Persistent per-platform mode that plays only the audio track to save
bandwidth and speed up loads. When enabled, stream selection picks the
best audio-only stream (preferred language, codec, bitrate) and never
fetches the video URL; toggling mid-video reloads at the current
position using the quality-switch path (live vid=no toggling is avoided
due to A/V desync).
- Toggle row in the player quality/settings sheet on iOS, macOS and
tvOS, next to lock controls
- New audioMode control button type (red when active) for player
controls and mini player layouts
- Picking a video quality explicitly turns the mode off; audio track
picks keep it on and now work while audio-only is playing
- Stream URL refresh preserves audio-only playback instead of
resurrecting video
- Queue preloads and history entries resolved before a toggle are
discarded so selection re-runs with the current mode
- tvOS player shows the video thumbnail instead of a black screen
during audio-only playback
- PiP button hidden for audio-only streams
- Move Close to a top-right circular icon; bottom row reorganizes into
left (Settings/Info/Comments), center transport (Previous/PlayPause/Next),
and right (Queue) clusters with equal side frames so transport stays
geometrically centered.
- Introduce a circular icon-only `TVTransportButtonStyle` (primary variant
for Play/Pause) mirroring the new Close button look.
- Always render Previous/Next so Play/Pause position is fixed; dim and
disable when unavailable.
- Share `isTransportDisabled` on `PlayerState` and reuse it on iOS and
tvOS; apply it (plus symbol replace transition) to the tvOS Play/Pause
button.
Extract shared TimeInterval.formattedAsTimestamp replacing 8 identical
formatTime/formattedTime implementations across player views. Remove
unused currentTime parameter from GestureSeekPreviewView. Consolidate
duplicated geometry math in MacOSControlBar into seekPreviewPosition().
Extract chapter title from inside the storyboard preview into a
standalone ChapterCapsuleView with its own glass capsule background.
The capsule follows the seek position horizontally but independently
clamps to screen edges using alignmentGuide, allowing it to be wider
than the storyboard thumbnail without going offscreen.
Display a floating time pill above the seek bar during dragging
(iOS) and dragging/hovering (macOS) when video has no storyboard
thumbnails. Includes chapter name when available.
