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

server/api/public/seats/[token].get.ts

@@ -0,0 +1,23 @@
+import type { PublicSeatReceipt } from '~~/shared/booking'
+
+import { getSeatReceiptBySeatToken } from '../../../utils/booking-repository'
+import { buildAppUrl } from '../../../utils/app-url'
+import { getRequiredRouteParam, httpError } from '../../../utils/http'
+
+export default defineEventHandler(async (event): Promise<PublicSeatReceipt> => {
+  const token = getRequiredRouteParam(event, 'token', 'Seat token')
+  const receipt = await getSeatReceiptBySeatToken(token)
+
+  if (!receipt) {
+    httpError(404, 'Seat ticket not found')
+  }
+
+  return {
+    booking: receipt.booking,
+    receiptUrl: buildAppUrl(event, `/receipt/${receipt.booking.receiptToken}`),
+    seat: {
+      ...receipt.seat,
+      seatUrl: buildAppUrl(event, `/seat/${receipt.seat.seatToken}`)
+    }
+  }
+})