new function suggest.

Thanks to the author for developing this terminal, the use is no worse than the commercial SecureCRT,xshell software. Can two features be added in later versions?
Can you add a session sidebar to hide it, so that the session sidebar is hidden, the mouse slides to the sidebar, the session shows, the mouse moves away, the session is hidden.
In addition, can you modify the trigger rule? If there is a matching rule, the command to be executed is executed only once instead of repeatedly. Enter the command to be executed only once when logging in to the machine. For example, export LANG=en_US is executed only once when logging in to the machine.

No files, tests, or entry points are named. Start by locating the session-sidebar UI and trigger-rule handling, then determine how login commands are processed. Done means the sidebar hides and reappears on hover, and a matching trigger command runs only once per login.

Written by the indexing model from the issue text.