feat: player drag feedback, global search fixes, iTunes artist discovery

- Player bar: drag handle pill + live lift/peek animation when swiping up to NP
- Global search: now includes Navidrome library results alongside iTunes; fix songs not showing (filter wrapperType=track)
- iTunes artist page: hero banner with album art, top songs section
- Artist detail: iTunes global top tracks + extra albums not on server

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

src/main.js

@@ -112,20 +112,46 @@ window.addEventListener('load', () => {
   // Click player-art to open Now Playing
   document.getElementById('player-art')?.addEventListener('click', openNowPlaying);
 
-  // Swipe-up on player bar to open Now Playing
+  // Swipe-up on player bar to open Now Playing (with drag visual feedback)
   const playerBar = document.querySelector('.player');
+  const npOverlay = document.getElementById('np-overlay');
   if(playerBar) {
-    let _sy=0, _st=0;
+    let _sy=0, _dragging=false;
+
+    function _resetDrag(open) {
+      playerBar.classList.remove('dragging');
+      playerBar.style.transform = '';
+      if(npOverlay) { npOverlay.style.transition = ''; npOverlay.style.transform = ''; }
+      if(open) openNowPlaying();
+      _sy=0; _dragging=false;
+    }
+
     playerBar.addEventListener('touchstart', e => {
       if(e.target.closest('button') || e.target.closest('.progress-bar') || e.target.closest('.volume-wrap')) return;
-      _sy=e.touches[0].clientY; _st=Date.now();
+      _sy=e.touches[0].clientY; _dragging=false;
     }, {passive:true});
+
+    playerBar.addEventListener('touchmove', e => {
+      if(!_sy) return;
+      const dy = _sy - e.touches[0].clientY;
+      if(dy < 5) return;
+      _dragging = true;
+      playerBar.classList.add('dragging');
+      const lift = Math.min(Math.max(dy, 0), 160);
+      playerBar.style.transform = `translateY(${-lift}px)`;
+      if(npOverlay) {
+        npOverlay.style.transition = 'none';
+        npOverlay.style.transform = `translateY(${Math.max(0, window.innerHeight - lift * 1.6)}px)`;
+      }
+    }, {passive:true});
+
     playerBar.addEventListener('touchend', e => {
       if(!_sy) return;
-      const dy=_sy-e.changedTouches[0].clientY, dt=Date.now()-_st;
-      if(dy>40 || (dt<300&&dy>15)) openNowPlaying();
-      _sy=0;
+      const dy = _sy - e.changedTouches[0].clientY;
+      _resetDrag(_dragging ? dy > 60 : dy > 15);
     }, {passive:true});
+
+    playerBar.addEventListener('touchcancel', () => _resetDrag(false), {passive:true});
   }
 });