PersonEditForm: PERSON vs INSTITUTION/GROUP visibility matrix (firstName,
title, alias, birth/deathYear toggle), lastName label switch, prop
hydration of all populated fields, fallback to PERSON for unknown type,
empty-string handling for null fields. 10 tests, ~30 branches.
SegmentationTrainingCard: trainingInfo null vs populated, block count
display, button disabled-state matrix (training × tooFewBlocks ×
serviceDown), too-few-blocks and service-down hints, success message
after a mocked fetch, training history heading. 10 tests, ~25 branches.
Refs #496.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
