fix(manifest): preserve pure css chunk assets

[sun0day]

Description

fix #14244

pureCssChunk will be removed totally with its importedAssets. Thus these importedAssets would be orphaned in the manifest.json.

This PR tries to preserve these importedAssets via attaching them with pureCssChunk's emitted css.

Additional context

---

What is the purpose of this pull request?

• Bug fix
• New Feature
• Documentation update
• Other

Before submitting the PR, please make sure you do the following

• Read the Contributing Guidelines.
• Read the Pull Request Guidelines and follow the PR Title Convention.
• Check that there isn't already a PR that solves the problem the same way to avoid creating a duplicate.
• Provide a description in this PR that addresses what the PR is solving, or reference the issue that it solves (e.g. fixes #123).
• Ideally, include relevant tests that fail without this PR but pass with it.

[stackblitz]

Run & review this pull request in StackBlitz Codeflow.

[sun0day]

Can you help check this PR in svelte-kit? Thanks @benmccann

[sapphi-red]

I wonder if it's possible to handle when removing the pure CSS chunk.

vite/packages/vite/src/node/plugins/css.ts

Lines 768 to 775 in 66a97be

	if (pureCssChunkNames.includes(file)) {
	const { importedCss } = (bundle[file] as OutputChunk)
	.viteMetadata!
	importedCss.forEach((file) =>
	chunk.viteMetadata!.importedCss.add(file),
	)
	return false
	}

[sun0day]

I wonder if it's possible to handle when removing the pure CSS chunk.

Yeah ,that would be more simple 👍

[benmccann]

Can you help check this PR in svelte-kit? Thanks @benmccann

Yes, I see SvelteKit generating the preload header tags when linked against this PR. Thank you so much for fixing this!!

[bluwy]

/ecosystem-ci run

[vite-ecosystem-ci]

📝 Ran ecosystem CI: Open

suite	result
analogjs	✅ success
astro	✅ success
histoire	❌ failure
ladle	❌ failure
laravel	✅ success
marko	✅ success
nuxt	✅ success
nx	✅ success
previewjs	✅ success
qwik	✅ success
rakkas	✅ success
sveltekit	✅ success
unocss	❌ failure
vite-plugin-pwa	✅ success
vite-plugin-ssr	✅ success
vite-plugin-react	✅ success
vite-plugin-react-pages	❌ failure
vite-plugin-react-swc	✅ success
vite-plugin-svelte	❌ failure
vite-plugin-vue	✅ success
vite-setup-catalogue	✅ success
vitepress	✅ success
vitest	✅ success

[bluwy]

Looks like the ones that passed in main also passed here.

[sapphi-red]

Thanks!