Task 8's ignore/restore/ignore-singles actions live on the artist detail
page, but the dashboard rendered artist names as plain text with no link,
making those actions unreachable through normal UI navigation. Wrap the
name in an anchor to /artist/{id} and assert the link in the dashboard test.
- Fix duplicate Telegram notifications: SyncArtistDiscography no longer wipes
notifications_sent for the whole artist on every cache-miss re-sync; only
markers for releases that disappear are pruned (FK-safe via INSERT OR REPLACE
+ rgid NOT IN (...)).
- Cache empty MusicBrainz discographies via a new artist_settings.last_synced
column (migration 009) so zero-release artists honor the TTL instead of being
re-fetched every cycle.
- Wire the Web UI server and Telegram notifier scheduler into main.run/NewApp.
- Guard startPeriodicSync against overlapping syncs with a done-channel slot.
- Add server.public_url config; NewServerWithConfig derives reachable links
and no longer advertises the 0.0.0.0 bind address.
- Web handlers: use scanner.ScanArtist per artist, drop always-false
releaseIgnored lookup and dead endsWith, thread configured threshold.
- Limit :memory: DB pool to one connection so migrations and queries share the
same in-memory store.
Implements Task 8: artist detail page (local albums + found-missing
with ignore buttons), ignored-releases archive with restore, and POST
handlers toggling ignore flags and ignore_singles. Adds ErrArtistNotFound
sentinel so callers can distinguish missing artists, and wires routes via
the enhanced ServeMux path wildcard.
