perf: do not emit assets in SSR

[SoonIter]

Summary

optimize the performance, a little bit

Related Issue

Checklist

• Tests updated (or not required).
• Documentation updated (or not required).

[netlify]

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Lighthouse	1 paths audited Performance: 94 (🟢 up 21 from production) Accessibility: 97 (no change from production) Best Practices: 92 (no change from production) SEO: 92 (no change from production) PWA: - View the detailed breakdown and full score reports

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[chenjiahan]

👍🏻