Description

Related to #8888, WooPayments express checkout buttons, including WooPay, will integrate with the new buttonAttributes API for height and borderRadius. This will enable merchants to set button settings from the front-end.

Dark mode support will not be supported at this time on the recommendation that we re-look at extensions' overall needs for styling awareness so that button, BNPL offers, payments iframe components, and other can be styled and themed in a way that precisely respects a store's brand and visual look.

Acceptance criteria

• Integrate the ECE buttons with the height and borderRadius attributes
• Integrate WooPay buttons with the height and borderRadius attributes
• Height, not exceeding 55.0px, and button border radius are editable in FSE
• Changes made in FSE are reflected in the back-end settings

cc @bborman22 for awareness.