fix: redirect www to non-www for Clerk CORS compatibility

Clerk proxy domain is configured for trycheatcode.com, so all www
requests need to be redirected to the non-www version.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <[email protected]>

Author: iamjr15

frontend/next.config.ts

@@ -13,6 +13,22 @@ const nextConfig: NextConfig = {
       },
     ],
   },
+  // Redirect www to non-www for Clerk compatibility
+  async redirects() {
+    return [
+      {
+        source: '/:path*',
+        has: [
+          {
+            type: 'host',
+            value: 'www.trycheatcode.com',
+          },
+        ],
+        destination: 'https://trycheatcode.com/:path*',
+        permanent: true,
+      },
+    ];
+  },
 };
 
 export default nextConfig;