Faster event updates (avoid full re-render)

src/components/CalendarView.vue

@@ -87,7 +87,7 @@ const vwm = createVirtualWeekManager({
   contentHeight,
 })
 const visibleWeeks = vwm.visibleWeeks
-const { scheduleWindowUpdate, resetWeeks } = vwm
+const { scheduleWindowUpdate, resetWeeks, refreshEvents } = vwm
 
 // Scroll managers (after scheduleWindowUpdate available)
 const scrollManager = createScrollManager({ viewport, scheduleRebuild: scheduleWindowUpdate })
@@ -395,11 +395,17 @@ watch(
 watch(
   () => calendarStore.events,
   () => {
-    resetWeeks('events')
+    refreshEvents('events')
   },
   { deep: true },
 )
 
+// Reflect selection & events by rebuilding day objects in-place
+watch(
+  () => [selection.value.startDate, selection.value.dayCount],
+  () => refreshEvents('selection'),
+)
+
 // Rebuild if viewport height changes (e.g., resize)
 window.addEventListener('resize', () => {
   if (viewport.value) viewportHeight.value = viewport.value.clientHeight