The ribbon feature relied on album.awards arriving on the frontend, but
the DiscoverAlbum Rust struct in both qbz-models and src-tauri/api was
missing the 'awards' field, so serde silently dropped it during
deserialization of /discover/index. Result: frontend always saw an
empty awards array and pickAlbumRibbon returned undefined.
Also bumps the home sessionStorage cache to schemaVersion 2 so pre-fix
caches (which persisted AlbumCardData without ribbon) are discarded on
next launch instead of rehydrating with missing fields.
cc
vicrodh
b738c27507