[REFACTOR] Fix login bug by handling expired or nonexisting cart for user

src/app/schema.ts

@@ -15,6 +15,12 @@ export const getNavigation = (
 ) => {
   if (isAuthenticated) {
     if (user.role === UserRole.CLIENT) {
+      if (!user.cart_id) {
+        return {
+          initialRoute: ROUTES.allAccessQuestionnaire,
+          navigation: unpaidClientNavigation,
+        };
+      }
       if ([TransactionStatus.UNPAID, null].includes(user.transaction_status)) {
         return {
           initialRoute: ROUTES.checkout,