Refactors calendar configuration and event handling

Streamlines calendar configuration by adopting a singleton pattern for consistent access and simplifies event handling.

- Removes direct `CalendarConfig` dependency injection in favor of the `calendarConfig` singleton, reducing code complexity.
- Replaces specific event emissions for grid, date, and resource settings updates with a general `REFRESH_REQUESTED` event.
- Updates event names to be more descriptive and consistent ("NAVIGATION_COMPLETED", "PERIOD_INFO_UPDATE").
- Removes the need to pass the calendar config to renderers since it is now a singleton.

This improves code maintainability and simplifies the event emission process.

src/constants/CoreEvents.ts

@@ -15,8 +15,8 @@ export const CoreEvents = {
   
   // Navigation events (3)
   DATE_CHANGED: 'nav:date-changed',
-  PERIOD_CHANGED: 'nav:period-changed',
-  WEEK_CHANGED: 'nav:week-changed',
+  NAVIGATION_COMPLETED: 'nav:navigation-completed',
+  PERIOD_INFO_UPDATE: 'nav:period-info-update',
   
   // Data events (4)
   DATA_LOADING: 'data:loading',
@@ -65,8 +65,8 @@ export const EVENT_MIGRATION_MAP: Record<string, string> = {
   
   // Navigation
   'calendar:datechanged': CoreEvents.DATE_CHANGED,
-  'calendar:periodchange': CoreEvents.PERIOD_CHANGED,
-  'calendar:weekchanged': CoreEvents.WEEK_CHANGED,
+  'calendar:navigationcompleted': CoreEvents.NAVIGATION_COMPLETED,
+  'calendar:periodinfoUpdate': CoreEvents.PERIOD_INFO_UPDATE,
   
   // Data
   'calendar:datafetchstart': CoreEvents.DATA_LOADING,