Each favorites tab is now its own history entry (NavEntry::Favorites{tab},
mirroring Discover) recorded from both the header nav and the in-view tab
bar, so back/forward moves between tabs instead of exiting Favorites. Add
the back/forward NavButtons at the same position as every other page
(11px top padding + 22px gap) — FavoritesView was the only view missing
it — and shrink the "Favorites" heading to Typography.section (the album
name size in AlbumView).
cc
vicrodh
21af0f63f8