Updates the all-day event layout engine for better event
rendering, especially when dealing with partial week views.
The layout engine now correctly clips events that start
before or end after the visible date range, ensuring that
only relevant portions of events are displayed.
It also fixes event ordering.
Includes new unit tests to validate date range filtering and
clipping logic.
Adds comprehensive tests for the AllDayManager, covering various overlap scenarios.
Tests ensure correct row and column assignments for all-day events based on date ranges and overlaps.
Replaces individual event layout calculation with batch calculation for improved performance and test coverage.
Refactors all-day event rendering to use a layout engine
for overlap detection and positioning, ensuring events
are placed in available rows and columns.
Removes deprecated method and adds unit tests.
