- Create dashboard_base.html: standalone app shell with 56px sticky header (logo + user email + sign out), 220px left sidebar with Overview/Countries/Settings nav items (SVG icons, active state via request.path), and fixed mobile bottom tab bar (md:hidden) - Add CSS component classes: .app-shell, .app-header, .app-sidebar, .sidebar-item, .app-content, .mobile-bottom-nav, .mobile-nav-item - Extract feedback widget into _feedback_widget.html partial; include from both base.html and dashboard_base.html - Switch index.html, countries.html, settings.html to extend dashboard_base.html; remove <main class="container-page"> wrappers - Remove "Back to Dashboard" button from countries.html (sidebar provides persistent navigation) Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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