fix the errors in dashboard

apps/dashboard/next.config.js

@@ -23,8 +23,14 @@ const storagePatterns = [
   .filter(Boolean)
   .filter((p, i, arr) => arr.findIndex((q) => q.hostname === p.hostname && q.port === p.port) === i)
 
+// When the dashboard is accessed via the marketplace proxy (localhost:3000/dashboard),
+// the browser resolves _next/static chunk URLs relative to localhost:3000 — but those
+// chunks only exist on the dashboard's own server (localhost:3001). DASHBOARD_ASSET_PREFIX
+// makes Next.js embed absolute chunk URLs so the browser fetches them from the right port.
+// Set in .env.docker.dev; unset for local/production (where no cross-port proxy is used).
 const nextConfig = {
   basePath: '/dashboard',
+  ...(process.env.DASHBOARD_ASSET_PREFIX ? { assetPrefix: process.env.DASHBOARD_ASSET_PREFIX } : {}),
   images: {
     remotePatterns: [
       {