fix(usage): display usage tabs base on access permissions

src/pages/usage/index.tsx

@@ -25,7 +25,8 @@ import TokenTab from './token-tab';
 const Usage: React.FC = () => {
   const access = useAccess();
   const intl = useIntl();
-  // Land on the cross-resource Summary by default.
+
+  const canSeeGpuService = !!access?.canSeeGpuService;
   const [activeKey, setActiveKey] = useState<string>('summary');
 
   const items: TabsProps['items'] = useMemo(() => {
@@ -69,6 +70,12 @@ const Usage: React.FC = () => {
     });
   }, [intl, access.canSeeGpuService]);
 
+  // Only the Tokens tab is available — render it on its own without the
+  // single-item tab bar.
+  if (!canSeeGpuService) {
+    return <TokenTab />;
+  }
+
   return (
     <Tabs
       activeKey={activeKey}

src/utils/access-probes.ts

@@ -103,7 +103,7 @@ export const probeAccessFlags = async (): Promise<{
     probeHasKubernetesCluster(),
     probeHasResourceEvents()
   ]);
-  return { hasKubernetesCluster: false, hasResourceEvents: false };
+  return { hasKubernetesCluster, hasResourceEvents };
 };
 
 // Module-scoped marker for "did `getInitialState` actually run the access