Implement Google SSO One-Tap Pop-up

🔍 Problem Statement

Despite having Google SSO implemented, the One‑Tap prompt isn’t appearing as expected. Google One‑Tap is known to increase registration rates significantly by streamlining the sign-up process—providing a seamless experience where users can register “without really noticing”

💡 Story

As a business owner, I want the Google One-Tap prompt to appear seamlessly for users during login or registration, so that users can sign up or sign in instantly—with minimal friction—boosting registration conversion rates and overall engagement.

🎯 Definition of Done (DoD)

A feature is done when:

✔️ An unauthenticated user visits the site, the account has a valid Google App ID (Web), and the admin has enabled the “Enable Google One-Tap Login” checkbox → the Google One-Tap prompt appears.

✔️ The One-Tap prompt appears, the user clicks “Continue” → if the user already exists in Pelcro, they are logged in immediately; if the user is new, they are registered as a new customer in Pelcro.

✔️ The One-Tap prompt appears, the user dismisses it → the standard Pelcro login/registration modal is displayed.

✔️ The admin has not enabled the checkbox or the App ID is invalid/missing, and an unauthenticated user visits the site → the One-Tap prompt does not render, and the existing Pelcro login flow is used.