feat(ratings): mix cutoff filter for random flows and home, i18n

Apply the same per-axis star cutoff to random mix (multi-batch fetch until
full), random albums, Hero, and Home hero/discover rows. Prefetch artist and
album ratings via Subsonic when list payloads omit them. Exclude items when
0 < rating ≤ threshold; 0 or missing counts as unrated.

Settings: rating filter description interpolates sidebar menu labels; Russian
strings for custom title bar; short axis labels aligned across locales.

src/locales/en.ts

@@ -496,16 +496,15 @@ export const enTranslation = {
     ratingsSectionTitle: 'Ratings',
     ratingsSkipStarTitle: 'Skip for 1 star',
     ratingsSkipStarDesc:
-      'After N manual skips of the same track, set server rating to 1 star if the track is still unrated.',
+      'After N skips in a row, set the track to 1★. Only for tracks not rated before.',
     ratingsSkipStarThresholdLabel: 'Skips before 1★',
-    ratingsSkipStarThresholdHint: 'Only counts when you leave the track with Next / media “next”, not when it ends on its own. Does nothing if the track is already rated 1 star or higher.',
     ratingsMixFilterTitle: 'Filter by rating',
     ratingsMixFilterDesc:
-      'Filter low-rated items in random mixes and random albums. Click the same star again to turn off that column’s threshold.',
-    ratingsMixMinSong: 'Songs (track rating)',
+      'Filter low-rated items in {{mix}} and {{albums}}. Click the selected star again to turn off the threshold.',
+    ratingsMixMinSong: 'Songs',
     ratingsMixMinAlbum: 'Albums',
     ratingsMixMinArtist: 'Artists',
-    ratingsMixMinThresholdAria: 'Minimum stars ({{label}})',
+    ratingsMixMinThresholdAria: 'Minimum stars: {{label}}',
     backupTitle: 'Backup & Restore',
     backupExport: 'Export settings',
     backupExportDesc: 'Saves all settings, server profiles, Last.fm config, theme, EQ and keybindings to a .psybkp file. Passwords are stored in plaintext — keep the file secure.',