feat(home): Because you listened recommendation rail (#489)

* feat(home): "Because you listened" recommendation rail

New Home rail (under Recently Added, default on, toggleable in Settings →
Personalisation → Home Page) that surfaces 3 albums from artists similar
to one of your top-played artists. Anchor rotates per Home mount so a
different top-artist seeds the recommendations each visit; within each
anchor, both the similar-artist subset and the chosen album per artist
are randomised, so the same anchor returns different picks on subsequent
visits.

Card layout matches the regular Album cards' surface (--bg-card with
accent-tinted border + 1px inset top highlight) and gets the same
Play / Enqueue hover overlay buttons. Cover and meta scale via CSS only
— no infinite animations, no filter/blur/transform, no compositing
layers. Grid wraps below 3-up at <400px card width instead of shrinking.

API budget: one getArtistInfo2 + 6 parallel getArtist calls per Home
mount, both reusing the existing mostPlayed payload to derive the anchor
pool (no extra API call to find top artists). All 8 locales seeded.

* fix(home): ru plurals + per-server anchor + narrower card grid

- ru: add _few / _many for becauseYouLikeTracks (CLDR Russian needs
  4 forms — 3 треков was wrong, now 3 трека).
- Anchor rotation memory is now per-server. The localStorage key
  becomes psysonic_because_anchor:<serverId>; switching servers no
  longer aliases server A's rotation onto server B's pool.
- because-card grid minmax(400px, 1fr) -> minmax(340px, 1fr) so two
  cards fit side by side at typical sidebar-expanded widths instead
  of collapsing to a single card per row.

* docs: CHANGELOG + Contributors entry for Because-you-listened rail (PR #489)

* style(home): blurred cover backdrop + centred layout for Because-cards

- Each Because-card renders the album cover as a blurred, low-opacity
  full-bleed background layer behind the existing cover thumb and text.
  Resolved through useCachedUrl so the cache layer feeds it (same key
  as the thumbnail) instead of a fresh salted URL on every render.
- Card content (cover thumb + text block) now centred horizontally and
  vertically within the card; the meta line lives in a small pill that
  sits centred under the artist row.
- Text contrast halo and meta-pill background are theme-aware via
  color-mix on var(--bg-card) / var(--text-primary), so the same rules
  read on dark and light themes (was hard-coded rgba black before and
  smudged the type on Latte / Nord Snowstorm).

src/locales/de.ts

@@ -46,7 +46,12 @@ export const deTranslation = {
     loadMore: 'Mehr laden',
     discoverMore: 'Mehr entdecken',
     discoverArtists: 'Künstler entdecken',
-    discoverArtistsMore: 'Alle Künstler'
+    discoverArtistsMore: 'Alle Künstler',
+    becauseYouLike: 'Weil du gehört hast…',
+    becauseYouLikeFor: 'Weil du {{artist}} gehört hast',
+    similarTo: 'Ähnlich wie {{artist}}',
+    becauseYouLikeTracks_one: '{{count}} Titel',
+    becauseYouLikeTracks_other: '{{count}} Titel'
   },
   hero: {
     eyebrow: 'Album des Augenblicks',

src/locales/en.ts

@@ -48,7 +48,12 @@ export const enTranslation = {
     loadMore: 'Load More',
     discoverMore: 'Discover More',
     discoverArtists: 'Discover Artists',
-    discoverArtistsMore: 'All Artists'
+    discoverArtistsMore: 'All Artists',
+    becauseYouLike: 'Because you listened…',
+    becauseYouLikeFor: 'Because you listened to {{artist}}',
+    similarTo: 'Similar to {{artist}}',
+    becauseYouLikeTracks_one: '{{count}} track',
+    becauseYouLikeTracks_other: '{{count}} tracks'
   },
   hero: {
     eyebrow: 'Featured Album',

src/locales/es.ts

@@ -47,7 +47,12 @@ export const esTranslation = {
     loadMore: 'Cargar Más',
     discoverMore: 'Descubrir Más',
     discoverArtists: 'Descubrir Artistas',
-    discoverArtistsMore: 'Todos los Artistas'
+    discoverArtistsMore: 'Todos los Artistas',
+    becauseYouLike: 'Porque escuchaste…',
+    becauseYouLikeFor: 'Porque escuchaste a {{artist}}',
+    similarTo: 'Similar a {{artist}}',
+    becauseYouLikeTracks_one: '{{count}} canción',
+    becauseYouLikeTracks_other: '{{count}} canciones'
   },
   hero: {
     eyebrow: 'Álbum Destacado',

src/locales/fr.ts

@@ -46,7 +46,12 @@ export const frTranslation = {
     loadMore: 'Charger plus',
     discoverMore: 'Découvrir plus',
     discoverArtists: 'Découvrir des artistes',
-    discoverArtistsMore: 'Tous les artistes'
+    discoverArtistsMore: 'Tous les artistes',
+    becauseYouLike: 'Parce que tu as écouté…',
+    becauseYouLikeFor: 'Parce que tu as écouté {{artist}}',
+    similarTo: 'Similaire à {{artist}}',
+    becauseYouLikeTracks_one: '{{count}} titre',
+    becauseYouLikeTracks_other: '{{count}} titres'
   },
   hero: {
     eyebrow: 'Album en vedette',

src/locales/nb.ts

@@ -46,7 +46,12 @@ export const nbTranslation = {
     loadMore: 'Last inn flere',
     discoverMore: 'Oppdag flere',
     discoverArtists: 'Oppdag artister',
-    discoverArtistsMore: 'Alle artister'
+    discoverArtistsMore: 'Alle artister',
+    becauseYouLike: 'Fordi du har hørt…',
+    becauseYouLikeFor: 'Fordi du har hørt på {{artist}}',
+    similarTo: 'Likt {{artist}}',
+    becauseYouLikeTracks_one: '{{count}} spor',
+    becauseYouLikeTracks_other: '{{count}} spor'
   },
   hero: {
     eyebrow: 'Utvalgt album',

src/locales/nl.ts

@@ -46,7 +46,12 @@ export const nlTranslation = {
     loadMore: 'Meer laden',
     discoverMore: 'Meer ontdekken',
     discoverArtists: 'Artiesten ontdekken',
-    discoverArtistsMore: 'Alle artiesten'
+    discoverArtistsMore: 'Alle artiesten',
+    becauseYouLike: 'Omdat je hebt geluisterd…',
+    becauseYouLikeFor: 'Omdat je naar {{artist}} hebt geluisterd',
+    similarTo: 'Lijkt op {{artist}}',
+    becauseYouLikeTracks_one: '{{count}} nummer',
+    becauseYouLikeTracks_other: '{{count}} nummers'
   },
   hero: {
     eyebrow: 'Uitgelicht album',

src/locales/ru.ts

@@ -49,6 +49,13 @@ export const ruTranslation = {
     discoverMore: 'Смотреть ещё',
     discoverArtists: 'Исполнители',
     discoverArtistsMore: 'Все исполнители',
+    becauseYouLike: 'Потому что вы слушали…',
+    becauseYouLikeFor: 'Потому что вы слушали {{artist}}',
+    similarTo: 'Похоже на {{artist}}',
+    becauseYouLikeTracks_one: '{{count}} трек',
+    becauseYouLikeTracks_few: '{{count}} трека',
+    becauseYouLikeTracks_many: '{{count}} треков',
+    becauseYouLikeTracks_other: '{{count}} треков',
   },
   hero: {
     eyebrow: 'Альбом дня',

src/locales/zh.ts

@@ -46,7 +46,12 @@ export const zhTranslation = {
     loadMore: '加载更多',
     discoverMore: '发现更多',
     discoverArtists: '发现艺术家',
-    discoverArtistsMore: '全部艺术家'
+    discoverArtistsMore: '全部艺术家',
+    becauseYouLike: '因为你听过…',
+    becauseYouLikeFor: '因为你听过 {{artist}}',
+    similarTo: '类似 {{artist}}',
+    becauseYouLikeTracks_one: '{{count}} 首',
+    becauseYouLikeTracks_other: '{{count}} 首'
   },
   hero: {
     eyebrow: '精选专辑',