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/managers/GridManager.ts

@@ -23,7 +23,7 @@ export class GridManager {
   
   constructor() {
     // Initialize GridRenderer with config
-    this.gridRenderer = new GridRenderer(calendarConfig);
+    this.gridRenderer = new GridRenderer();
     this.init();
   }
   
@@ -151,7 +151,7 @@ export class GridManager {
     
     this.currentDate = nextDate;
     
-    eventBus.emit(CoreEvents.PERIOD_CHANGED, {
+    eventBus.emit(CoreEvents.NAVIGATION_COMPLETED, {
       direction: 'next',
       newDate: nextDate,
       periodLabel: this.getCurrentPeriodLabel()
@@ -182,7 +182,7 @@ export class GridManager {
     
     this.currentDate = prevDate;
     
-    eventBus.emit(CoreEvents.PERIOD_CHANGED, {
+    eventBus.emit(CoreEvents.NAVIGATION_COMPLETED, {
       direction: 'previous',
       newDate: prevDate,
       periodLabel: this.getCurrentPeriodLabel()