feat(store): add two-level store categories for admin and partner open-store

Admin CRUD under stores menu; partner picks leaf category on create.
Default sync only inserts missing rows and never updates existing ones.

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

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

@@ -1,5 +1,6 @@
 import { Body, Controller, Get, Param, Post, Put, Query, UseGuards } from '@nestjs/common';
 import { StoreService } from './store.service';
+import { StoreCategoryService } from './store-category.service';
 import { RedeemService } from '../redeem/redeem.service';
 import { JwtAuthGuard, AuthUser } from '../../common/guards/jwt-auth.guard';
 import { PartnerPrimaryGuard } from '../../common/guards/partner-primary.guard';
@@ -23,6 +24,17 @@ export class PublicStoreController {
   }
 }
 
+@Controller('partner/store-categories')
+@UseGuards(JwtAuthGuard)
+export class PartnerStoreCategoriesController {
+  constructor(private readonly categories: StoreCategoryService) {}
+
+  @Get()
+  list() {
+    return this.categories.listTree({ includeDisabled: false, ensure: true });
+  }
+}
+
 @Controller('partner/stores')
 @UseGuards(JwtAuthGuard)
 export class PartnerStoreController {