[FR] Custom % Buttons

Would love to be able have the card display buttons with Customer %... For example, I have several windows that are 82" tall with 3 same-sized panes  I'd love to add two buttons, one for 33% and one for 66%.

<img width="1236" height="88" alt="Image" src="https://github.com/user-attachments/assets/6e46cc83-170b-420d-a5ef-a55af7fbe8dd" />