chore: init

frontend/src/App.tsx

@@ -0,0 +1,16 @@
+import { APITester } from "./APITester";
+import "./index.css";
+
+export function App() {
+  return (
+    <div className="max-w-7xl mx-auto p-8 text-center relative z-10">
+      <div className="flex justify-center items-center gap-8 mb-8">
+      </div>
+
+      <h1 className="text-5xl font-bold my-4 leading-tight">React + Gin</h1>
+      <APITester />
+    </div>
+  );
+}
+
+export default App;