test(cli): refactor tests for async render utilities (#23252)

packages/cli/src/ui/hooks/useGeminiStream.test.tsx

@@ -3249,6 +3249,10 @@ describe('useGeminiStream', () => {
         ),
       );
 
+      // Reset start time after hook render, because renderHook (async)
+      // advances fake timers by 50ms during its internal waitUntilReady() check.
+      vi.setSystemTime(startTime);
+
       // Submit query
       await act(async () => {
         await result.current.submitQuery('Test query');