Voice mode doesn't initialize on session start when state persists from previous session

Description

When starting a new Claude Code session, /voice (hold-Space-to-record) doesn't work until toggled off and back on. The audio capture subsystem doesn't reinitialize on startup even though the voice mode state persists as "on" from the previous session.

Steps to Reproduce

1. Enable voice mode with /voice in a session
2. Use voice input normally (hold Space to record)
3. End the session
4. Start a new Claude Code session
5. Try holding Space to record — nothing happens

Workaround

Run /voice twice:

• First /voice → "Voice mode disabled" (toggles stale state off)
• Second /voice → "Voice mode enabled. Hold Space to record." (properly initializes)

After this, hold-Space-to-record works normally.

Expected Behavior

Either:

1. Voice mode should fully initialize on session start when persisted state is "on" (i.e., the audio listener should start automatically), or
2. Voice mode state should not persist across sessions, requiring a fresh /voice each time

Environment

• macOS (Darwin 25.3.0, Apple Silicon)
• Claude Code CLI