Tornyn extensions

Admin-facing AI tooling. See docs/decisions/001-app-topology.md for the surface map.

Endpoints

• /widget/generate-program — Grist iframe target (also browsable directly for dev/demo).
• GET /api/health — health probe (reports LLM source + Grist mode).
• GET /api/clients — mock client roster with hasEnCurso flag.
• POST /api/generate — body { clientId, methodology?, stage?, notes? }; creates a new Borrador program.
• GET /api/programs/:id — read-back of a generated program and its rows.

For Thursday: this app reads/writes a deterministic in-memory mock of Grist (src/lib/grist-mock). The L3 live-Grist swap is a single change in src/lib/grist-mock/index.ts.