feat(web+android): search play queues only the tapped song (radio fills the rest)

Playing a song from search results queued the whole result list. Now it plays only
the clicked song; Radio mode, if on, fills the rest — closer to Spotify. Both
platforms already trigger a radio top-up on the first track (web playQueue →
fillRadioQueue; Android onMediaItemTransition → checkRadioRefill), so no extra wiring
is needed. Album/playlist play still queues the full list. Bump SW cache to ns-v44.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/views/search.js

@@ -82,7 +82,7 @@ export async function doLocalSearch(q, el) {
     if(songs.length) {
       const sec = mkSection('Titel');
       const list = document.createElement('div'); list.className = 'song-list';
-      songs.forEach((so,i) => list.appendChild(makeSongItem(so, i, songs)));
+      songs.forEach((so,i) => list.appendChild(makeSongItem(so, i, songs, { singlePlay: true })));
       sec.appendChild(list); el.appendChild(sec);
     }
   } catch(e) { el.innerHTML = `<p style="color:var(--danger)">${e.message}</p>`; }