chore: remove unused start_proxy_with_takeover command

- Remove command registration from lib.rs
- Add comment clarifying failover queue is preserved on proxy stop

src-tauri/src/lib.rs

@@ -658,7 +658,6 @@ pub fn run() {
             commands::get_auto_launch_status,
             // Proxy server management
             commands::start_proxy_server,
-            commands::start_proxy_with_takeover,
             commands::stop_proxy_with_restore,
             commands::get_proxy_takeover_status,
             commands::set_proxy_takeover_for_app,

src-tauri/src/services/proxy.rs

@@ -538,6 +538,7 @@ impl ProxyService {
             .await
             .map_err(|e| format!("重置健康状态失败: {e}"))?;
 
+        // 注意：不清除故障转移队列和开关状态，保留供下次开启代理时使用
         log::info!("代理已停止，Live 配置已恢复");
         Ok(())
     }