新增展示积分明细的接口

tuoheng-api/src/main/java/com/tuoheng/api/service/impl/UserPointsDetailServiceImpl.java

             }else{
                 userPointsDetail1.setPointsChange(-1 * userPointsDetail.getPointsChange());
             }
+            userPointsDetailResult.add(userPointsDetail1);
         }
-        return null;
+        return JsonResult.success(userPointsDetailResult);
     }
 }