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/es.ts

@@ -291,6 +291,12 @@ export const esTranslation = {
     yearTo: 'Hasta',
     yearFilterClear: 'Limpiar filtro de año',
     yearFilterLabel: 'Año',
+    compilationLabel: 'Recopilatorios',
+    compilationOnly: 'Solo recopilatorios',
+    compilationHide: 'Ocultar recopilatorios',
+    compilationTooltipAll: 'Todos los álbumes · clic: solo recopilatorios',
+    compilationTooltipOnly: 'Solo recopilatorios · clic: ocultar recopilatorios',
+    compilationTooltipHide: 'Recopilatorios ocultos · clic: mostrar todo',
     select: 'Selección múltiple',
     startSelect: 'Activar selección múltiple',
     cancelSelect: 'Cancelar',