KnowledgeView's own comment asked for this promotion once a second view grew the
panel. The sheet carries .dup-panel / .dup-empty,.dup-head / .dup-group /
.dup-members / .dup-member(+:hover) / .dup-score; each view keeps only its
extras (.dup-claimed, .dup-action).
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
