- Fetch user profile from nostr relay on login
- Display NIP-05, display name, or username instead of public key
- Priority: NIP-05 > name > username > public key
- Add WebSocket connection to fetch profile events (kind 0)
- Update Login component to fetch and pass profile data
- Update Bookmarks component to show user-friendly display name
- Fallback to formatted public key if no profile available
- Improve user experience with recognizable identity
