feat: deposit release lock + billing fixes + centralized payment gateway

- Add releaseRequiresCheckout toggle in DepositSettingsPage (UI + payload)
- Migration 066: release_requires_checkout column on hotel_deposit_settings
- Migration 065: hotel_payment_gateways table for centralized YooKassa config
- Block deposit release buttons when releaseRequiresCheckout && not checked_out
- Fix billing calculation: use Number() to prevent PostgreSQL NUMERIC string concat
- Fix minibar billing: show current price (JOIN minibar_items.price) not recorded price
- Auto-poll deposit status every 5s while hold_created; clear QR message on confirmation
- Add billing/folio tab in BookingDetailPanel (room charges + minibar + payments + balance)
- PaymentSettingsPage: new "Онлайн-оплата (ЮКасса)" section with gateway CRUD
- DepositSettingsPage: replace YooKassa fields with link to centralized payment settings
- BookingWidgetPage: connect to real API, gateway status banner, async booking submission
- New backend routes: paymentGateways, publicWidget
- YooKassa service: add createCharge() for immediate payment (online bookings)

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

src/lib/api.ts

@@ -1450,6 +1450,7 @@ export interface MinibarBookingCharge {
   itemName: string
   quantity: number
   pricePerUnit: number
+  currentPrice: number
   total: number
   recordedAt: string
   recordedByName: string | null
@@ -1553,6 +1554,7 @@ export interface DepositSettings {
   amount: number
   yookassaShopId: string | null
   yookassaSecretKey: string | null
+  releaseRequiresCheckout: boolean
   updatedAt?: string
 }
 
@@ -1561,6 +1563,7 @@ export interface DepositSettingsPayload {
   amount?: number
   yookassa_shop_id?: string
   yookassa_secret_key?: string
+  release_requires_checkout?: boolean
 }
 
 export interface BookingDeposit {