- tribes_view: renderInvitePage now shows QR of the invite code
- invites_view: snhInvite box shows QR of pub invite code
- inhabitants_view: user profile shows QR of SSB ID (own card + profile view)
- style.css: add QR code styles
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
