Mouse/touch event handling improvement

- prefer passive handlers
- fix event moving on touch
- faster selection updates

src/components/EventOverlay.vue

@@ -278,9 +278,7 @@ function startLocalDrag(init, evt) {
     }
   }
 
-  if (!(evt.pointerType === 'touch')) {
-    evt.preventDefault()
-  }
+  if (evt.cancelable) evt.preventDefault()
 
   window.addEventListener('pointermove', onDragPointerMove, { passive: false })
   window.addEventListener('pointerup', onDragPointerUp, { passive: false })
@@ -486,6 +484,8 @@ function applyRangeDuringDrag(st, startDate, endDate) {
   user-select: none;
   z-index: 1;
   text-align: center;
+  /* Ensure touch pointer events aren't turned into a scroll gesture; needed for reliable drag on mobile */
+  touch-action: none;
 }
 
 /* Inner title wrapper ensures proper ellipsis within flex/grid constraints */
@@ -510,6 +510,7 @@ function applyRangeDuringDrag(st, startDate, endDate) {
   background: transparent;
   z-index: 2;
   cursor: ew-resize;
+  touch-action: none; /* Allow touch resizing without scroll */
 }
 
 .event-span .resize-handle.left {