- Source endpoint now streams artists/albums/tracks as separate NDJSON
lines as each search type completes — iTunes users see artists in ~3s
instead of waiting 9+ seconds for all 3 rate-limited calls to finish
- Enhanced search _fetchAlternateSource reads stream with ReadableStream
reader, merges each chunk into source data, re-renders tabs immediately
- Global search uses same streaming pattern via _gsFetchSourceStream
- No data loss: streamed data merges incrementally, primary response
preserves already-received alternate source data
1bb59f3c24
