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>

frontend/src/pages/login/index.tsx

@@ -0,0 +1,12 @@
+import styles from './login.module.css'
+
+export default function Login() {
+  return (
+    <div className={styles.login}>
+      <div className={styles.container}>
+        <h1>企业工具台</h1>
+        <button className={styles.feishuBtn}>飞书授权登录</button>
+      </div>
+    </div>
+  )
+}