fix(timeline-event): fixed overflowed buttons, event expansion on focus

app/src/plugins/app@vendor/vue-cal/event.vue

@@ -67,6 +67,19 @@ export default {
 		 * Do not prevent propagation to trigger cell mousedown which highlights the cell if not highlighted.
 		 */
 		onMouseDown(e, touch = false) {
+			let targetElement
+
+			if (e.target.nodeName == 'BUTTON') {
+				targetElement = e.target
+			} else if (e.srcElement.nodeName == 'IMG') {
+				targetElement = e.target.parentElement
+			}
+
+			if (targetElement?.classList?.contains('v-btn__content') || e?.target?.nodeName == 'BUTTON') {
+				e.preventDefault()
+				return
+			}
+
 			// Prevent a double mouse down on touch devices.
 			if ("ontouchstart" in window && !touch) return false;
 			const { clickHoldAnEvent, focusAnEvent, resizeAnEvent, dragAnEvent } =