Three files walk the AI state matrix through the real handlers: every
data route answers the baseline's data under each state, and an ECG
upload is stored with AI off; mixed reads null the model text, name the
reason and enqueue nothing, and the dashboard hides a cached briefing on
the next read after a switch flip; the briefing and Coach actions refuse
with the exact code, capability and reason before any provider or cache
write. Existing files that seeded provider-less accounts now give them a
provider where the briefing or the Coach is under test, and the sharing
front door marks the digest by a due checkup, since model text is not
served inside somebody else's record.
Refs #975
Marc-André Bombeck