feat: add benefit history feature with lazy loading and pagination

- Implemented `getBenefitsHistory` method in `HomeRepository` to retrieve paginated benefit history.
- Enhanced `BenefitsOverviewCubit` to manage loading and displaying benefit history.
- Created `BenefitHistoryPage` for full-screen display of benefit history with infinite scroll support.
- Added `BenefitHistoryPreview` widget for expandable history preview in benefit cards.
- Introduced `BenefitHistoryRow` to display individual history records.
- Updated `BenefitsOverviewState` to include history management fields.
- Added new entities and use cases for handling benefit history.
- Created design system documentation for UI patterns and known gaps.

apps/mobile/packages/features/staff/clock_in/lib/src/presentation/widgets/shift_card.dart

@@ -80,7 +80,6 @@ class _ShiftDetails extends StatelessWidget {
       crossAxisAlignment: CrossAxisAlignment.start,
       children: <Widget>[
         Text(shift.title, style: UiTypography.body2b),
-        // TODO: Ask BE to add clientName to the listTodayShifts response.
         // Currently showing locationName as subtitle fallback.
         Text(
           shift.locationName ?? '',