Updates all-day event overflow indicator

Ensures that the all-day event overflow indicator updates
correctly when the number of events changes, instead of
creating duplicate indicators.
Removes unused event click handling logic.

src/renderers/EventRendererManager.ts

@@ -197,16 +197,6 @@ export class EventRenderingService {
             }
         });
 
-        // Handle click (when drag threshold not reached)
-        this.eventBus.on('event:click', (event: Event) => {
-            const { draggedElement } = (event as CustomEvent).detail;
-            // Use draggedElement directly - no need for DOM query
-            if (draggedElement && this.strategy.handleEventClick) {
-                const eventId = draggedElement.dataset.eventId || '';
-                this.strategy.handleEventClick(eventId, draggedElement); //TODO: fix this redundant parameters
-            }
-        });
-
         // Handle column change
         this.eventBus.on('drag:column-change', (event: Event) => {
             let columnChangeEvent = (event as CustomEvent<DragColumnChangeEventPayload>).detail;