[BUG] input field disappears after /model

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?

Switching models mid-session (from Opus for planning to Sonnet to building) led to the terminal UI losing the input field.

I used a separate Claude session to troubleshoot and apparently the input field disappearing after a /model switch is a known display glitch in Claude Code's terminal UI — the model switch causes a UI reinitialize that sometimes fails to redraw the input prompt.

#32467 might be a related issue since it's likely the same underlying TUI redraw problem, just triggered differently (model switching in my case).

<img width="732" height="473" alt="Image" src="https://github.com/user-attachments/assets/437c12b1-d0c0-41b3-9b73-8f1369df54ab" />

What Should Happen?

The terminal UI should look the same and the input field should persist after switching models.

Error Messages/Logs

Steps to Reproduce

1. switch models mid-session, from Opus to Sonnet using /model sonnet

Claude Model

Opus

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.1.77 (Claude Code)

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_