feat(shop): 新增根据userId查询推荐人接口- 在控制器中增加 getByUserId 接口，支持通过 userId 查询推荐人信息- 优化服务层逻辑，查询时限定 level 为 1 的推荐关系

- 引入 ShopUserReferee 实体类以支持关联查询功能

src/main/java/com/gxwebsoft/shop/controller/ShopDealerRefereeController.java

@@ -1,6 +1,7 @@
 package com.gxwebsoft.shop.controller;
 
 import com.gxwebsoft.common.core.web.BaseController;
+import com.gxwebsoft.shop.entity.ShopUserReferee;
 import com.gxwebsoft.shop.service.ShopDealerRefereeService;
 import com.gxwebsoft.shop.entity.ShopDealerReferee;
 import com.gxwebsoft.shop.param.ShopDealerRefereeParam;
@@ -55,6 +56,13 @@ public class ShopDealerRefereeController extends BaseController {
         return success(shopDealerRefereeService.getByIdRel(id));
     }
 
+    @Operation(summary = "根据userId查询推荐人信息")
+    @GetMapping("/getByUserId/{userId}")
+    public ApiResult<ShopDealerReferee> getByUserId(@PathVariable("userId") Integer userId) {
+      // 使用关联查询
+      return success(shopDealerRefereeService.getByUserIdRel(userId));
+    }
+
     @PreAuthorize("hasAuthority('shop:shopDealerReferee:save')")
     @OperationLog
     @Operation(summary = "添加分销商推荐关系表")

src/main/java/com/gxwebsoft/shop/service/impl/ShopDealerRefereeServiceImpl.java

@@ -48,6 +48,7 @@ public class ShopDealerRefereeServiceImpl extends ServiceImpl<ShopDealerRefereeM
     public ShopDealerReferee getByUserIdRel(Integer userId) {
       ShopDealerRefereeParam param = new ShopDealerRefereeParam();
       param.setUserId(userId);
+      param.setLevel(1);
       return param.getOne(baseMapper.selectListRel(param));
   }