feat: add external playback support and UI enhancements

- Integrated external playback functionality in category and detail views.
- Updated styles for play buttons to reflect different states (idle, launching, stop).
- Enhanced episode cards to indicate launching and active external playback states.
- Added new computed properties for managing external playback session states.
- Improved user interface for playback buttons with dynamic labels and icons based on playback state.
- Introduced new settings option to show external playback status bar on desktop.
- Updated translations for new features and UI elements.

apps/web/src/app/settings/settings.component.ts

@@ -161,6 +161,7 @@ export class SettingsComponent implements OnInit, OnDestroy {
         streamFormat: StreamFormat.M3u8StreamFormat,
         language: Language.ENGLISH,
         showCaptions: false,
+        showExternalPlaybackBar: true,
         theme: Theme.LightTheme,
         mpvPlayerPath: '',
         mpvReuseInstance: false,