fix: 学生端我购买的课程vip课上课模式错误

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

@@ -834,7 +834,7 @@ public class ClassGroupServiceImpl extends BaseServiceImpl<Integer, ClassGroup>
                 } else if (e.getOnlineClassesNum() <= 0 && e.getOffLineClassesNum() > 0) {
                     e.setClassMode(2);
                 } else {
-                    e.setClassMode(1);
+                    e.setClassMode(0);
                 }
             }
         }