feat: widget — room display mode toggle (by room / by category)

src/lib/api.ts

@@ -1634,6 +1634,17 @@ export interface WidgetRoom {
   amenities: string[]
   description: string
   photos: string[]
+  categoryId: string | null
+}
+
+export interface WidgetCategory {
+  id: string
+  name: string
+  description: string
+  amenities: string[]
+  photos: string[]
+  minPrice: number
+  maxGuests: number
 }
 
 export interface WidgetConfig {
@@ -1643,10 +1654,12 @@ export interface WidgetConfig {
   paymentEnabled: boolean
   currency: string
   rooms: WidgetRoom[]
+  categories: WidgetCategory[]
 }
 
 export interface WidgetBookingPayload {
-  roomId: string
+  roomId?: string
+  categoryId?: string
   checkIn: string
   checkOut: string
   guestName: string