fix: fetch real playlist song counts from getPlaylist in background

getPlaylists returns stale/wrong songCount from Navidrome's index.
After rendering the grid, fire one getPlaylist request per playlist
in parallel and update each card's subtitle as responses arrive.
Counts are visually corrected within a second of the page loading.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/views.js

@@ -692,6 +692,14 @@ export async function loadPlaylists() {
       c.querySelector('.card-info').onclick = () => navigate('playlist-detail', pl);
       g.appendChild(c);
     });
+    // Navidrome's getPlaylists songCount is often stale — fetch each real count in the background.
+    lists.forEach(pl => {
+      api('getPlaylist', `&id=${pl.id}`).then(r => {
+        const count = (r.playlist?.entry || []).length;
+        const card = g.querySelector(`[data-pl-id="${pl.id}"]`);
+        if (card) card.querySelector('.card-sub').textContent = count + ' Titel';
+      }).catch(() => {});
+    });
   } catch(e) { g.innerHTML = `<p style="color:var(--danger)">${e.message}</p>`; }
 }