[BUG] CLAUDE CODE TUI Scrolling in PowerShell makes text unreadable

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?

Claude almost always gives answers that don't fit on a single screen. No problem. However, when I inevitably scroll back inside the PowerShell TUI, the input cursor is now jumped up to the scroll point, and subsequent input is done inside of and on top of existing text, making it unreadable.

What Should Happen?

The input position should not change, and indeed if I start typing it should jump the scroll down to the location of the input line. This is exacerbated by the fact that there is no "clear screen" command, only the command to clear conversation history, which defeats the purpose of wanting to continue the conversation.

Error Messages/Logs

No errors are generated

Steps to Reproduce

1. Run claude code TUI
2. Ask it a question to get a multi-screen answer
3. Scroll up to view previous text
4. Start typing to try to input a follow up prompt

Claude Model

Sonnet (default)

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.1.71

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

PowerShell

Additional Information

This would be slightly easier if a "cls" command existed to preserver conversation history but clear output screen.