Depth was hardcoded (3 ancestors, 2 descendants). Add a controls row to set
each direction independently — a slider plus a number stepper, with an "All"
toggle per direction — applied around whoever is currently focused.
- ancestor/descendant depth held in state; effective value is a large cap
when "All" is on (the chart only renders people that exist, so the cap is
free).
- changes apply to the live chart via setAncestryDepth/setProgenyDepth +
updateTree without a full rebuild.
- fan mode (ancestors only) takes the ancestor depth via its `generations`
prop, capped at 8 to avoid the radial layout's 2^n blow-up; its descendants
control is disabled with a note.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Signed-off-by: Justin Paul <justin@jpaul.me>
justin