Onboarding now opens a trial step that collects a card through Stripe checkout before the brain is enabled, with a timeline showing today's $0, the day-12 reminder, and the day-14 charge.
- Only leaves the card step once the API confirms the trial is live
- Brain home shows a setup banner and dims what the trial unlocks
- Recovers orgs that abandoned checkout instead of stranding them
- Adds the organization ID to account settings, copyable from the label
