feat:增加删除修改关卡及阶段并自动刷新列表

src/views/courselibrary/CoursewareManage.vue

@@ -458,7 +458,7 @@
                         alt=""
                       />
                     </div>
-                    <span style="margin-right: 14px">内容分类</span>
+                    <span style="margin-right: 14px">课程分类</span>
                   </div>
                   <div class="item_inp">
                     <div class="select i6_input">
@@ -1738,7 +1738,7 @@ const columns1 = [
     },
   },
   {
-    title: "内容分类",
+    title: "课程分类",
     width: 130,
     dataIndex: "content",
     key: "1",
@@ -3438,10 +3438,6 @@ courseownervisible:false,
       },
     ]);
     const options2 = ref([
-      {
-        value: "value2",
-        label: "请选择内容分类",
-      },
       {
         value: "leadership",
         label: "领导力",