add turbopack resolveAlias fs fallback for nextjs 16 (#58390)

Author: rsese

empty.ts

@@ -0,0 +1,3 @@
+// Empty module to satisfy Turbopack resolveAlias fallback for Node.js modules
+// See turbopack config in next.config.ts
+export default {}

next.config.ts

@@ -47,9 +47,21 @@ const config: NextConfig = {
       }
     })
   },
+
   // Turbopack is the default bundler in Next.js 16
   // Keep webpack config for now to support both bundlers
-  turbopack: {},
+
+  // Turbopack configuration for Next.js 16 (replaces webpack fallbacks)
+  turbopack: {
+    resolveAlias: {
+      fs: {
+        browser: './empty.ts', // Point to empty module when fs is requested for browser
+      },
+      async_hooks: {
+        browser: './empty.ts', // Point to empty module when async_hooks is requested for browser
+      },
+    },
+  },
 
   webpack: (webpackConfig) => {
     webpackConfig.experiments = webpackConfig.experiments || {}