css module not build in asset chunk with vite5 treeshakeing

[pejaz]

when i upgrede vite to vite5 ，my client css module file is not build in bundle asset 。but vite4 is work。
this is demo : https://stackblitz.com/edit/github-baaku4is?file=README.md
I'm not sure what changes in the treeshake strategy in vite5(rullup4) are causing it. I don't want to set treeshake:false。Is there a better solution?

now

1. use css module in layout/index.tsx
   
2. pnpm start & pnpm build
3. docs/build/asset/client-entry.css
   

expect

1. set treeshake:false in src/node/build.ts or degrade vite to vite4
   
2. rerun pnpm start & pnpm build
3. now css module is success build to bundle assets