When a reference's target illustration isn't seeded yet (load-time index
miss → categoryId null), clicking it now calls a new resolve endpoint that
drills the relevant main-group root (its external_id = the code's first
digit; the illustration is a direct child) and re-resolves. One PL24 call in
the common case, bounded + cached; falls back to pre-filled search if not
found. UI shows a spinner on the button while drilling.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Semih Yesilyurt
c440252aa3