refactor：用 AdminApiList 统一后台列表类接口的响应格式

app/Support/AdminUserApiPresenter.php

@@ -0,0 +1,26 @@
+<?php
+
+namespace App\Support;
+
+use App\Models\AdminUser;
+
+/** 管理员用户 API 中列表行 / 详情 / 变更成功后的统一 JSON 形状。 */
+final class AdminUserApiPresenter
+{
+    /** @return array<string, mixed> */
+    public static function listItem(AdminUser $user): array
+    {
+        $user->loadMissing('roles');
+
+        return [
+            'id' => (int) $user->id,
+            'username' => $user->username,
+            'nickname' => $user->name,
+            'email' => $user->email,
+            'status' => (int) $user->status,
+            'roles' => $user->adminRoleSlugs(),
+            'direct_permissions' => $user->directLegacyPermissionSlugs(),
+            'effective_permissions' => $user->adminPermissionSlugs(),
+        ];
+    }
+}