Two small tree-view aids prompted by "why do some people show ×2".
- Legend: a hover/focus "Legend" link next to the "drag to pan…" hint, explaining
the ×N badge (a person drawn N times in the view because they connect through
more than one line — a shared ancestor or an intermarriage), the gender card
colors, and the pan/zoom/recenter controls.
- The ×N badge is now clearly clickable (cursor + hover state); clicking it
flashes every copy of that person in the current view (a bronze outline pulse),
so you can spot where else they appear. Implemented by delegating on the chart
container and matching the d3-bound person id across cards; capture-phase +
stopPropagation so a badge click flashes instead of recentering.
Frontend only. Honest follow-up: flashing finds copies that are on-screen; a true
"fly to an off-screen copy" needs d3-zoom transform work (the chart pans by
transform, not scroll) — a later enhancement.
Signed-off-by: Justin Paul <justin@jpaul.me>
justin