Remove resource calendar mode support

Simplifies calendar configuration and removes resource-specific code paths

Eliminates complexity around resource-based calendar rendering by:
- Removing ResourceCalendarData type
- Removing resource-specific renderers and managers
- Streamlining event and grid management logic
- Consolidating to single date-based calendar implementation

src/managers/HeaderManager.ts

@@ -2,7 +2,6 @@ import { eventBus } from '../core/EventBus';
 import { CalendarConfig } from '../core/CalendarConfig';
 import { CoreEvents } from '../constants/CoreEvents';
 import { HeaderRenderer, HeaderRenderContext } from '../renderers/HeaderRenderer';
-import { ResourceCalendarData } from '../types/CalendarTypes';
 import { DragMouseEnterHeaderEventPayload, DragMouseLeaveHeaderEventPayload, HeaderReadyEventPayload } from '../types/EventTypes';
 import { ColumnDetectionUtils } from '../utils/ColumnDetectionUtils';
 
@@ -30,8 +29,8 @@ export class HeaderManager {
   /**
    * Initialize header with initial date
    */
-  public initializeHeader(currentDate: Date, resourceData: ResourceCalendarData | null = null): void {
-    this.updateHeader(currentDate, resourceData);
+  public initializeHeader(currentDate: Date): void {
+    this.updateHeader(currentDate);
   }
 
   /**
@@ -89,20 +88,20 @@ export class HeaderManager {
    */
   private setupNavigationListener(): void {
     eventBus.on(CoreEvents.NAVIGATION_COMPLETED, (event) => {
-      const { currentDate, resourceData } = (event as CustomEvent).detail;
-      this.updateHeader(currentDate, resourceData);
+      const { currentDate } = (event as CustomEvent).detail;
+      this.updateHeader(currentDate);
     });
 
     // Also listen for date changes (including initial setup)
     eventBus.on(CoreEvents.DATE_CHANGED, (event) => {
       const { currentDate } = (event as CustomEvent).detail;
-      this.updateHeader(currentDate, null);
+      this.updateHeader(currentDate);
     });
 
     // Listen for workweek header updates after grid rebuild
     eventBus.on('workweek:header-update', (event) => {
       const { currentDate } = (event as CustomEvent).detail;
-      this.updateHeader(currentDate, null);
+      this.updateHeader(currentDate);
     });
 
   }
@@ -110,10 +109,9 @@ export class HeaderManager {
   /**
    * Update header content for navigation
    */
-  private updateHeader(currentDate: Date, resourceData: ResourceCalendarData | null = null): void {
+  private updateHeader(currentDate: Date): void {
     console.log('🎯 HeaderManager.updateHeader called', {
       currentDate,
-      hasResourceData: !!resourceData,
       rendererType: this.headerRenderer.constructor.name
     });
 
@@ -129,8 +127,7 @@ export class HeaderManager {
     // Render new header content using injected renderer
     const context: HeaderRenderContext = {
       currentWeek: currentDate,
-      config: this.config,
-      resourceData: resourceData
+      config: this.config
     };
 
     console.log('🎨 HeaderManager: Calling renderer.render()', context);