Why the Background Pro tab UI became a reusable `tabs` option type
The question: The Scroll Keyframes control renders its Start, Middle (optional) and End states as one tall stack of sliders — you scroll the modal to reach the End state. Those three states are the textbook case for tabs. The framework already has a tab container type. So: use that, or build a new tabs option type by extracting the compact tab strip Background Pro already uses internally?
