Add a Custom swatch to the appearance settings accent color grid,
backed by a hex value stored in settings (synced via iCloud like the
rest). iOS uses the native ColorPicker wheel; macOS uses a circular
swatch that opens NSColorPanel, since the SwiftUI color well looks out
of place among the circles. All accent consumers now read the resolved
color through SettingsManager.resolvedAccentColor.
The indigo preset is retired from the grid but kept in the enum, so
users who selected it keep their color until they pick another one.
Claude-Session: https://claude.ai/code/session_0154KH8RAVAvm6iVanhmoW8o
Comments now use DescriptionText.attributed so URLs become tappable
and route through the same in-app pipeline as description links, and
timestamp strings seek the player.
Reworks VideoInfoView on tvOS into a persistent 30% left sidebar
(thumbnail, title, channel, Play / Add to Playlist / Bookmark) with a
scrollable right pane for description, stats, comments, related, and
watch history. Reuses the player's TVScrollableDescription (refactored
to self-manage focus) so the description supports click-to-lock
scrolling, and the outer ScrollView is disabled while locked. Comments
full-screen on tvOS, with commenter avatars no longer tappable and
accent-colored link text replaced with the default foreground.
