fix(vite): inline styles for imports used only on server

[danielroe]

🔗 Linked issue

resolves https://github.com/nuxt/nuxt/issues/24480 resolves https://github.com/nuxt/nuxt/issues/25330

❓ Type of change

• [ ] 📖 Documentation (updates to the documentation, readme or JSdoc annotations)
• [x] 🐞 Bug fix (a non-breaking change that fixes an issue)
• [ ] 👌 Enhancement (improving an existing functionality like performance)
• [ ] ✨ New feature (a non-breaking change that adds functionality)
• [ ] 🧹 Chore (updates to the build process or auxiliary tools and libraries)
• [ ] ⚠️ Breaking change (fix or feature that would cause existing functionality to change)

📚 Description

Not quite sure why, but we were previously not extracting styles for components that didn't have a counterpart in the client build. This change avoids the early return, but needs some extra testing to see what I was thinking in https://github.com/nuxt/nuxt/pull/21573 🤔

It also needs a simple test.

📝 Checklist

• [x] I have linked an issue or discussion.
• [ ] I have added tests (if possible).
• [ ] I have updated the documentation accordingly.

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