Clearer invite onboarding: create account then accept invite

Problem
When a collaborator is invited to a Consent Studio domain, the invite often lands them on a login screen asking for email and password. Invited users who do not have an account yet do not understand that they must first use New to Consent Studio? create an account, create a password, and only then accept the pending invite.

Context
Partners hit this repeatedly while onboarding end customers. They end up coaching people through the create-account step manually.

Requested improvement
Make the invite / accept-invite path obvious for new users: a clear create-account route when no account exists, then accept the invite, without requiring partner hand-holding.