Supported Destinations now includes Mac (Mac Catalyst) on the app and the
widget extension. Catalyst requires the iPad device family, so both targets
move to TARGETED_DEVICE_FAMILY "1,2".
The first Catalyst build failed on CalendarSelectionIntent: WidgetConfigurationIntent
requires every @Parameter to be optional, and the macOS SDK enforces that where
the iOS one lets a bare array through. selectedCalendars is now optional.
Behaviour is unchanged — the timeline provider already treated an empty
selection as "show all calendars", so nil folds into the same path.
Verified: builds for both Mac Catalyst and iOS Simulator.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>