fix: 【所有分类】新增分类时无目录时应不能新增

src/pages/categoryManage/category/index.tsx

@@ -647,6 +647,7 @@ const Category: FC = (props: any) => {
             style={{ marginRight: '10px' }}
             onClick={() => addCayDailogShow()}
             icon={<PlusOutlined />}
+            disabled={tabList.length == 0}
           >
             新增分类
           </Button>