feat(results): add resutls page

fix(leaderboard): fix leaderboard fetch logic

fix(test): fix navigation bug upon test quit

src/pages/student/Practice.tsx

@@ -24,6 +24,7 @@ export const Practice = () => {
   const navigate = useNavigate();
 
   const userXp = useExamConfigStore.getState().userXp;
+  console.log(userXp);
   return (
     <main className="h-fit max-w-7xl mx-auto px-8 sm:px-6 lg:px-8 py-8 space-y-4">
       <header className="flex justify-between items-center">