[BUG] Voice mode spacebar does not trigger recording

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?

After enabling voice mode with /voice, holding spacebar does not trigger push-to-talk recording. Spacebar types a literal space character instead. There is no visual feedback (recording indicator, waveform, status change) when holding spacebar.

What Should Happen?

Holding spacebar with voice mode enabled should show a recording indicator and capture audio for transcription.

Error Messages/Logs

No error messages. Feature silently fails.

Steps to Reproduce

1. Start Claude Code in iTerm.app (technically iTerm2)
2. Run /voice to enable voice mode (output confirms "Voice mode enabled")
3. Ensure input field is empty
4. Hold spacebar
5. Observe: space character is typed, no recording indicator appears

Claude Model

Opus

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.1.74

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

iTerm2

Additional Information

Note iTerm2 version: 3.6.9 / zsh