I can test later today, I'll update with results.
Discussion
Still get a spinning 'Signing in' response.
1. Login with Nostr
2. Paste nsec bunker token
3. Click login
4. Amber prompts for permission to sign events
5. Approve, manual approval for events/actions
6. Amber then prompts for http auth
7. Approve
8. Stuck at 'Signing in'
The timeout seems to occur somewhere between steps 5 and 8 in the flow.