src/routes/layout.tsx

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+import type { ReactNode } from "react";
+
+export default function RootLayout({ children }: { children: ReactNode }): JSX.Element {
+  return <>{children}</>;
+}

src/routes/page.tsx

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+// Placeholder route for 1A-2. Replaced by 1F-layout with the real root layout
+// (src/routes/layout.tsx + src/routes/[lang]/layout.tsx + error routes + smoke route).
+export default function Home() {
+  return (
+    <main>
+      <h1>Aeroflot Flights — React skeleton</h1>
+      <p>This page is a 1A-2 placeholder. Real routes land in 1F-layout.</p>
+    </main>
+  );
+}