Three issues fixed:
1. Stale discography data from a previous Artists page search was used
instead of fetching for the current library artist. Now detects
library page context and forces fresh fetch when names differ.
2. Enhanced view may not be loaded, so metadata IDs (spotify/itunes/
deezer) are fetched from the enhanced endpoint on demand.
3. Fixed undefined spotifyId reference — now uses properly scoped
metadataArtistId variable.
Falls back to name-based search when no metadata IDs are available.
Better error message directs users to Artists page as alternative.
89b5178838
