Fix peripheral volume_muted state (#403)

Enable updating the `volume_muted` status when muting/unmuting the media player volume, and improve its tracking.

linux_voice_assistant/models.py

@@ -217,6 +217,7 @@ class ServerState:
             _LOGGER.debug("Skipping save - volume unchanged")
             return
 
+        previous_muted = self.volume == 0.0
         self.volume = clamped_volume
         self.preferences.volume = clamped_volume
         _LOGGER.info("Saving volume %s to %s", clamped_volume, self.preferences_path)
@@ -230,6 +231,10 @@ class ServerState:
 
             api.emit_event_sync(LVAEvent.VOLUME_CHANGED, {"volume": round(clamped_volume, 3)})
 
+            new_muted = clamped_volume == 0.0
+            if previous_muted != new_muted:
+                api.emit_event_sync(LVAEvent.VOLUME_MUTED, {"muted": new_muted})
+
     def persist_mic_gain(self, gain: float) -> None:
         """Persist the microphone auto gain value."""
         gain_int = int(gain)

linux_voice_assistant/peripheral_api.py

@@ -278,6 +278,7 @@ class PeripheralAPIServer:
                 "data": {
                     "muted": state.muted,
                     "volume": round(state.volume, 3),
+                    "volume_muted": state.volume == 0.0,
                     "ha_connected": state.connected,
                     "last_stt_text": self._last_stt_text,
                     "last_tts_text": self._last_tts_text,
@@ -659,6 +660,7 @@ class PeripheralAPIServer:
             LVAEvent.MEDIA_PLAYER_PLAYING,
             LVAEvent.DISCONNECTED,
             LVAEvent.PIPELINE_ERROR,
+            LVAEvent.VOLUME_MUTED,
         }
         if event in _STATE_EVENTS:
             self._current_state = event