feat(admin): Control Center redesign, Explore dual-view и полный RU/EN i18n

Refs EventHub/EventHubFrontAdmin#32

src/main.tsx

@@ -1,13 +1,19 @@
 import React from 'react';
 import ReactDOM from 'react-dom/client';
+import { Toaster } from 'sonner';
 import App from './App';
+import './index.css';
 import './i18n';
 import LocaleProvider from './components/LocaleProvider';
+import { initTableDensity } from './lib/density';
+
+initTableDensity();
 
 ReactDOM.createRoot(document.getElementById('root')!).render(
     <React.StrictMode>
         <LocaleProvider>
             <App />
+            <Toaster richColors position="top-right" />
         </LocaleProvider>
     </React.StrictMode>
 );