[BUG] claude desktop v 1.2773.0 bug

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?

the sidebar is overlaying the main content instead of pushing it aside, leaving a black gap and clipping the left edge of all messages.

What Should Happen?

the main content shows in full without clipping when side bar shown.

Error Messages/Logs

Steps to Reproduce

1. run claude desktop version 1.2773.0
2. select claude code
3. select new task or any existing task

Claude Model

Sonnet (default)

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

1.2773.0

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_