feat(settings): audio output device picker (labels, OS default, live refresh) (#173)

* feat(settings): clearer audio device labels for duplicate ALSA names

Show HDMI outputs as "Card (HDMI n)" from hdmi:DEV indices; include PCM and
optional subdevice for hw/plughw/sysdefault; label other ALSA plugins with
iface and PCM. When labels still collide, append a structured hint
(iface · card · PCM) instead of only truncating the raw device string.

* feat(settings): improve audio output device picker

Parse ALSA-style ids into clearer labels (HDMI with DEV index, PCM/subdevice
for hw/plughw/sysdefault). Disambiguate colliding labels; share stderr
suppression for Linux device enumeration.

Add audio_default_output_device_name and tag the matching list entry as the
current system output (i18n). While the Audio tab is open, refresh list and
mark on audio:device-changed and audio:device-reset without toggling the
refresh spinner. Show an error toast if listing devices fails.

src/locales/en.ts

@@ -505,6 +505,8 @@ export const enTranslation = {
     audioOutputDeviceDesc: 'Select which audio device Psysonic plays through. Changes take effect immediately and restart the current track.',
     audioOutputDeviceDefault: 'System Default',
     audioOutputDeviceRefresh: 'Refresh device list',
+    audioOutputDeviceOsDefaultNow: 'current system output',
+    audioOutputDeviceListError: 'Could not load the audio device list.',
     hiResTitle: 'Native Hi-Res Playback',
     hiResEnabled: 'Enable native hi-res playback',
     hiResDesc: "Forces 44.1 kHz output by default for maximum stability. Enable only if your hardware and network reliably support high sample rates (88.2 kHz+).",