fix(AuthContext): 🐛 updated Email Verification

[bbtgnn]

This should fix the issue of wrong url in verification emails.

The email template:

• is now selected from window.location.origin
• synced with the backend values found here: https://github.com/interfacerproject/zenflows/blob/7b0d263532377b35daab59a649aaf6af3a44d92b/src/zenflows/vf/person/domain.ex#L78