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First step of decoupling artist identity/storage/display. migration 0077 drops uq_artist_name so the display name is free text (two genuinely different creators can share a name); the slug stays the immutable, unique storage/identity key (the on-disk path component — untouched, so nothing moves). ArtistService.rename + PATCH /api/artists/<id> change the name ONLY. Frontend: inline pencil-edit on the artist header (mirrors TagCard), slug/route unaffected so no navigation. Fixes the operator's 'no surface to rename an artist' + the name-collision fragility. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01CDgx8bQS5YrGRK76v8HUnM