Phase 2: Create admin UI for system configuration
- Add new /admin/settings route in frontend.go (protected by AdminMiddleware)
- Create admin_settings.templ with HTMX-powered form for base URL
- Add Settings link to admin sidebar navigation
- Admin settings form submits via HTMX to PUT /api/system/config
- Success message displays after save with updated form
The settings page allows admins to configure the base URL used for
device sync URLs, OPDS endpoints, and API access.
- Replace inline ternary operators with activeClass helper function
- Change layout containers from max-w-7xl to w-full for full-width design
- Update file path references in error messages for better debugging
- Create AdminSidebar component for admin panel navigation
- Support active state highlighting based on currentPath
- Consistent navigation across all admin pages
- Replaces duplicated sidebar markup in admin templates
john-okeefe