Can the app explain how it works?

A local db3 Studio demonstration now connects customers, bookings and classes with an activity view of what happens after a booking. It makes the data relationships and process outcomes inspectable in the same workspace.

Bookings persist in SQLite; duplicate bookings are rejected; a simulated failed confirmation can be retried without creating another booking. Capacity changes and an activity view make the rules and their consequences visible. Three automated tests, build checks and a browser walkthrough passed.

The wider cloud-sandbox architecture remained a direction, not something the demo quietly delivered. Email was simulated, and AI, authentication and cloud workspaces were not connected. The wider product direction preserves ordinary application code that can be exported and run elsewhere.