feat(M04-C): 完成续费换房与订单调整

backend/src/orders/pricing-repository.ts

@@ -54,9 +54,13 @@ export class PricingRepository {
   async reserve(input: QuoteInput & {
     userId: string;
     holdMinutes?: number;
+    allowedStoreIds?: string[] | null;
   }) {
     return this.transaction(async (connection) => {
       const room = await this.loadRoom(connection, input.tenantId, input.roomId, true);
+      if (input.allowedStoreIds && !input.allowedStoreIds.includes(String(room.storeId))) {
+        throw new PricingError('STORE_SCOPE_FORBIDDEN');
+      }
       await this.releaseExpired(input.tenantId, input.roomId, connection);
       await this.assertAvailable(connection, input, true);
       const isHoliday = await this.isHoliday(
@@ -108,6 +112,7 @@ export class PricingRepository {
       return {
         orderId,
         orderNo,
+        storeId: String(room.storeId),
         reservationId: String(reservationResult.insertId),
         holdMinutes,
         quote