The voice.toggle handler was persisting display.voice_enabled /
display.voice_tts to config.yaml, so a TUI session that ever turned
voice on would re-open with it already on (and the mic badge lit) on
every subsequent launch. cli.py treats voice strictly as runtime
state: _voice_mode = False at __init__, only /voice on flips it, and
nothing writes it back to disk.
Drop the _write_config_key calls in voice.toggle on/off/tts and the
config.yaml fallback in _voice_mode_enabled / _voice_tts_enabled.
State is now env-var-only (HERMES_VOICE / HERMES_VOICE_TTS), scoped to
the live gateway subprocess — the next launch starts clean.
44a0cbe525