fix(calendar): use full available calendar viewport height on desktop

frontend/app/components/workspace/CrmWorkspaceApp.vue

@@ -2310,6 +2310,10 @@ onBeforeUnmount(() => {
     clearInterval(lifecycleClock);
     lifecycleClock = null;
   }
+  if (calendarViewportResizeObserver) {
+    calendarViewportResizeObserver.disconnect();
+    calendarViewportResizeObserver = null;
+  }
   clearCalendarZoomPrime();
 });
 
@@ -2360,16 +2364,29 @@ type CalendarRect = { left: number; top: number; width: number; height: number }
 const calendarContentWrapRef = ref<HTMLElement | null>(null);
 const calendarContentScrollRef = ref<HTMLElement | null>(null);
 const calendarSceneRef = ref<HTMLElement | null>(null);
+const calendarViewportHeight = ref(0);
 const calendarHoveredMonthIndex = ref<number | null>(null);
 const calendarHoveredWeekStartKey = ref("");
 const calendarHoveredDayKey = ref("");
+let calendarViewportResizeObserver: ResizeObserver | null = null;
 
 function setCalendarContentWrapRef(element: HTMLElement | null) {
   calendarContentWrapRef.value = element;
 }
 
 function setCalendarContentScrollRef(element: HTMLElement | null) {
+  if (calendarViewportResizeObserver) {
+    calendarViewportResizeObserver.disconnect();
+    calendarViewportResizeObserver = null;
+  }
   calendarContentScrollRef.value = element;
+  if (element && typeof ResizeObserver !== "undefined") {
+    calendarViewportResizeObserver = new ResizeObserver(() => {
+      calendarViewportHeight.value = Math.max(0, Math.round(element.clientHeight));
+    });
+    calendarViewportResizeObserver.observe(element);
+    calendarViewportHeight.value = Math.max(0, Math.round(element.clientHeight));
+  }
 }
 
 function setCalendarSceneRef(element: HTMLElement | null) {
@@ -4765,6 +4782,7 @@ async function decideFeedCard(card: FeedCard, decision: "accepted" | "rejected")
               :set-calendar-content-scroll-ref="setCalendarContentScrollRef"
               :on-calendar-hierarchy-wheel="onCalendarHierarchyWheel"
               :set-calendar-scene-ref="setCalendarSceneRef"
+              :calendar-viewport-height="calendarViewportHeight"
               :normalized-calendar-view="normalizedCalendarView"
               :calendar-scene-transform-style="calendarSceneTransformStyle"
               :on-calendar-scene-mouse-leave="onCalendarSceneMouseLeave"