The admin panel uses a drill-down sidebar (#2216) with sections that expand inline — see Navigation Overview.Settings sidebar spacing and UX was refined in #1119 and #1854 for a cleaner hierarchy.
The admin top nav always shows the current community (#1141). Switching community updates the entire admin context — sidebar items rescope, content reloads.
The tab visibility setting is part of the community theme (see Community-Level Theming). Hide the Games tab for communities without games; hide Shop when you don’t have a points economy.