Fix TypeScript config property for Next.js 16 build

client/next.config.ts

@@ -1,10 +1,7 @@
 import type { NextConfig } from "next";
 
 const nextConfig: NextConfig = {
-  devIndicators: {
-    appIsrStatus: false,
-    buildActivity: false,
-  },
+
   output: 'standalone',
 };