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.

ui/src/Landing.svelte

@@ -126,11 +126,15 @@
 
   <footer class="ft">
     <span class="legal">
-      <a class="offer" href="/offer/">{t('landing.offer')}</a>
+      <a class="doc" href="/eula/">{t('landing.eula')}</a>
       <span class="sep" aria-hidden="true">|</span>
-      <!-- The feedback bot: the same Telegram contact the offer lists (section 11 «Реквизиты»);
+      <a class="doc" href="/privacy/">{t('landing.privacy')}</a>
+      <span class="sep" aria-hidden="true">|</span>
+      <a class="doc" href="/offer/">{t('landing.offer')}</a>
+      <span class="sep" aria-hidden="true">|</span>
+      <!-- The feedback bot: the Telegram contact the legal documents list as the seller's contact;
            external, opens in a new tab. -->
-      <a class="offer" href="https://t.me/Erudit_GameBot" target="_blank" rel="noopener noreferrer">{t('landing.feedback')}</a>
+      <a class="doc" href="https://t.me/Erudit_GameBot" target="_blank" rel="noopener noreferrer">{t('landing.feedback')}</a>
     </span>
     <span>{t('about.version', { v: __APP_VERSION__ })}</span>
   </footer>
@@ -295,16 +299,18 @@
   }
   .ft .legal {
     display: flex;
+    flex-wrap: wrap;
+    justify-content: center;
     align-items: center;
     gap: 8px;
   }
   .ft .sep {
     color: var(--text-muted);
   }
-  .ft .offer {
+  .ft .doc {
     color: inherit;
   }
-  .ft .offer:hover {
+  .ft .doc:hover {
     color: var(--accent);
   }
 </style>