Replaces global singleton configuration with dependency injection
Introduces more modular and testable approach to configuration
Removes direct references to calendarConfig in multiple components
Adds explicit configuration passing to constructors
Improves code maintainability and reduces global state dependencies
Moves complex layout determination logic (grid grouping, stack levels, positioning) from `EventRenderer` to a new `EventLayoutCoordinator` class.
Delegates layout responsibilities to the coordinator, significantly simplifying the `EventRenderer`'s `renderColumnEvents` method. Refines `EventStackManager` by removing deprecated layout methods, consolidating its role to event grouping and core stack level management.
Improves modularity and separation of concerns within the rendering pipeline.
Introduces a 3-phase algorithm in `EventStackManager` for dynamic event positioning. Groups events by start time proximity to determine optimal layout.
Optimizes horizontal space by using side-by-side grid columns for simultaneous events and allowing non-overlapping events to share stack levels. Supports nested stacking for late-arriving events within grid columns.
Includes comprehensive documentation (`STACKING_CONCEPT.md`) and a visual demonstration (`stacking-visualization.html`) to explain the new layout logic. Updates event rendering to utilize the new manager and adds extensive test coverage.
