Delayed Screenshot

Add an option to enable a 5-second delay before taking a screenshot.

When enabled, the screenshot should be captured 5 seconds after pressing the screenshot button. When disabled, the screenshot should be taken immediately as usual.

<img width="789" height="390" alt="Image" src="https://github.com/user-attachments/assets/2511a839-0eda-40b3-9684-503b4ec3f011" />