- Add ComboBox for ringtone selection in Call Settings
- Convert MKV ringtones to WAV format (Linphone only supports WAV)
- Fix ComboSetting to support dialPlan type for international prefix
- Disable account devices feature to prevent API errors
- Disable automatic update check on startup
- Add ringtone fallback to default when custom file not found
- Fix ringtone dropdown to not override setting on initialization
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
