Left panel margin too large, chat area becomes invisible

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 left panel's margin is abnormally large, making the chat area invisible.

What Should Happen?

メニューバー付近にカーソルを合わせると起こる

Error Messages/Logs

Steps to Reproduce

Description

The left panel's margin is abnormally large, making the chat area invisible.

Environment

• Version: 1.4758.0 (fb266c)
• OS: macOS
• Install method: Desktop app (.dmg)

Steps to reproduce

(再現手順があれば追加してください)

Expected behavior

Chat area should be visible normally.

Actual behavior

Left panel takes up too much space and chat area disappears.

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

1.4758.0

Claude Code Version

1.4758.0

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

<img width="731" height="830" alt="Image" src="https://github.com/user-attachments/assets/c565328f-0b67-4976-9502-8fc9579447eb" />