fix: remove overlay cap during swipe-up so NP slides smoothly without stopping

The Math.min(160) cap on 'lift' meant the overlay froze after 160px of drag
(at ~70% down the screen) while the finger kept moving — the felt 'stop'.

Now: player bar caps at its own height (once it slides off, no more movement
needed), overlay tracks the finger with no cap at 2.5× speed so ~360px of
upward drag fully reveals the now-playing screen. Release animation (from
the previous fix) then carries it smoothly to position 0.

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

src/main.js

@@ -258,11 +258,13 @@ window.addEventListener('load', () => {
       if(dy < 5) return;
       _dragging = true;
       playerBar.classList.add('dragging');
-      const lift = Math.min(Math.max(dy, 0), 160);
-      playerBar.style.transform = `translateY(${-lift}px)`;
+      // Player bar rises up to its own height, then stops — no need to travel further.
+      const barH = playerBar.offsetHeight || 72;
+      playerBar.style.transform = `translateY(${-Math.min(dy, barH)}px)`;
       if(npOverlay) {
         npOverlay.style.transition = 'none';
-        npOverlay.style.transform = `translateY(${Math.max(0, window.innerHeight - lift * 1.6)}px)`;
+        // Overlay tracks finger with no cap: 2.5× speed so ~360px drag = fully open.
+        npOverlay.style.transform = `translateY(${Math.max(0, window.innerHeight - dy * 2.5)}px)`;
       }
     }, {passive:true});