refactor(cli): code review cleanup fix for tab+tab (#18967)

packages/cli/src/ui/components/GeminiRespondingSpinner.test.tsx

@@ -33,10 +33,15 @@ describe('GeminiRespondingSpinner', () => {
   const mockUseIsScreenReaderEnabled = vi.mocked(useIsScreenReaderEnabled);
 
   beforeEach(() => {
+    vi.useFakeTimers();
     vi.clearAllMocks();
     mockUseIsScreenReaderEnabled.mockReturnValue(false);
   });
 
+  afterEach(() => {
+    vi.useRealTimers();
+  });
+
   it('renders spinner when responding', () => {
     mockUseStreamingContext.mockReturnValue(StreamingState.Responding);
     const { lastFrame } = render(<GeminiRespondingSpinner />);