fix: transpile @antfu/design in the Next hub build

Next/Turbopack has no loader for the bare .ts source @antfu/design
ships (utils/iconify.ts, now imported by design/dock-icon.ts) and
fails the production build with "Unknown module type". Add it to
transpilePackages so Next runs the package through its own transform,
matching how Vite already handles it.

Author: antfubot

examples/minimal-next-devframe-hub/src/client/next.config.mjs

@@ -1,6 +1,12 @@
 /** @type {import('next').NextConfig} */
 const nextConfig = {
   images: { unoptimized: true },
+  // @antfu/design ships raw, uncompiled `.ts`/`.vue` source (see its README —
+  // "no bundling, your build compiles it"). `dockIconSvg` (design/dock-icon.ts)
+  // imports its `utils/iconify.ts` directly, so Next/Turbopack — which
+  // otherwise treats node_modules as pre-built and has no loader for a bare
+  // `.ts` file there — needs to run this package through its own transform.
+  transpilePackages: ['@antfu/design'],
   // The workspace typecheck owns source-level project references.
   typescript: { ignoreBuildErrors: true },
   // Mounted devframe SPAs are served at `/__<id>/` and reference their assets