feat(store): 门店详情核销记录走马灯

新增 GET /stores/:id/recent-redeems，C 端在门店详情区上方循环展示脱敏核销动态。

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

server/dukang-api/src/modules/redeem/redeem.service.ts

@@ -38,6 +38,15 @@ type TokenPayload = {
   allocations?: Array<{ couponId: string; amount: number }>;
 };
 
+/** C 端公示：用户138****5678 / 用户*** */
+function maskRedeemUserLabel(phone?: string | null): string {
+  const digits = String(phone || '').replace(/\D/g, '');
+  if (digits.length >= 7) {
+    return `用户${digits.slice(0, 3)}****${digits.slice(-4)}`;
+  }
+  return '用户***';
+}
+
 type PendingSnapshot = TokenPayload & {
   redeemType: 'DIRECT' | 'COUPON';
 };
@@ -1131,6 +1140,22 @@ export class RedeemService {
     };
   }
 
+  /** C 端门店详情走马灯：脱敏用户 + 时间 + 金额 */
+  async listPublicStoreRecentRedeems(storeId: bigint, limit = 20) {
+    const take = Math.min(Math.max(limit, 1), 50);
+    const list = await this.prisma.redeemRecord.findMany({
+      where: { storeId },
+      orderBy: { createdAt: 'desc' },
+      take,
+      include: { user: { select: { phone: true } } },
+    });
+    return list.map((r) => ({
+      userLabel: maskRedeemUserLabel(r.user?.phone),
+      amount: Number(r.amount),
+      createdAt: r.createdAt.toISOString(),
+    }));
+  }
+
   async submitRating(userId: bigint, body: { redeemRecordId: string; serviceScore: number; envScore: number }) {
     const record = await this.prisma.redeemRecord.findFirst({
       where: { id: BigInt(body.redeemRecordId), userId },

server/dukang-api/src/modules/store/store.controller.ts

@@ -12,7 +12,10 @@ import { CurrentUser } from '../../common/decorators/current-user.decorator';
 
 @Controller('stores')
 export class PublicStoreController {
-  constructor(private readonly storeService: StoreService) {}
+  constructor(
+    private readonly storeService: StoreService,
+    private readonly redeemService: RedeemService,
+  ) {}
 
   @Get()
   @UseGuards(OptionalJwtAuthGuard)
@@ -28,6 +31,24 @@ export class PublicStoreController {
     return this.storeService.listOpenStores(cityCode, userLat, userLng, { phone: viewerPhone });
   }
 
+  @Get(':id/recent-redeems')
+  @UseGuards(OptionalJwtAuthGuard)
+  async recentRedeems(
+    @CurrentUser() user: AuthUser | undefined,
+    @Param('id') id: string,
+    @Query('limit') limit?: string,
+  ) {
+    const viewerPhone = await this.resolveViewerPhone(user);
+    // 与详情同权：白名单门店对不可见用户返回空（不泄露存在核销）
+    try {
+      await this.storeService.getStore(BigInt(id), { phone: viewerPhone });
+    } catch {
+      return [];
+    }
+    const n = limit != null && limit !== '' ? Number(limit) : 20;
+    return this.redeemService.listPublicStoreRecentRedeems(BigInt(id), Number.isFinite(n) ? n : 20);
+  }
+
   @Get(':id')
   @UseGuards(OptionalJwtAuthGuard)
   async detail(@CurrentUser() user: AuthUser | undefined, @Param('id') id: string) {