[BUG] Chat window is partially hidden with greyspace that cut half the conversation text input

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?

Interface in unusable in some screensize because the conversation interface is partially hidden with empty space that serves no purpose. View Screenshot

<img width="813" height="785" alt="Image" src="https://github.com/user-attachments/assets/d9d9ff0d-98f0-4595-a58f-326a66db402a" />

What Should Happen?

Remove that empty space.

Error Messages/Logs

Steps to Reproduce

Open the chat on claude desktop app on a 16 pouces, 2019 macbook pro, make the window something like 1120px by 800px.

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

2.1.92 (Claude Code)

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_