Experimental gui.

experimental/app/src/main.tsx

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+import { StrictMode } from 'react';
+import ReactDOM from 'react-dom/client';
+import { QueryClientProvider } from '@tanstack/react-query';
+import './index.css';
+import App from './App';
+import { ThemeProvider } from './contexts/ThemeContext';
+import { queryClient } from './lib/queryClient';
+import { ErrorBoundary } from './components/ErrorBoundary';
+
+const root = ReactDOM.createRoot(
+  document.getElementById('root') as HTMLElement
+);
+
+root.render(
+  <StrictMode>
+    <ErrorBoundary>
+      <QueryClientProvider client={queryClient}>
+        <ThemeProvider defaultTheme="light" storageKey="wild-central-theme">
+          <App />
+        </ThemeProvider>
+      </QueryClientProvider>
+    </ErrorBoundary>
+  </StrictMode>
+);