The brandingName admin setting was saved but never used — layout/login/register
hardcoded "Bounty Board". render() now passes the configured brand into every
page, and the top-nav masthead, <title>, and login/register headers use it.
(The "Bounty Board" board-feature labels are left as-is.)
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>