fix(library): multi-genre local index with track_genre and backfill (#1059)

* fix(library): multi-genre local index with track_genre and backfill

Restore atomic genre browse, filters, and counts via track_genre:
OpenSubsonic genres[] first with Navidrome-default split fallback, sync
write path, read-path query switches, blocking startup backfill with
progress, and v12 repair migration for DBs that recorded legacy 002–011.
TS fallback adds genreTagsFor and migration gate i18n across locales.

* fix(library): address multi-genre review — robust TS genres and scope join

genreTagsFor routes raw genres through parseItemGenres (single-object
Subsonic quirk and bare strings). Library-scoped genre browse/counts join
track for raw_json library_id fallback. Statistics keeps empty-genre bucket.

* docs: CHANGELOG and credits for multi-genre local index (PR #1059)

* docs(changelog): credit HiveMind on Discord for multi-genre report (PR #1059)

src/locales/nl/index.ts

@@ -42,6 +42,7 @@ import { deviceSync } from './deviceSync';
 import { orbit } from './orbit';
 import { tray } from './tray';
 import { licenses } from './licenses';
+import { migration } from './migration';
 
 export const nlTranslation = {
   sidebar,
@@ -88,4 +89,5 @@ export const nlTranslation = {
   orbit,
   tray,
   licenses,
+  migration,
 };

src/locales/nl/migration.ts

@@ -0,0 +1,15 @@
+export const migration = {
+  preparing: 'Gegevensupdate voorbereiden…',
+  preparingBody: 'Bibliotheek en analysecache controleren…',
+  migrating: 'Gegevens migreren',
+  working: 'bezig…',
+  skippedRows: 'Rijen van verwijderde servers zijn overgeslagen; oude back-up wordt na succesvolle switch verwijderd.',
+  failed: 'Migratie mislukt',
+  retry: 'Opnieuw',
+  copyDetails: 'Details kopiëren',
+  complete: 'Update voltooid',
+  completeRows: '{{count}} rijen gemigreerd',
+  genreTagsTitle: 'Genre-index bijwerken…',
+  genreTagsBody: 'Genres indexeren voor bladeren en filters. Eenmalig na de update.',
+  genreTagsFailed: 'Genre-index bijwerken mislukt',
+};