[BUG] Shift+Enter regression - **AGAIN** - on version 2.1.113 - worked on 2.1.112

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?

The same bug I reported here: https://github.com/anthropics/claude-code/issues/39997 and here https://github.com/anthropics/claude-code/issues/40677 . It was fixed after those bug reports, but is now broken again on v 2.1.113. It still works on 2.1.112.

Seriously guys, you have heard of regression tests, right?

What Should Happen?

Shift + Enter should NOT submit the prompt. It should enter a newline.

Error Messages/Logs

Steps to Reproduce

Same as before in all the previous issues where this same bug continues to regress.

Claude Model

Opus

Is this a regression?

Yes, this worked in a previous version

Last Working Version

2.1.112

Claude Code Version

2.1.113

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

Windows Terminal

Additional Information

Please fix this, and PLEASE implement a regression test and verify this basic behavior on a Windows machine in Windows Terminal Preview.