fix: use pointerdown+pointerType to block touch seeks on bottom bar

mousedown does not expose the input source — replaced with pointerdown
which carries pointerType='touch', allowing noTouch=true to reliably
skip touch input without affecting mouse/stylus on PC.

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

src/player.js

@@ -735,12 +735,13 @@ function _initBarScrub(bar, fill, onMove, noTouch = false) {
       _touchMoved = false;
     }, {passive:true});
   }
-  bar.addEventListener('mousedown', e => {
+  bar.addEventListener('pointerdown', e => {
+    if (noTouch && e.pointerType === 'touch') return; // bottom bar: mouse/stylus only
     startScrub(getPos(e.clientX)); e.preventDefault();
     const mm = e2 => { if(S._scrubbing) moveScrub(getPos(e2.clientX)); };
-    const mu = e2 => { if(S._scrubbing) endScrub(getPos(e2.clientX)); document.removeEventListener('mousemove',mm); document.removeEventListener('mouseup',mu); };
-    document.addEventListener('mousemove', mm);
-    document.addEventListener('mouseup', mu);
+    const mu = e2 => { if(S._scrubbing) endScrub(getPos(e2.clientX)); document.removeEventListener('pointermove',mm); document.removeEventListener('pointerup',mu); };
+    document.addEventListener('pointermove', mm);
+    document.addEventListener('pointerup', mu);
   });
 }