将所有主要逻辑代码迁移到extend中，并在service中注册调用；

app/service.php

@@ -2,18 +2,10 @@
 
 declare(strict_types=1);
 
-use think\migration\Service;
+use think\UlthonAdminService;
 
-$service_default = [
-    0 => 'think\\captcha\\CaptchaService',
-    1 => 'think\\app\\Service',
-    2 => Service::class,
+$service = [
+    10 => UlthonAdminService::class,
 ];
 
-$service_common = include_once __DIR__ . '/common/app/service.php';
-
-$service = array_merge($service_default, $service_common);
-
-ksort($service);
-
 return $service;