When The AI Approval Badge Was A Lie — spoolcast dev log 12

A bright green "Approved" badge showed up on a completely blank, crashed screen — the interface was guessing the pipeline's state instead of knowing it. This dev log tears out a 5,000-line UI file and a type-checker that was validating nothing, then rebuilds around a single engine-owned source of truth so the interface can't pretend a step is done when it isn't.