 @@ interface ModalProps {
   onClose: () => void
   title: string
   children: React.ReactNode
-  size?: 'sm' | 'md' | 'lg' | 'xl'
+  size?: 'sm' | 'md' | 'lg' | 'xl' | '2xl'
   footer?: React.ReactNode
 }
 
@@ -16,6 +16,7 @@ const SIZES = {
   md: 'max-w-md',
   lg: 'max-w-lg',
   xl: 'max-w-2xl',
+  '2xl': 'max-w-3xl',
 }
 
 export function Modal({ open, onClose, title, children, size = 'md', footer }: ModalProps) {