feat(store): add store sortOrder and swipeable package gallery

Enable HQ-controlled store list ordering and horizontal multi-image browsing on package detail.

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

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

@@ -154,7 +154,7 @@ export class StoreService {
         category: true,
         coverResource: true,
       },
-      orderBy: { createdAt: 'desc' },
+      orderBy: [{ sortOrder: 'asc' }, { createdAt: 'desc' }],
     });
 
     const whitelistPhones = stores.some((s) => s.visibilityWhitelistEnabled)
@@ -172,6 +172,7 @@ export class StoreService {
       distanceMeters: number | null;
       latitude?: unknown;
       longitude?: unknown;
+      sortOrder?: number;
     };
 
     const items: StoreListItem[] = [];
@@ -190,13 +191,16 @@ export class StoreService {
       items.push({ ...mapped, distanceMeters });
     }
 
-    if (hasUser) {
-      items.sort((a, b) => {
+    items.sort((a, b) => {
+      const so = (a.sortOrder ?? 0) - (b.sortOrder ?? 0);
+      if (so !== 0) return so;
+      if (hasUser) {
         const da = a.distanceMeters ?? Number.POSITIVE_INFINITY;
         const db = b.distanceMeters ?? Number.POSITIVE_INFINITY;
         return da - db;
-      });
-    }
+      }
+      return 0;
+    });
 
     return serializeBigInt(items);
   }
@@ -268,7 +272,7 @@ export class StoreService {
     const stores = await this.prisma.store.findMany({
       where,
       include: { category: true, coverResource: true },
-      orderBy: { createdAt: 'desc' },
+      orderBy: [{ sortOrder: 'asc' }, { createdAt: 'desc' }],
     });
     return serializeBigInt(stores.map(mapStoreCompat));
   }