Review follow-up (Sara): the prior single-owner evidence was two separate unit facts against an inert DOM stub. This renders a real AnnotationShape, attaches the live transcribeShortcuts action, focuses the region, and presses Delete once — asserting deleteCurrentRegion fires exactly once. A genuine integration guard against re-introducing a double-bind. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>