fix: 移除 assets/ 到 CCSwitch 的路由，避免 OpenClaw 前端 JS/CSS 被拦截返回 401

fix: force_download in restore + debug endpoints + path fix

feat: /api/backup endpoint for manual backup trigger

security: remove password leaks from logs and debug endpoints

fix: route /assets/* to CCSwitch for frontend JS/CSS loading

fix: route CCSwitch API requests to port 3000 to bypass WebLoginDialog

fix: save gateway password to file for debug retrieval, add /debug/password endpoint

fix: use Python for port detection, add /debug diagnostic endpoint

修复: 过滤代理头，解决 OpenClaw Gateway 不信任 WebSocket 连接问题

修复: 改进 WebSocket 代理，添加详细日志

修复: 添加 WebSocket 支持，解决 OpenClaw UI 登录无响应问题

Update CC-Switch-Web: support env password CCSWITCH_PASSWORD