The in-page find bar (absolute, z-20) and the resolve collapse bars
pinned at the timeline's top-0 (sticky, z-20) tied on z-index, so the
later-in-DOM collapse bar painted over the find bar, half-hiding it and
orphaning its close button. Raise the find bar to z-30 so the transient
overlay reliably paints above every sticky affordance in the content
column (comment headers z-10, collapse bars z-20).
Co-authored-by: multica-agent <github@multica.ai>
77003f40bc