feat(ops): show redeem records on benefit coupon detail

Reuse the same coupon redeem trace as order detail (primary/secondary, allocations).

Co-authored-by: Cursor <cursoragent@cursor.com>

server/dukang-api/src/modules/ops/admin-benefit.service.ts

@@ -5,6 +5,7 @@ import { serializeBigInt } from '../../common/decorators/current-user.decorator'
 import { buildBenefitLedgerEvent, benefitLedgerWhere } from '../../common/event/event.helpers';
 import { mapBenefitLedgerCompat } from '../../common/compat/v31-compat';
 import { BenefitService } from '../benefit/benefit.service';
+import { AdminRedeemService } from './admin-redeem.service';
 import type { AdminBenefitCouponsQueryDto, AdminBenefitLedgersQueryDto } from './dto/admin-query.dto';
 import type { AdminBenefitGrantDto } from './dto/admin-mutate.dto';
 
@@ -13,6 +14,7 @@ export class AdminBenefitService {
   constructor(
     private readonly prisma: PrismaService,
     private readonly benefitService: BenefitService,
+    private readonly adminRedeemService: AdminRedeemService,
   ) {}
 
   async listCoupons(query: AdminBenefitCouponsQueryDto) {
@@ -45,16 +47,23 @@ export class AdminBenefitService {
       include: {
         user: { select: { id: true, userNo: true, phone: true, nickname: true } },
         order: { select: { id: true, orderNo: true, status: true, payAmount: true } },
-        redeemRecords: { orderBy: { createdAt: 'desc' }, take: 10, include: { store: { select: { id: true, name: true } } } },
       },
     });
     if (!coupon) throw new NotFoundException('权益券不存在');
-    const ledgers = await this.prisma.commonEvent.findMany({
-      where: benefitLedgerWhere(undefined, id),
-      orderBy: { createdAt: 'desc' },
-      take: 20,
+    const [ledgers, redeemTrace] = await Promise.all([
+      this.prisma.commonEvent.findMany({
+        where: benefitLedgerWhere(undefined, id),
+        orderBy: { createdAt: 'desc' },
+        take: 20,
+      }),
+      this.adminRedeemService.buildCouponRedeemTrace(coupon),
+    ]);
+    return serializeBigInt({
+      ...coupon,
+      ledgers,
+      redeemSummary: redeemTrace.redeemSummary,
+      redeemRecords: redeemTrace.redeemRecords,
     });
-    return serializeBigInt({ ...coupon, ledgers });
   }
 
   async voidCoupon(id: bigint) {