希望使用隧道，不必一直保持回话打开状态

希望使用隧道，不必一直保持会话打开状态 或者可以设置隧道是否一直打开，希望不受会话的影响。

另外，隧道有些慢，其他工具使用隧道，响应时间1s以内，WindTerm耗时2s~3s, 而且容易卡死

No files, tests, or entry points are named. Start by tracing how tunnel lifetime depends on the session and how tunnel requests are handled, then measure the reported latency and freezes. Done means a tunnel can remain open independently when configured and its responsiveness is improved without session closure.

Written by the indexing model from the issue text.