Description

We need a straightforward username registration flow, available in gnoweb with some guardrails on what the registration system accepts as usernames.

Acceptance Criteria

• Allow users to register usernames with a simple, intuitive flow in the gnoweb frontend
• Validate the username input:
  • Alphabetic characters only (lowercase Latin)
  • Disallow usernames starting with g1
  • Disallow usernames starting with gl
• Return an error if the username input is invalid