fix(observer): 修复 UserObserver 调用 private 方法 authInfo() 的错误

将 User::authInfo() 改为 User::userid()，因为 authInfo() 是 private 方法，
Observer 无法访问。userid() 是 public 方法，内部会正确调用 authInfo()。

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Co-Authored-By: Claude <noreply@anthropic.com>
Co-Authored-By: Happy <yesreply@happy.engineering>

app/Observers/UserObserver.php

@@ -99,8 +99,8 @@ class UserObserver extends AbstractObserver
 
         if (!empty($changedFields)) {
             // 判断是用户自己修改还是管理员修改
-            $currentUser = User::authInfo();
-            $eventType = ($currentUser && $currentUser->userid === $user->userid)
+            $currentUserid = User::userid();
+            $eventType = ($currentUserid > 0 && $currentUserid === $user->userid)
                 ? 'profile_update'
                 : 'admin_update';
             Apps::dispatchUserHook($user, 'user_update', $eventType, $changedFields);