[BUG] Claude Code render badly in GNU Screen

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?

<img width="322" height="233" alt="Image" src="https://github.com/user-attachments/assets/13b0df4e-8d3f-4c7d-b3c5-7ab9c72e61d2" />

<img width="199" height="343" alt="Image" src="https://github.com/user-attachments/assets/14517aba-7157-4a2f-928e-272846daa74f" />

What Should Happen?

When using Claude Code inside GNU Screen it should display correctly

Error Messages/Logs

Steps to Reproduce

screen
claude

Claude Model

None

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.1.5

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

iTerm2

Additional Information

_No response_