feat(bookings): implement ticket receipts and seat sharing system

Add receipt tokens and booking_seats table to track individual tickets
Create receipt and seat view pages with QR code generation

shared/booking.ts

@@ -2,6 +2,11 @@ export type BookingMode = 'table' | 'pax'
 export type TicketType = 'vip' | 'supporter'
 export type BookingStatus = 'pending' | 'confirmed'
 
+export const DINNER_EVENT_TITLE = 'DAP JOHOR 60th Anniversary Celebration'
+export const DINNER_EVENT_DATE_LABEL = 'Saturday, 30 May 2026'
+export const DINNER_EVENT_TIME_LABEL = '6:30 PM'
+export const DINNER_EVENT_VENUE = "Yong Peng's Chee Ann Kor"
+
 export const BOOKING_MODE_OPTIONS = [
   {
     value: 'table',
@@ -31,6 +36,7 @@ export const BOOKING_TICKET_CATALOG = [
 export interface PublicBooking {
   id: string
   confirmationToken: string
+  receiptToken: string
   customerName: string
   customerPhone: string
   bookingMode: BookingMode
@@ -47,6 +53,49 @@ export interface PublicBooking {
   confirmedAt: string | null
 }
 
+export interface ReceiptBooking {
+  id: string
+  receiptToken: string
+  customerName: string
+  customerPhone: string
+  bookingMode: BookingMode
+  quantity: number
+  seatCount: number
+  ticketType: TicketType
+  unitPrice: number
+  totalPrice: number
+  status: BookingStatus
+  createdAt: string
+  confirmedAt: string | null
+}
+
+export interface PublicBookingSeat {
+  id: string
+  seatNumber: number
+  seatToken: string
+  recipientName: string | null
+  recipientPhone: string | null
+  sharedAt: string | null
+  createdAt: string
+  updatedAt: string
+}
+
+export interface PublicBookingSeatWithUrl extends PublicBookingSeat {
+  seatUrl: string
+}
+
+export interface PublicBookingReceipt {
+  booking: ReceiptBooking
+  receiptUrl: string
+  seats: PublicBookingSeatWithUrl[]
+}
+
+export interface PublicSeatReceipt {
+  booking: ReceiptBooking
+  seat: PublicBookingSeatWithUrl
+  receiptUrl: string
+}
+
 export interface BookingCapacitySettings {
   totalTables: number | null
   updatedAt: string | null
@@ -109,6 +158,10 @@ export function formatBookingCurrency(value: number) {
   }).format(value)
 }
 
+export function getSeatLabel(seatNumber: number) {
+  return `Seat ${seatNumber}`
+}
+
 export function calculateBookingInventorySummary(
   bookings: Pick<PublicBooking, 'bookingMode' | 'quantity' | 'seatCount' | 'status'>[],
   settings: BookingCapacitySettings