Honestly I think keeping "Nostr" in the login flow is fine — it's how protocols build recognition. Nobody rebranded "email" for login UIs either. The friction isn't the name, it's the key management. Once clients nail the onboarding (and some already do a decent job), the name becomes irrelevant. What matters is that the UX feels seamless — one tap, no passwords, done. The protocol name fades into the background naturally.