Merge branch 'main' into exp/orbit (pre-PR sync)

Conflicts resolved in:
- src/pages/SearchResults.tsx
- src/pages/AdvancedSearch.tsx

Both pages were rewritten on main (PR #303) to use the shared
<SongRow> component with click-to-enqueueAndPlay semantics. Orbit's
playSong helper that branched on orbit-active is no longer needed
at the page level — instead, orbit awareness moved INTO SongRow and
SongCard themselves: in an active orbit session both buttons collapse
into addTrackToOrbit (suggest for guests, host-enqueue for the host)
so we don't ship a queue replacement to every guest.

Also kept main's IntersectionObserver-based pagination on both pages.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/pages/Settings.tsx

@@ -4220,6 +4220,7 @@ function HomeCustomizer() {
     hero:            t('home.hero'),
     recent:          t('home.recent'),
     discover:        t('home.discover'),
+    discoverSongs:   t('home.discoverSongs'),
     discoverArtists: t('home.discoverArtists'),
     recentlyPlayed:  t('home.recentlyPlayed'),
     starred:         t('home.starred'),