The pin now sits as an icon-only pill at the leading edge of the page
bar, before the page pills, instead of floating on the resize grabber.
It stays fixed while the pages scroll and fills with the accent color
while pinned. The page bar is kept visible when a pin action is present
even if only one page is available, so the control never disappears.
iPhone (floating-only) still shows no pin.
Removes PanelPinButton, which had no other users.
The corner layout side column puts a 12pt resize grabber strip before the
panel, and every page then added the standard 16pt horizontal padding, so
content sat ~28pt from the left edge but 16pt from the right.
Add a PanelHorizontalInsets environment value with a panelHorizontalPadding()
modifier that the info, comments, related and chapters pages use instead of
.padding(.horizontal). The side column trims the leading inset by the grabber
width so content is 16pt from the column's outer edge on both sides; other
hosts keep the defaults. Queue and tracks are List-backed and get the same
leading delta as a scroll content margin. The page bar follows the same insets
so the first pill lines up with the content.
Phase 1 of the player panels redesign:
- New PanelSettings model (pages, regions, layout mode, default
visibility) stored as an optional field on PlayerControlsLayout with
an effectivePanelSettings accessor; lenient Codable so future page
types and settings payloads never corrupt saved presets.
- New Views/Player/Panels content engine: PlayerPanelContentView
renders a page bar plus the selected page (info, comments, related,
chapters, queue, tracks), with runtime hiding of empty pages.
- PortraitDetailsPanel and FloatingDetailsPanel now host the shared
content instead of their duplicated info bodies; drag machinery,
pills, and fades are untouched.
- Comments list extracted into CommentsListContent shared by the
overlay and the comments page; comments pill routes to the comments
page (expanding the portrait panel) when the page is enabled, and
falls back to the overlay when it is not.
- Tracks page embeds QualitySelectorView via a new isEmbedded mode.
- Deleted the unused video info bodies in ExpandedPlayerSheet+VideoInfo
and the dead PlayerInfoTab model.
