The plan review pane rendered both the document-adjacent and the action-rail
"Add comment to selection" triggers, so operators saw duplicate buttons. Delete
the document variant and its --document/--mobile CSS pair; the rail button is
now the single control at every breakpoint.
Selection capture also ran on every mid-drag selectionchange, which mounted and
unmounted the trigger as the user dragged. Gate quote writes between pointerdown
and pointerup inside the plan document so the control appears once, on release.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
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