Initial commit: X-Server Mobile enterprise tool system

- Frontend: React 18 + TypeScript + Vite + Ant Design Mobile
- Backend: PHP 8.5 + Webman 2.x + MySQL + Redis
- i18n support: Chinese, English, Russian, Spanish, French
- Approval workflow engine
- Docker development environment
- Feishu integration

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

backend/config/app.php

@@ -0,0 +1,11 @@
+<?php
+
+return [
+    'debug' => getenv('APP_DEBUG') ?: true,
+    'default_timezone' => 'Asia/Shanghai',
+    'request_class' => support\Request::class,
+    'public_path' => base_path() . '/public',
+    'runtime_path' => base_path() . '/runtime',
+    'controller_suffix' => 'Controller',
+    'controller_reuse' => true,
+];