- Enhanced `ExpenseResponse` and `ExpenseData` models to handle null values and provide default values.
- Introduced a new `Filter` class to encapsulate filtering logic for expenses.
- Updated `ExpenseDetailScreen` to utilize a controller for fetching expense details and managing loading states.
- Improved UI responsiveness with loading skeletons and error messages.
- Refactored filter bottom sheet to streamline filter selection and reset functionality.
- Added visual indicators for filter application in the main expense screen.
- Enhanced expense detail display with better formatting and status color handling.
