Refactor the Filament dashboard by replacing the legacy FinanceOverviewWidget
with a new set of specialized widgets:
- DashboardInfoWidget for general information
- ExchangeRateWidget for real-time rate monitoring
- WalletStats for financial overview
Additionally, refactor the ExchangeRateService to improve encapsulation
and clean up the ExchangeRateHistory model by moving business logic
(change calculation and recording) from the model to the service layer.
Changes include:
- Removing deprecated helper methods from ExchangeRateHistory model
- Implementing direct queries in ExchangeRateService to replace model scopes
- Adding support for rate chart data retrieval
- Reordering and updating widget sorting in AdminPanelProvider
