feat(tests): implement tests for app routes and settings component
feat(settings): enhance remove all playlists functionality with loading state
fix(imports): update import paths for EpgProgressPanelComponent and ExternalPlayerInfoDialogComponent
- 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.
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