fix: infinite redirect loop for new signup page when user has incompleteUserDetails=true

[MayankBansal12]

Description:
Users with incompleteUserDetails=true are being caught in an infinite redirect loop when accessing the /new-signup page. This happens because both the backend (website-backend auth redirect) and the frontend login service (app/services/login.js) keep redirecting the user to the signup page, without checking if they are already on /new-signup.

Steps to reproduce:

1. Log in with a user that has incompleteUserDetails=true.
2. Attempt to access /new-signup.
3. Observe how the page keeps redirecting back to /new-signup, preventing the user from proceeding.

Cause:

• Backend redirects to new-signup page for users with incompleteUserDetails=true
• Frontend login service (login.js) also automatically redirects users with incompleteUserDetails=true to /new-signup, even if they're already there.