Revert "Update UserContext to use util parseJwt"

This reverts commit fc9db08.

Author: jmsandiegoo

frontend/src/contexts/UserContext.tsx

@@ -1,6 +1,5 @@
 "use client";
 
-import { parseJwt } from "@/lib/auth";
 import {
   AccessToken,
   AccessTokenPayload,
@@ -35,3 +34,17 @@ export function UserProvider({ children }: PropsWithChildren) {
 export function useUser() {
   return useContext(UserContext);
 }
+
+function parseJwt(token: AccessToken): AccessTokenPayload {
+  const base64Url = token.split(".")[1];
+  const base64 = base64Url.replace(/-/g, "+").replace(/_/g, "/");
+  const jsonPayload = decodeURIComponent(
+    atob(base64)
+      .split("")
+      .map((c) => {
+        return "%" + ("00" + c.charCodeAt(0).toString(16)).slice(-2);
+      })
+      .join("")
+  );
+  return AccessTokenPayloadSchema.parse(JSON.parse(jsonPayload));
+}