[FEATURE]:Statusline should reflect current working directory when changed via cd

Feature hasn't been suggested before.

• I have verified this feature I'm about to request hasn't been suggested before.

Describe the enhancement you want to request

Body:
In the TUI, the statusline displays the working directory, but it only shows the directory where opencode was launched. When using cd (via !cd

) to change the current working directory, the statusline is not updated to reflect the new path.
Steps to reproduce:

1. Launch opencode in /some/project
2. Run !cd ~/Downloads
3. The statusline still shows /some/project instead of /Users/jinghuayao/Downloads
   Expected behavior:
   The statusline should update to show the current working directory after cd commands.
   Suggestion:
   Add an option in tui.json or the command palette to control whether the statusline updates dynamically. Additionally, it would be useful if the statusline path entry were clickable or customizable.