The today check now reads briefingGeneratedAt from the cached payload
and treats a payload without it as not from today. The integration
and e2e fixtures that seed a fresh briefing write it, as every real
generation does.
Adds the AI-optional journeys: the overview with AI switched off by the
operator and with no provider (no AI requests, no refusals, one setup
hint, remembered dismissal), and on an account of its own, withdrawing AI
consent deletes the stored briefing, and a hidden Coach's conversation is
read and deleted from Settings, AI.
Specs that drive AI surfaces against mocked routes now serve an available
capability map through /api/auth/me, since the web no longer assumes AI
is on until told otherwise.