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- New includes/nav.php: sticky site-wide nav with Tools dropdown, Dashboard link, compact language switcher, user identity → /account.php, Log out - New account.php: credits & plan, profile, team, usage sections - New api/corpus-summary.php: JSON endpoint for corpus doc count + last updated - Replaces topbar in layout.php, layout_dashboard.php, and dashboard.php - Fixes hardcoded Norwegian strings in dashboard.php credit cards via dbnToolsT() - Adds 35 new i18n keys across all 4 languages (en/no/uk/pl) in i18n.php - CSS: .dbn-nav navbar + .account-* account page styles in tools.css Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>