feat:教师端服务学员列表搜索条件

mec-teacher/src/main/java/com/ym/mec/teacher/controller/ExtracurricularExercisesController.java

@@ -120,6 +120,9 @@ public class ExtracurricularExercisesController extends BaseController {
         Map<String, Object> result = new HashMap<>();
         List<BasicUserDto> dontServeStudents = extracurricularExercisesService.getDontServeStudents(sysUser.getId(), null, null, null, null);
         if(CollectionUtils.isEmpty(dontServeStudents)){
+            result.put("musicGroups", Collections.emptyList());
+            result.put("classGroups", Collections.emptyList());
+            result.put("subjects", Collections.emptyList());
             return succeed(result);
         }
         Set<Integer> studentIds = dontServeStudents.stream().map(BasicUserDto::getUserId).collect(Collectors.toSet());