更新字数提示

src/teacher/live-class/create-components/course-plan.tsx

@@ -55,6 +55,7 @@ export default defineComponent({
                   placeholder="请输入课程计划"
                   rows="3"
                   maxlength={200}
+                  showWordLimit
                   autosize
                   rules={[{ required: true, message: '请输入课程计划' }]}
                   type="textarea"

src/teacher/live-class/create-components/course.tsx

@@ -114,6 +114,7 @@ export default defineComponent({
               placeholder="请输入课程介绍"
               rows="3"
               maxlength={200}
+              showWordLimit
               autosize
               rules={[{ required: true, message: '请输入课程介绍' }]}
               type="textarea"

src/teacher/video-class/class-info.tsx

@@ -130,6 +130,7 @@ export default defineComponent({
               placeholder="请输入课程介绍"
               rows="3"
               maxlength={200}
+              showWordLimit
               autosize
               rules={[{ required: true, message: '请输入课程介绍' }]}
               type="textarea"