A new `ExpenseCreationScreen` and `ExpenseCreationViewModel` have been added to allow users to create new expenses. This includes fields for the title, amount, and a participant selection using filter chips.
Key changes:
- Added `ExpenseCreationViewModel` to handle user loading and persistent storage of expenses and shares.
- Created `ExpenseCreationScreen` UI with validation for the "Save" button.
- Updated `DashboardScreen` to include a Floating Action Button (FAB) for navigating to the expense creation flow.
- Added `expenseCreate` API endpoint and related data types (`ExpenseCreationRequest`, `ExpenseCreationResponse`).
- Integrated `ExpenseCreationViewModel` into `MainActivity` and `AppContent`.
Maurice L.
69e0344261
