fix(rsc): keep server stylesheet link for hmr and avoid injecting css via client js

[hi-ogawa]

Description

• Related Avoid duplicate css during dev due to server rendered <link> and client inline <style> #677
• Closes Local font double flashes during dev #836
• Closes chore(rsc): test font double flash issues #837

As we've seen in #776, Vite can actually handle css hmr by replacing <link rel="stylesheet" ... /> https://github.com/vitejs/vite/blob/84079a84ad94de4c1ef4f1bdb2ab448ff2c01196/packages/vite/src/client/client.ts#L200-L201. We've been adding separate import ".../xxx.css" via wrapper client js importer-resources?rsc-browser virtual for hmr, but that should be unnecessary.

TODO

• deal with css module refactor(rsc): self-accept css module direct request module on client environment #842
  • this is because we forcefully filter out .module.css?direct during hotUpdate. Also otherwise, it would cause full reload.
• adjust test cases
• verify this actually fixes Avoid duplicate css during dev due to server rendered <link> and client inline <style> #677
• ecosystem ci
  • https://github.com/vitejs/vite-ecosystem-ci/actions/runs/17668286043 (waku)
  • https://github.com/vitejs/vite-ecosystem-ci/actions/runs/17668283303 (react-router)

[pkg-pr-new]

Open in StackBlitz

npm i https://pkg.pr.new/@vitejs/plugin-react@841 

npm i https://pkg.pr.new/@vitejs/plugin-react-oxc@841 

npm i https://pkg.pr.new/@vitejs/plugin-rsc@841 

npm i https://pkg.pr.new/@vitejs/plugin-react-swc@841 

commit: 559e3b2