vite

* replace next with vite
* disable strictmode (it interferes with collaboration in dev mode)

client/src/components/providers/tanstack-provider.tsx

@@ -0,0 +1,19 @@
+import { QueryClient, QueryClientProvider } from '@tanstack/react-query';
+import React from 'react';
+
+const queryClient = new QueryClient({
+  defaultOptions: {
+    queries: {
+      refetchOnMount: false,
+      refetchOnWindowFocus: false,
+    },
+  },
+});
+
+export function TanstackProvider({ children }: React.PropsWithChildren) {
+  return (
+    <QueryClientProvider client={queryClient}>
+      {children}
+    </QueryClientProvider>
+  );
+}