feat(albums): compilation filter toggle in All Albums

Tri-state button (all / only compilations / hide compilations) in the
Albums page header, using the OpenSubsonic isCompilation tag from
Navidrome. Client-side filter via useMemo, no extra server calls.
Closes #65.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/locales/fr.ts

@@ -290,6 +290,12 @@ export const frTranslation = {
     yearTo: 'À',
     yearFilterClear: 'Effacer le filtre année',
     yearFilterLabel: 'Année',
+    compilationLabel: 'Compilations',
+    compilationOnly: 'Uniquement compilations',
+    compilationHide: 'Masquer compilations',
+    compilationTooltipAll: 'Tous les albums · clic : uniquement compilations',
+    compilationTooltipOnly: 'Uniquement compilations · clic : masquer compilations',
+    compilationTooltipHide: 'Compilations masquées · clic : tout afficher',
     select: 'Sélection multiple',
     startSelect: 'Activer la sélection multiple',
     cancelSelect: 'Annuler',