feat: add cryptographic utilities and types for secure data handling

webapp/src/main.tsx

@@ -0,0 +1,20 @@
+import { render } from 'preact';
+import { QueryClient, QueryClientProvider } from '@tanstack/react-query';
+import App from './App';
+import './styles.css';
+
+const queryClient = new QueryClient({
+  defaultOptions: {
+    queries: {
+      retry: 1,
+      refetchOnWindowFocus: false,
+    },
+  },
+});
+
+render(
+  <QueryClientProvider client={queryClient}>
+    <App />
+  </QueryClientProvider>,
+  document.getElementById('root')!
+);