cdn change to local and use markdown and style change

Html/apps/static/js/teacher_course_setting.js

@@ -450,6 +450,7 @@ async function persistOrderNow(chapters) {
     });
     if (!res.ok) throw new Error('保存新顺序失败');
     console.log('已保存顺序')
+    console.log(payload);
   } catch (err) {
     console.error(err);
   }