Phase 0 of the panels redesign, extraction only, no behavior changes:
- Unify comments loading on PlayerState: loadComments/loadMoreComments
become the single loader, used by both the player sheet preload and
the comments overlay (which previously had its own duplicate copy).
- Extract PanelResizeGrabber from FloatingDetailsPanel into the new
Views/Player/Panels/ directory.
- Extract the shared queue list from QueueManagementSheet into
QueueListView plus QueuePlaybackActions, reused by the tvOS panel.
- Remove the no-op wideLayoutPanelAlignment accessor from the settings
view model; the player reads the panel side from SettingsManager, so
the preset field was dead. The Codable field stays so old presets
decode.
