[Enhancement]: Collapse/minimize for single screen workflow

### Before Requesting

- [x] I have searched the existing issues, and there is no existing issue for my feature request

### What feature do you want?

The chat window is always over fullscreen which works great when using multiple screens and makes sense in some sense when working on something, however it is also a little irritating and covers the IDE. and i can't tab to and from the editor to the copilot app easily.

sometimes it obscures the view, would be great with a minimize button that makes it collapse to just the toolbar, or a shortcut that hides it completely or something similar