plan: align Sprint 7-10 with TZ requirements (roles, API, experiments)

Added missing sprints from TZ spec:
- Sprint 7: Auth (viewer/editor roles, JWT, login, FT-60-64)
- Sprint 8: Real data integration (NestJS proxy → oclinica.ru, FT-41, INT-01-04)
- Sprint 9: Experiments — duplicate button, attribute editor, status workflow (FT-50-56)
- Sprint 10: Final polish, backend deploy

Sprint 6 expanded to all pages (prices, contacts, doctor profile).
Sidebar: Experiments section → "Дубли компонентов / Дубли страниц"

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

apps/web/components/layout/Sidebar.tsx

@@ -67,10 +67,10 @@ const NAV: NavSection[] = [
     ],
   },
   {
-    title: "Варианты и дубли",
+    title: "Эксперименты",
     items: [
-      { label: "Варианты блоков", href: "/variants/blocks", soon: true },
-      { label: "Варианты страниц", href: "/variants/pages", soon: true },
+      { label: "Дубли компонентов", href: "/variants/blocks", soon: true },
+      { label: "Дубли страниц", href: "/variants/pages", soon: true },
     ],
   },
 ];