test(app-shell): hand the refresh handle out through an effect

The Home roster refresh case reassigned an outer variable during render,
which the React compiler lint rule refuses (Lint UI). The handle is now
filled from an effect on a holder object passed as a prop.

Co-Authored-By: Claude <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01L9qibvowqEy7Lkj2dKGw2i

Author: claude

ui/packages/app-shell/src/console/home/__tests__/homeObjectReads-29121.test.tsx

@@ -173,21 +173,24 @@ describe('Home asks for the objects it names, never the whole registry (objectst
   });
 
   it('outside an app, a refresh asks the roster’s names again in one ?names= request', async () => {
-    let refresh: ((type?: string) => Promise<void>) | undefined;
-    function RefreshHandle() {
-      refresh = useMetadata().refresh;
+    const handle: { refresh?: (type?: string) => Promise<void> } = {};
+    function RefreshHandle({ into }: { into: typeof handle }) {
+      const { refresh } = useMetadata();
+      React.useEffect(() => {
+        into.refresh = refresh;
+      }, [into, refresh]);
       return null;
     }
     const calls = mount(
       <>
-        <RefreshHandle />
+        <RefreshHandle into={handle} />
         <GateProbe />
       </>,
     );
     await waitFor(() => expect(screen.getByTestId('gate')).toHaveAttribute('data-cloud', 'false'));
     await settle();
     await act(async () => {
-      await refresh!('object');
+      await handle.refresh!('object');
     });
     await settle();
     expect(screen.getByTestId('gate')).toHaveAttribute('data-cloud', 'false');