Add Command Center v2: DQ/RAG integration, S3 browser, Jupyter, GPU matrix.

Mirror mo/atc-GPU layout with config/, docs/, scripts/ for Gitea deploy.

ui/src/main.tsx

@@ -1,10 +1,20 @@
 import React from 'react'
 import ReactDOM from 'react-dom/client'
+import { QueryClient, QueryClientProvider } from '@tanstack/react-query'
 import App from './App'
-import './index.css'
+import { ThemeProvider } from './context/ThemeContext'
+import './styles/globals.css'
+
+const queryClient = new QueryClient({
+  defaultOptions: { queries: { retry: 1, staleTime: 10_000 } },
+})
 
 ReactDOM.createRoot(document.getElementById('root')!).render(
   <React.StrictMode>
-    <App />
+    <QueryClientProvider client={queryClient}>
+      <ThemeProvider>
+        <App />
+      </ThemeProvider>
+    </QueryClientProvider>
   </React.StrictMode>,
 )