fix: Allow local.statbus.org as dev origin to suppress cross-origin warning

Next.js 16 warns on cross-origin requests from local.statbus.org to
/_next/* resources. Add allowedDevOrigins to silence this warning.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: jhf

app/next.config.js

@@ -43,6 +43,9 @@ const nextConfig = {
   reactStrictMode: true,
   // output: 'standalone' is primarily for production builds.
   // Set it conditionally to avoid potential interference with dev server features like proxying.
+  ...(isDevelopment && {
+    allowedDevOrigins: ['local.statbus.org'],
+  }),
 };
 
 if (!isDevelopment) {