[BUG] Korean IME input not working in TUI (SSH environment)

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?

Korean characters cannot be typed directly in Claude Code TUI.

What Should Happen?

Works fine in normal terminal but Only broken inside Claude Code

Error Messages/Logs

Steps to Reproduce

Environment: SSH via Termius and type Korean.

Claude Model

None

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.1.27

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Other

Additional Information

_No response_