修复：UserController::show 返回格式改为 {status, data} 包装

- 匹配 Alpine.js fetchUser 期望的 data.status === 'success' 判断
- 这是双击用户名弹窗不显示的根本原因

app/Http/Controllers/UserController.php

@@ -41,6 +41,8 @@ class UserController extends Controller
 
         // 隐藏关键信息，只返回公开资料
         return response()->json([
+            'status' => 'success',
+            'data' => [
                 'username' => $user->username,
                 'sex' => $user->sex,
                 'headface' => $user->headface,
@@ -51,6 +53,7 @@ class UserController extends Controller
                 'qianming' => $user->qianming,
                 'sign' => $user->sign ?? '这个人很懒，什么都没留下。',
                 'created_at' => $user->created_at->format('Y-m-d'),
+            ],
         ]);
     }