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/redis.php

@@ -0,0 +1,10 @@
+<?php
+
+return [
+    'default' => [
+        'host' => getenv('REDIS_HOST') ?: 'redis',
+        'port' => getenv('REDIS_PORT') ?: 6379,
+        'password' => getenv('REDIS_PASSWORD') ?: null,
+        'database' => getenv('REDIS_DATABASE') ?: 0,
+    ],
+];