Add expense tracking system with receipt management and currency conversion

- Add expense list and detail views with filtering capabilities
- Implement receipt image viewer and PDF export functionality
- Add currency conversion support with automatic rate updates
- Create API endpoints for expense CRUD operations
- Integrate with NocoDB for expense data persistence
- Add expense menu item to dashboard navigation

server/tasks/currency-refresh.ts

@@ -0,0 +1,30 @@
+import { refreshExchangeRates } from '@/server/utils/currency';
+
+/**
+ * Scheduled task to refresh currency exchange rates hourly
+ * This should be called by a cron job or scheduled task runner
+ */
+export const refreshCurrencyRatesTask = async () => {
+  try {
+    console.log('[currency-refresh-task] Starting scheduled currency refresh...');
+    
+    const result = await refreshExchangeRates();
+    
+    if (result.success) {
+      console.log(`[currency-refresh-task] Successfully refreshed ${result.ratesCount} exchange rates`);
+    } else {
+      console.error('[currency-refresh-task] Failed to refresh exchange rates:', result.message);
+    }
+    
+    return result;
+  } catch (error) {
+    console.error('[currency-refresh-task] Error during scheduled refresh:', error);
+    return {
+      success: false,
+      message: 'Error occurred during scheduled refresh'
+    };
+  }
+};
+
+// For environments that support direct cron scheduling
+export default refreshCurrencyRatesTask;