Refactor code to use the new 'id' function

frontend/src/utils/utils.ts

@@ -30,4 +30,8 @@ export function formatTime(dateString: string): string {
  */
 export function delay(ms: number): Promise<void> {
     return new Promise(resolve => setTimeout(resolve, ms));
+}
+
+export function id<T extends Element = HTMLElement>(id: string): T {
+    return document.getElementById(id) as unknown as T
 }