fix: resolve all admin typecheck errors (typed api wrapper, unused imports, missing hooks, PermissionButton children)

apps/admin/src/layouts/MainLayout.tsx

@@ -266,6 +266,7 @@ const MainLayout: React.FC = () => {
               )
             }
             onClick={() => (isMobile || isTablet ? setDrawerOpen(true) : setCollapsed(!collapsed))}
+          />
           {isDesktop && <CampusSwitcher />}
           <div style={{ display: 'flex', alignItems: 'center', gap: 16 }}>
             <NotificationBell />