fix(user): 添加参数验证防止空类型查询

- 在xfb_list方法中添加type参数必填验证
- 当type参数为空时返回参数错误提示
- 避免因缺少必要参数导致的潜在查询异常

app/controller/api/user/User.php

@@ -628,6 +628,9 @@ class User extends BaseController
     public function xfb_list()
     {
         $type = $this->request->param('type');
+        if (!$type) {
+            return app('json')->fail('参数错误');
+        }
         [$page, $limit] = $this->getPage();
         $uid = $this->request->uid();
         $where['uid'] = $uid;