Six specs over the P2 surface: the review-first draft that only writes on
an explicit save (never auto-committed), the transient summary panel with
its not-saved / not-a-diagnosis note, whole-word content search reaching a
body-only word through the real blind-token index union, the corpus
index-all backfill CTA, the provider-unavailable settings pointer, and the
text-mode image-only refusal that fires before any OCR. The vault fixture
gains a seeded content-index row (tokens hashed under the same HKDF subkey
the server derives) plus a bland assist probe document.
