migrated from auth.js to clerk; some ui remake; added expense-card

src/lib/utils/index.ts

@@ -16,3 +16,5 @@ export function debounce<T extends (...args: any[]) => void>(
     timeoutId = setTimeout(() => func(...args), delay);
   };
 }
+
+export const getAmount = (amount: number) => `${amount.toFixed(2)}€`;