0.24.1 — Section Divider editor controls match rendered defaults

Fixed

• Section Divider editor controls no longer default to a state the component
  never renders. The alignment dropdown defaulted to "Center" while an
  unedited divider rendered left-aligned, so choosing "Center" fired no change
  event and appeared to do nothing. The eyebrow / description visibility and
  hairline controls had the same per-variant disagreement. The editor's
  read-back now sources each per-variant default from the runtime
  :global(:root), so the controls reflect what the page actually shows.

Added

• Intrinsics are now a tested surface. Structural / display properties an
  editor drives outside the token grid (alignment, visibility, position) are
  declared as intrinsics: IntrinsicSpec[] and pinned to the runtime
  :global(:root) defaults by a universal contract test, so an editor default
  can't silently drift from what the component renders. IntrinsicSpec is
  exported from @motion-proto/live-tokens/component-editor.