Renders all-day events based on header data

Refactors all-day event rendering to use header column data.
This ensures events are rendered based on the actual visible
dates in the header, improving accuracy and responsiveness to view changes.

Removes direct dependency on week dates in `AllDayManager` and
`EventRenderingService`, instead, the all-day manager is instantiated
with event manager.

Updates `HeaderManager` to emit header bounds.

src/factories/ManagerFactory.ts

@@ -38,7 +38,7 @@ export class ManagerFactory {
     const navigationManager = new NavigationManager(eventBus, eventRenderer);
     const viewManager = new ViewManager(eventBus);
     const dragDropManager = new DragDropManager(eventBus);
-    const allDayManager = new AllDayManager();
+    const allDayManager = new AllDayManager(eventManager);
     
     // CalendarManager depends on all other managers
     const calendarManager = new CalendarManager(