proposal: adding the screenshot protection on/off switch directly in numpad

This is useful when you forget to switch it on and want to avoid the numpad keys lighting up on press and revealing the PIN.

<img width="1220" height="2611" alt="Image" src="https://github.com/user-attachments/assets/6b1df1ed-7230-416f-840b-280d9c064a05" />