feat(settings): cross-tab fuzzy search + tab restructure polish (#263)

Cross-tab settings search:
- Static SETTINGS_INDEX covering every sub-section of every tab, with
  free-form keywords per entry so "scrobble" finds Last.fm, "replay gain"
  finds Playback, etc.
- matchScore() does substring-first ranking, falls back to a char-in-order
  fuzzy match so typos still yield hits.
- Active tab keeps its in-place hide/show filter; matches from other tabs
  render at the top as a clickable "In other tabs" list (tab badge +
  sub-section title). Clicking clears the query, switches tab, and scrolls
  + opens the target sub-section.
- All 8 locales updated: new searchOtherTabs key, searchNoResults reworded
  (old "try another tab" hint is now handled by the list itself).

Settings restructure polish:
- "Next Track Buffering" moved from Audio to the Storage tab — sits
  between Offline Library and Downloads.
- Storage tab label renamed across 8 locales: "Storage & Downloads" →
  "Offline & Cache" (equivalents per locale). nb locale was missing
  tabStorage entirely; added. Tab id stays 'storage' to avoid breaking
  persisted state.
- Library tab: Random Mix sub-section now opens by default (previously
  both sub-sections started collapsed) and is renamed "Random Mix
  Blacklist" in all 8 locales — the section is entirely a blacklist
  config, the old title was misleading.
- Lyrics tab:
  * Standard / YouLyPlus rows use the same toggle style as the "Show
    lyrics as static text" row and stack vertically. Order swapped so
    YouLyPlus is first.
  * Provider list (Server / LRCLIB / Netease) moved to appear directly
    under the Standard toggle as its sub-item, indented, instead of after
    the static-text toggle.
  * Classic / Apple Music-like rows likewise rebuilt as vertical toggle
    rows.
- One pre-existing typo carried in from #261 fixed along the way: the
  openAddServerInvite handler in Settings referenced the renamed tab id
  'server' (pre-#259) — now 'servers'. [Note: already landed in PR #262,
  keeping this commit clean of that.]

Co-authored-by: Psychotoxical <dev@psysonic.app>
Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/locales/es.ts

@@ -680,7 +680,7 @@ export const esTranslation = {
     aboutContributorsLabel: 'Contribuidores',
     showChangelogOnUpdate: "Mostrar 'Novedades' al actualizar",
     showChangelogOnUpdateDesc: 'Muestra un discreto banner de changelog encima de Now Playing tras una actualización. Clic abre las notas de la versión; X lo oculta.',
-    randomMixTitle: 'Mezcla Aleatoria',
+    randomMixTitle: 'Lista negra de Mezcla Aleatoria',
     randomMixBlacklistTitle: 'Palabras Clave de Filtro Personalizadas',
     randomMixBlacklistDesc: 'Las canciones se excluyen cuando cualquier palabra clave coincide con su género, título, álbum o artista (activo cuando el checkbox de arriba está activado).',
     randomMixBlacklistPlaceholder: 'Agregar palabra clave…',
@@ -688,7 +688,7 @@ export const esTranslation = {
     randomMixBlacklistEmpty: 'Aún no hay palabras clave personalizadas.',
     randomMixHardcodedTitle: 'Palabras clave integradas (activas cuando el checkbox está activado)',
     tabAudio: 'Audio',
-    tabStorage: 'Almacenamiento y Descargas',
+    tabStorage: 'Sin conexión y caché',
     tabAppearance: 'Apariencia',
     tabLibrary: 'Biblioteca',
     tabServers: 'Servidores',
@@ -699,7 +699,8 @@ export const esTranslation = {
     aboutContributorsCount_one: '{{count}} contribución',
     aboutContributorsCount_other: '{{count}} contribuciones',
     searchPlaceholder: 'Buscar en ajustes…',
-    searchNoResults: 'No hay ajustes coincidentes en esta pestaña. Prueba con otra.',
+    searchNoResults: 'Ningún ajuste coincide con tu búsqueda.',
+    searchOtherTabs: 'En otras pestañas',
     aboutMaintainersLabel: 'Mantenedores',
     integrationsPrivacyTitle: 'Aviso de privacidad',
     integrationsPrivacyBody: 'Todas las integraciones de esta pestaña son <strong>opt-in</strong> y, una vez activadas, envían datos a servicios externos o a tu servidor Navidrome. Last.fm recibe tu historial de escucha, Discord muestra la pista actual en tu perfil, Bandsintown se consulta por artista para obtener fechas de gira, y la compartición «En reproducción» publica tu pista actual para otros usuarios de tu servidor Navidrome. Si no quieres nada de esto, simplemente deja desactivada la sección correspondiente.',