[BUG] Sidebar overlay extends past sidebar

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

When I open the sidebar a black blank space projects past the sidebar which then lays over top of the main work screen. Doesn't matter if I resize it doesn't matter if I go fullscreen doesn't matter if I open and close it.

<img width="1680" height="1050" alt="Image" src="https://github.com/user-attachments/assets/c74e4959-a064-4fc5-919b-3dbced42cafd" />

What Should Happen?

The sidebar should not extend past where the sidebar actually is at least the overlay of it so there should be no extra black screen.

Error Messages/Logs

Steps to Reproduce

One open Claude Desktop go to the code section for me it's as simple as just opening the sidebar and then the black screen extends past the sidebar that's all I've had to do.

Claude Model

Not sure / Multiple models

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

1.3109.0.

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_