Two bugs from the source-artist click flow:
1. After the backend's library upgrade kicks in (clicking a Deezer
result for an artist you already own routes through the library
path), the response's data.artist.id is the library PK while
artistDetailPageState.currentArtistId still held the source id.
Toggling Enhanced view then fired
/api/library/artist/<source_id>/enhanced which 404'd because the
source id isn't a library PK.
loadArtistDetailData now updates currentArtistId from
data.artist.id whenever they differ — Enhanced view, completion
checks, server sync etc. all use the right id.
2. The Similar Artists section is part of the standard view and was
staying visible when Enhanced view toggled on. toggleEnhancedView
now hides #ad-similar-artists-section in the same flow that
hides .discography-sections.
77567a5eda