feat(legal): host the privacy policy and EULA at /privacy/ and /eula/

Author ui/legal/{privacy,eula}_ru.md, reworked from the source documents: the seller INN is unified (290210610742), contacts unified to the Telegram bot + email + postal address, the EULA governing-law clause leads with Russian law + jurisdiction as residence tiers, the single-binding-language clause is dropped, data collection is scoped to voluntary/support provision, and "Компания" is no longer shout-cased.

Serve both as static pages through the render sidecar, reusing a shared renderLegalHtml generalised from renderOfferHtml: new GET /privacy/ and GET /eula/ (301 from the slashless form), the markdown baked into the image, no backend fetch. Route them at the edge via the @legal caddy matcher with a CI probe asserting each page's canonical URL + the seller INN, so a missing route cannot silently fall through to the landing. Add the two links to the landing footer.

Docs baked in: ARCHITECTURE (renderer legal pages + edge routing), FUNCTIONAL (+_ru) footer, renderer/README routes. Tests: renderer legal.test.mjs, ui renderLegalHtml unit, landing footer e2e.

renderer/src/entry.ts

@@ -2,8 +2,9 @@
 // browser build unit-tests — so the sidecar runs them on the server. Bundled by `pnpm run bundle`
 // into dist/gameimage.mjs (type erasure only; the ui project type-checks the source):
 //   - drawGameImage + setAlphabet: the finished-game PNG export (POST /render).
-//   - renderOfferHtml: the public-offer page (GET /offer/) — the same renderer the landing build
-//     used to invoke, now server-side so the live catalog price list can be spliced in.
+//   - renderOfferHtml / renderLegalHtml: the public legal pages — GET /offer/ (with the live
+//     catalog price list spliced in), GET /privacy/ and GET /eula/ (static) — server-side so one
+//     renderer serves them all.
 export { drawGameImage, type RenderOptions } from '../../ui/src/lib/gameimage';
 export { setAlphabet } from '../../ui/src/lib/alphabet';
-export { renderOfferHtml } from '../../ui/src/lib/offer';
+export { renderOfferHtml, renderLegalHtml } from '../../ui/src/lib/offer';