Monorepo skeleton, Prisma schema, core domain and services with tests

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

docs/design/landing-v2/README.md

@@ -0,0 +1,21 @@
+# Лендинг v2 · плотный — design reference
+
+This is a design mockup created in a visual design tool, exported as a
+standalone page. Treat it as a REFERENCE MOCKUP, not production code:
+the markup and inline styles carry the design's precise values — colors,
+font sizes, spacing, radii, shadows, layout — which an implementation
+should replicate faithfully in its own components and styling system
+rather than copy wholesale.
+
+## Contents
+
+- `MainV2.dc.html` — the artboard (a Design Component: an `<x-dc>`
+  template + a small logic class). The values to replicate live in its
+  inline `style="…"` attributes and the `<helmet><style>` block.
+- `support.js`, `vendor/react*.js` — the runtime that renders the
+  component in a browser; not part of the design.
+
+## Viewing
+
+Serve the folder (e.g. `python3 -m http.server`) and open `MainV2.dc.html`;
+some browsers block the scripts over file://.