style: clean up code formatting and remove trailing whitespace

refactor: reorganize imports and fix type imports

lib/currency-utils.ts

@@ -1,4 +1,4 @@
-import { Currency } from "@/types/currency";
+import type { Currency } from "@/types/currency";
 
 export function formatPrice(value: number, currency: Currency = "gp"): string {
   if (value >= 1000000) {