Refactors element positioning during drag operations to:
- Use getBoundingClientRect for precise Y positioning
- Move events to events-layer for consistent dragging
- Ensure proper absolute positioning across different event layouts
Addresses positioning inconsistencies for grouped and stacked events
Introduces HeaderDrawerRenderer and HeaderDrawerLayoutEngine to support dragging events into an all-day header drawer
Enables dynamic event placement and conversion between timed and all-day events through new drag interactions
Implements flexible layout calculation for header items with column and row management
Extends DragDropManager to handle header zone interactions
Adds new event types for header drag events
Simplifies EdgeScrollManager implementation with more focused and efficient auto-scrolling logic
Removes unnecessary complexity and scroll tracking
Optimizes scroll velocity calculation and boundary detection
Improves performance by using requestAnimationFrame for smooth scrolling
Implements EdgeScrollManager to enable automatic scrolling during drag operations
Introduces new scroll management system that:
- Detects mouse proximity to container edges
- Provides variable scroll speed based on mouse position
- Compensates dragged elements during scrolling
Enhances drag-and-drop user experience with smooth scrolling
Introduces support for moving events between columns during drag
Tracks column changes and updates event positioning dynamically
Enables smooth cross-column event dragging experience
