1、提交作业添加限制；

2、服务指标；
3、怎加课外训练待布置学员列表；
4、恢复网管课与乐团课的冲突检测逻辑

mec-biz/src/main/java/com/ym/mec/biz/service/impl/PracticeGroupServiceImpl.java

@@ -1793,7 +1793,7 @@ public class PracticeGroupServiceImpl extends BaseServiceImpl<Long, PracticeGrou
         SysUser sysUser = sysUserFeignService.queryUserById(practiceGroup.getStudentId());
 
         practiceGroup.setCoursesStartDate(allCourseDates.get(0));
-        practiceGroup.setCoursesExpireDate(courseExpireDate);
+        practiceGroup.setCoursesExpireDate(allCourseDates.get(3));
         Teacher teacher = teacherService.getDetail(practiceGroup.getUserId());
         if (Objects.isNull(teacher)) {
             throw new BizException("老师不存在");