feat(admin-ui): minimal React+Vite+TanStack scaffolding

- Vite 7 + React 19 + TanStack Router (file-based) + TanStack Query
- Tailwind v4 (CSS-first config, OKLCH brand colors)
- i18next + react-i18next с RU/EN switcher в header
- Axios client с Accept-Language interceptor + JWT placeholder
- 2 pages: /dictionaries (list cards) + /dictionaries/$name (records table)
- Dockerfile (node build + nginx serving + API proxy)
- README + .gitignore

Backend:
- Новый GET /api/v1/dictionaries в read-api (DictionaryListController),
  фильтрует по доступному scope через ScopeContext
- DictionaryListItem DTO без heavy schema_json

routeTree.gen.ts — stub; реальное содержимое генерится Vite plugin'ом при
первом 'pnpm dev'.

ordinis-admin-ui/src/routes/__root.tsx

@@ -0,0 +1,48 @@
+import { createRootRouteWithContext, Link, Outlet } from '@tanstack/react-router'
+import type { QueryClient } from '@tanstack/react-query'
+import { useTranslation } from 'react-i18next'
+
+export const Route = createRootRouteWithContext<{ queryClient: QueryClient }>()({
+  component: RootLayout,
+})
+
+function RootLayout() {
+  const { t, i18n } = useTranslation()
+  return (
+    <div className="min-h-full flex flex-col">
+      <header className="border-b border-zinc-200 bg-white">
+        <div className="max-w-6xl mx-auto px-6 py-4 flex items-center gap-6">
+          <Link to="/" className="font-semibold text-lg text-brand-700">
+            {t('app.title')}
+          </Link>
+          <nav className="flex gap-4 text-sm">
+            <Link
+              to="/dictionaries"
+              className="text-zinc-600 hover:text-brand-700"
+              activeProps={{ className: 'text-brand-700 font-medium' }}
+            >
+              {t('nav.dictionaries')}
+            </Link>
+          </nav>
+          <div className="ml-auto flex items-center gap-2 text-sm">
+            <button
+              onClick={() => i18n.changeLanguage('ru-RU')}
+              className={`px-2 py-1 rounded ${i18n.language === 'ru-RU' ? 'bg-brand-50 text-brand-700' : 'text-zinc-500'}`}
+            >
+              RU
+            </button>
+            <button
+              onClick={() => i18n.changeLanguage('en-US')}
+              className={`px-2 py-1 rounded ${i18n.language === 'en-US' ? 'bg-brand-50 text-brand-700' : 'text-zinc-500'}`}
+            >
+              EN
+            </button>
+          </div>
+        </div>
+      </header>
+      <main className="flex-1 max-w-6xl mx-auto w-full px-6 py-8">
+        <Outlet />
+      </main>
+    </div>
+  )
+}