- Family view gets a prominent "+ Add person" button that creates a person and
opens their page to fill in details (previously you could only add a person
via the empty-state form or by linking from another person).
- The person page's relationship picker (PersonCombobox) now offers
"+ Create '<typed name>'" when the person doesn't exist yet: it creates them,
links them in the chosen role (parent/child/partner/sibling), and jumps to
their new page to edit — no more create-then-go-back-and-link.
Frontend only — no migration.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>