feat: three-dot context menu on song rows + search shows songs as rows

- Add ⋮ button to every song-item triggering the context menu (same as right-click)
- Show song-actions always visible on touch devices via @media (hover:none)
- Search results: songs now render as makeSongItem rows instead of cards
  (artists/albums remain as horizontal card rows)
- Fix Android app opening system settings on every launch after notification
  permission denial — now only redirects to settings once using notif_settings_shown flag

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

src/components.js

@@ -55,11 +55,13 @@ export function makeSongItem(s, idx, list, { noArtistLink = false, noAlbumLink =
       <div class="song-actions">
         <button class="icon-btn${s._starred?' starred':''}" title="Favorit"><svg width="12" height="12" viewBox="0 0 24 24" fill="${s._starred?'currentColor':'none'}" stroke="currentColor" stroke-width="2"><polygon points="12 2 15.09 8.26 22 9.27 17 14.14 18.18 21.02 12 17.77 5.82 21.02 7 14.14 2 9.27 8.91 8.26 12 2"/></svg></button>
         <button class="icon-btn" title="Download"><svg width="12" height="12" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><path d="M21 15v4a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2v-4"/><polyline points="7 10 12 15 17 10"/><line x1="12" y1="15" x2="12" y2="3"/></svg></button>
+        <button class="icon-btn song-menu-btn" title="Mehr Optionen"><svg width="14" height="14" viewBox="0 0 24 24" fill="currentColor"><circle cx="12" cy="5" r="1.5"/><circle cx="12" cy="12" r="1.5"/><circle cx="12" cy="19" r="1.5"/></svg></button>
       </div>
     </div>`;
   const btns = el.querySelectorAll('.icon-btn');
   btns[0].onclick = (e) => { e.stopPropagation(); toggleStar(s, btns[0]); };
   btns[1].onclick = (e) => { e.stopPropagation(); dlSongLocal(s); };
+  btns[2].onclick = (e) => { e.stopPropagation(); showCtxMenu(e, s, list, idx); };
   el.onclick = () => playQueue(list, idx);
   el.addEventListener('contextmenu', e => { e.preventDefault(); showCtxMenu(e, s, list, idx); });
   return el;