修改通识课搜索框bug，切换菜单项并清空搜索框

src/views/AIPage/AIGeneralCourse.vue

@@ -259,6 +259,9 @@ const handleMenuClick = (menu) => {
   currentOpenedMenu.value = menu.id
   saveActiveState(menu.id, menu.id)
   
+  // 清空搜索框内容
+  SearchInput.value = ''
+  
   // 如果该菜单下有课程数据，设置默认选中第一项
   if (menu.data && menu.data.length > 0) {
     currentActiveIndex.value = menu.id + '-1'
@@ -375,7 +378,8 @@ const querySearch = (queryString, cb) => {
     ? data.filter(item => {
         // 课程标题和序号查询
         return item.ctType.toLowerCase().includes(queryString.toLowerCase()) ||
-               item.ctTypeSort.includes(queryString)
+        // 类型检查，确保ctTypeSort是字符串类型
+               (item.ctTypeSort && item.ctTypeSort.toString().includes(queryString))
       })
     : data
   cb(results)
@@ -397,7 +401,8 @@ const filteredTitles = computed(() => {
   }
   return data.filter(title =>
     title.ctType.toLowerCase().includes(SearchInput.value.toLowerCase()) ||
-    title.ctTypeSort.includes(SearchInput.value)
+    // 类型检查，确保ctTypeSort是字符串类型
+    (title.ctTypeSort && title.ctTypeSort.toString().includes(SearchInput.value))
   )
 })