So in the current PR that
@millions-afternoon-47582 is reviewing I address this. The left drawer, when open is full screen at smaller breakpoints, and user clicks a back button to return to chat. It's a better experience than the bottom arranged right drawer.
You can pull and test drive it here:
https://github.com/OpenHands/agent-canvas/pull/623
It needs some more work but it's an improvement I think.