feat(bookings): add transaction document uploads for bank payments

Add payment method selection (Cash/Bank) to booking details
Support uploading, downloading, and deleting transaction documents
Update database schema and API endpoints to handle file storage

shared/booking.ts

@@ -3,6 +3,7 @@ import type { AppLocale } from './i18n'
 export type BookingMode = string
 export type TicketType = string
 export type BookingStatus = 'pending' | 'confirmed'
+export type PaymentMethod = 'cash' | 'bank'
 
 export interface DinnerEvent {
   id: string
@@ -58,6 +59,8 @@ export interface PublicBooking {
   personInChargeId: string
   personInChargeName: string
   personInChargePhoneNumber: string
+  paymentMethod: PaymentMethod
+  transactionDocument: BookingTransactionDocument | null
   remark: string | null
   status: BookingStatus
   statusLabel: string
@@ -65,6 +68,14 @@ export interface PublicBooking {
   confirmedAt: string | null
 }
 
+export interface BookingTransactionDocument {
+  originalName: string
+  mimeType: string
+  size: number
+  uploadedAt: string
+  url: string
+}
+
 export interface ReceiptBooking {
   id: string
   receiptToken: string
@@ -170,6 +181,10 @@ export function isBookingStatus(value: string | null | undefined): value is Book
   return value === 'pending' || value === 'confirmed'
 }
 
+export function isPaymentMethod(value: string | null | undefined): value is PaymentMethod {
+  return value === 'cash' || value === 'bank'
+}
+
 export function getBookingStatusLabel(value: BookingStatus | string, label?: string | null, locale: AppLocale = 'en') {
   if (label && locale !== 'zh') {
     return label