[BUG] AskUserQuestion "Other" text input doesn't work properly with Japanese IME

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?

When Claude uses the AskUserQuestion tool, the "Other" free-text input field at the bottom of the choices does not handle Japanese IME (Input Method Editor) input correctly. Kanji conversion is difficult or fails, making it nearly impossible for Japanese users to type a custom response.

What Should Happen?

Japanese IME input should work normally in the "Other" text field, just like in the main chat input.

Error Messages/Logs

Steps to Reproduce

1. Start a Claude Code session on macOS with Japanese input enabled
2. Trigger a situation where Claude uses AskUserQuestion with predefined options
3. Select "Other" and try to type Japanese text with IME conversion (e.g., type "かくにん" and convert to "確認")
4. IME conversion does not work as expected

Claude Model

None

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.1.49 (Claude Code)

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

Installed via native installer (not Homebrew).
Path: ~/.local/bin/claude