The hero-era loading machinery survived the hero-flight revert: the
loading scaffold rendered the real cover, _RouteSettled deferred the
swap until the push transition ended, and SkeletonCrossfade faded
between the two. The loaded header decodes the cover under a different
mem-cache key (viewport-sized vs full-res), so opening an album from
the artist screen flashed the cover: shown, blanked, shown again.
Restore the pre-hero flow: shimmer skeleton while loading, hard cut to
AlbumScreen so the cover appears exactly once. Removes the now-unused
_AlbumLoadingScaffold and three imports that only existed for it.
zarzet
bd6e2b4472