Improve application responsiveness and background processing

tests/unit/ui-poll.test.ts

@@ -43,6 +43,8 @@ describe('visible page polling', () => {
         stop = pollVisible(task, 1000, false);
         expect(task).not.toHaveBeenCalled();
         await vi.advanceTimersByTimeAsync(2000);
+        expect(task).toHaveBeenCalledTimes(1);
+        await vi.advanceTimersByTimeAsync(1000);
         expect(task).toHaveBeenCalledTimes(2);
     });
 });