Voice mode (hold Space) does not activate in Ghostty terminal

Description

Voice mode (hold Space to talk) does not work when running Claude Code in Ghostty terminal (xterm-ghostty). Pressing and holding Space just types a space character instead of activating voice input.

Environment

• Claude Code version: 2.1.83
• Terminal: Ghostty (TERM=xterm-ghostty)
• OS: macOS 26.3.1 (Darwin 25.3.0)
• Shell: zsh

Steps to reproduce

1. Open Ghostty terminal
2. Run claude (no flags)
3. On empty input line, press and hold Space
4. Expected: voice mode activates
5. Actual: space character is typed into the input

Notes

• Voice mode works correctly in some existing terminal sessions but not in newly opened ones
• Happens regardless of launch method (claude, claude --dangerously-skip-permissions, via cmux)
• Not related to tmux/zellij — happens in plain Ghostty window
• The /remote-control feature does activate in these sessions, unclear if related