Voice push-to-talk regression in v2.1.83: space bar passes through to terminal while listening, no voice detected

Description

After updating from v2.1.81 to v2.1.83, space bar push-to-talk no longer works correctly.

Steps to Reproduce

1. Enable voice mode with /voice
2. Hold the space bar to record

Expected Behavior

Space bar is captured exclusively by voice mode, microphone records audio, and speech is transcribed on release.

Actual Behavior

• "Listening" indicator appears at the bottom (voice mode is triggered)
• Space bar simultaneously passes through to the terminal, moving the cursor forward
• On release, "no voice detected" is shown — no audio is captured

This appears to be a regression introduced by the fix in v2.1.83: "Fixed space key being swallowed for up to 3 seconds after releasing voice hold-to-talk" — the fix seems to have caused space to no longer be exclusively captured by voice mode.

Workaround

Rebinding push-to-talk to meta+k in ~/.claude/keybindings.json avoids the conflict.

Environment

• Claude Code version: 2.1.83
• OS: macOS
• Terminal: iTerm2 (Left Option key set to Esc+)
• Started with: v2.1.83 update (was working fine on v2.1.81)