Fátima has run a neighbourhood furniture business in Rio de Janeiro for years with no website — just a Facebook page that had gone dormant since February 2022. She resells factory furniture, delivers it, and assembles it, and every sale already happened over WhatsApp. This was a paid client project on a tight budget where the demo had to come before the money.

The site is deliberately backend-less: a typed TypeScript catalogue in content/, no CMS, no database, no monthly bill. Every measurement is stored as a number in centimetres and formatted at the edge — never hand-typed as a display string — and every wa.me link is built by one function reading her real phone number from a single content module. Nothing outside lib/catalog/source.*.ts is allowed to import a Shopify type, which keeps a later Shopify upsell a one-module swap instead of a rewrite. Where a price wasn't confirmed, the page says so — 'Consulte o preço' — instead of shipping a plausible number.

Each layer has one job. Read it top to bottom — that's roughly the path a request takes through the system.

• A working demo built on the client's real brand — even before real stock exists — is what actually wins a tight-budget pitch, more than a polished mockup.
• Failing a production build outright on a known misconfiguration (SITE_URL resolving to localhost) catches a class of bug a real-device checklist would otherwise keep re-discovering.
• An honest 'Consulte o preço' is a better default than a plausible price, especially on a site the owner shows to her own customers.