Refactor data source and configuration management

Abstracts column data source with interface
Updates managers to use configuration-driven view and date
Decouples datasource creation from individual managers

Improves flexibility and dependency injection for calendar components

src/types/ColumnDataSource.ts

@@ -1,4 +1,5 @@
 import { IResource } from './ResourceTypes';
+import { CalendarView } from './CalendarTypes';
 
 /**
  * Column information container
@@ -26,4 +27,16 @@ export interface IColumnDataSource {
    * Get the type of columns this datasource provides
    */
   getType(): 'date' | 'resource';
+
+  /**
+   * Update the current date for column calculations
+   * @param date - The new current date
+   */
+  setCurrentDate(date: Date): void;
+
+  /**
+   * Update the current view (day/week/month)
+   * @param view - The new calendar view
+   */
+  setCurrentView(view: CalendarView): void;
 }