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/app/middleware/CorsMiddleware.php

@@ -0,0 +1,27 @@
+<?php
+
+namespace App\Middleware;
+
+use Webman\Http\Request;
+use Webman\Http\Response;
+
+class CorsMiddleware
+{
+    public function process(Request $request, callable $handler): Response
+    {
+        // 处理 OPTIONS 预检请求
+        if ($request->method() === 'OPTIONS') {
+            $response = response('');
+        } else {
+            $response = $handler($request);
+        }
+
+        // 添加 CORS 头
+        $response->withHeader('Access-Control-Allow-Origin', '*')
+            ->withHeader('Access-Control-Allow-Methods', 'GET, POST, PUT, DELETE, OPTIONS')
+            ->withHeader('Access-Control-Allow-Headers', 'Content-Type, Authorization')
+            ->withHeader('Access-Control-Max-Age', '86400');
+
+        return $response;
+    }
+}