Centralizes all date calculations into a new `DateCalculator` class for better maintainability and consistency.
Ensures correct ISO week handling (Monday as the first day) throughout the calendar.
Updates `CalendarConfig` to use ISO day numbering (1-7 for Mon-Sun) for work week definitions.
Fixes issue where date calculations were inconsistent.
Enhances event rendering and navigation.
Updates navigation logic to use pre-rendered events.
Removes the need for `CONTAINER_READY_FOR_EVENTS` event.
Adopts ISO week date calculation (Monday-based) for consistency
and accuracy across calendar components. This change ensures
standardized week determination, resolving potential discrepancies
in week-based operations.
Centralizes date calculation logic into a dedicated DateCalculator
class for improved maintainability and testability.
Removes redundant date calculation methods from CalendarManager,
ColumnRenderer, HeaderRenderer and NavigationRenderer, and utilizes
the DateCalculator for these calculations.
Updates components to use DateCalculator for consistent date
handling, including week start determination, date formatting,
and "is today" checks.
