Implement centralized event management system with priority handling and state tracking

- Enhanced EventManager class to support priority-based event handling, conditional execution, and automatic cleanup.
- Integrated event management into BulkManager for global keyboard shortcuts and marquee selection events.
- Migrated mouse tracking and node selector events to UIHelpers for better coordination.
- Established global event handlers for context menu interactions and modal state management.
- Added comprehensive documentation for event management implementation and usage.
- Implemented initialization logic for event management, including error handling and cleanup on page unload.

static/js/components/controls/PageControls.js

@@ -70,7 +70,6 @@ export class PageControls {
     async initSidebarManager() {
         try {
             await this.sidebarManager.initialize(this);
-            console.log('SidebarManager initialized');
         } catch (error) {
             console.error('Failed to initialize SidebarManager:', error);
         }