Completes the artist-detail unification. Source artists now land on
the same /artist-detail page as library artists (with the source-aware
backend endpoint from earlier this session handling the data fetch).
The inline Artists page is gone — artists.js deleted, #artists-page
HTML block removed, /artists URL aliases to /search.
Source-artist callsites re-migrated from selectArtistForDetail to
navigateToArtistDetail (search results, global widget, download
modal, Discover hero / Your Artists cards / artmap context / genre
deep-dive, watchlist artist detail).
Visual upgrade to standalone hero: added .artist-detail-hero-bg +
.artist-detail-hero-overlay (blurred image bg, dark gradient — same
treatment as the inline page). library.js sets the bg image when
loading an artist.
Library-only UI hidden via CSS for source artists (existing rules
from the previous commit cover Enhanced toggle, Status filter,
completion bars, enrichment coverage, Top Tracks sidebar, Radio /
Enhance buttons).
Final 2 helpers (lazyLoadArtistImages used by wishlist-tools,
showCompletionError used by completion checker) moved from
artists.js into shared-helpers.js. The inline-page candidate set
was dropped from _resolveSimilarArtistsTargets.
init.js: 'artists' alias added at top of navigateToPage (same
pattern as the existing 'downloads' alias). 'case artists:' handler
removed from loadPageData. _getPageFromPath now maps artist-detail
to library as its parent (matches the existing nav highlight at
init.js:2161).
tests/test_script_split_integrity.py: artists.js removed from
SPLIT_MODULES; KNOWN_CROSS_FILE_DUPES updated to point escapeHtml
at shared-helpers.js instead of artists.js. 354/354 tests pass.
Net delta: -1700 lines.
Stays at 2.39. Once you've verified end-to-end (library artist ->
hero looks like inline visual; source artist from Search -> same
page, similar artists works, no 404s; /artists URL -> /search), a
follow-up commit bumps to 2.40 with the full WHATS_NEW entry that's
already prepped.
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