fix: genre shuffle/play no longer navigates away from genre page

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

src/views.js

@@ -220,7 +220,6 @@ async function playGenre(genre) {
     if (!songs.length) return;
     const shuffled = [...songs].sort(() => Math.random() - 0.5);
     playQueue(shuffled, 0);
-    navigate('now-playing');
   } catch {}
 }
 
@@ -248,7 +247,6 @@ async function loadGenreDetail(g) {
   document.getElementById('btn-play-genre').onclick = () => {
     const shuffled = [...songs].sort(() => Math.random() - 0.5);
     playQueue(shuffled, 0);
-    navigate('now-playing');
   };
 
   list.innerHTML = '';