- Introduced ShiftCard widget to standardize the display of shift information across different states (assigned, completed, cancelled, pending).
- Removed redundant card implementations (_CompletedShiftCard, MyShiftCard, ShiftAssignmentCard) and replaced them with ShiftCard.
- Updated localization for empty states and shift titles in HistoryShiftsTab and MyShiftsTab.
- Enhanced MyShiftsTab to track submitted shifts locally and show appropriate actions based on shift status.
- Added meta package dependency for improved type annotations.
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