fix(artist-detail): Last.fm/Wikipedia/Favorite hover keeps button border (#966)

* fix(artist-detail): keep ext-link border visible on hover

Hover used --border-subtle, which on Catppuccin matches --bg-card and
visually erased the rim while only the fill changed. Match btn-surface:
--ctp-surface1 border, --ctp-overlay0 on hover.

* docs(changelog): credit zunoz on Psysonic Discord for PR #966

* fix(playlists): tooltips on Play/Add Songs and song count pluralization

Add data-tooltip to Play and Add Songs in playlist hero; switch
playlists.songs to count-based _one/_other forms (was {{n}} without
i18next plural suffix, breaking spacing and singular).

* fix(playlists): render BPM and optional cols in Suggested Songs rows

PlaylistSuggestions shared column headers with the main tracklist but
its row switch omitted bpm, genre, playCount, and lastPlayed.

src/locales/es/playlists.ts

@@ -9,8 +9,10 @@ export const playlists = {
   emptyPlaylist: 'Esta lista está vacía.',
   addFirstSong: 'Agrega tu primera canción',
   notFound: 'Lista no encontrada.',
-  songs: '{{n}} canciones',
+  songs_one: '{{count}} canción',
+  songs_other: '{{count}} canciones',
   playAll: 'Reproducir Todo',
+  playTooltip: 'Reproducir lista',
   shuffle: 'Aleatorio',
   addToQueue: 'Agregar a Cola',
   back: 'Volver a Listas',
@@ -18,6 +20,7 @@ export const playlists = {
   confirmDelete: 'Click de nuevo para confirmar',
   removeSong: 'Quitar de lista',
   addSongs: 'Agregar Canciones',
+  addSongsTooltip: 'Buscar en la biblioteca y agregar canciones',
   searchPlaceholder: 'Buscar en tu biblioteca…',
   noResults: 'Sin resultados.',
   suggestions: 'Canciones Sugeridas',