The Apple scenes passed artLoader nil, so the store's library frames shipped
empty frosted cards next to Android's populated shelf. LibraryArtSource (a
two-method protocol the production LibraryArtLoader already satisfies) lets the
harness answer art from a canned source, and the four posters are drawn
procedurally at capture time — CoreGraphics on Apple, Canvas on Android, same
designs, same seeds — replacing Android's gradient-plus-monogram tiles. Nothing
is bundled; release builds ship none of it.