[BUG] Editing agents messes up and shfit text rendering on CLI

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 access claude to edit agents rendering is trailing and i can't see/select the correct choice

What Should Happen?

<img width="902" height="920" alt="Image" src="https://github.com/user-attachments/assets/a072ae02-119a-4e0c-8792-5aab128bfc1b" />

Error Messages/Logs

text rendering is messed up that i move up and down it trails and i can't see or exit as the options are trailing behind and i had to force exit terminal

Steps to Reproduce

1. I invoked /agents
2. chose edit agent
3. chose edit in editor
4. text rendering is messed up

<img width="902" height="920" alt="Image" src="https://github.com/user-attachments/assets/c536880e-c9dc-4722-9c85-189895e99818" />

Claude Model

Sonnet (default)

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.0.28

Platform

Anthropic API

Operating System

Ubuntu/Debian Linux

Terminal/Shell

Xterm

Additional Information

Debian Linux Zorin OS 17.3 standard terminal on tmux and standard terminal without tmux