docs: align dev config JSDoc with documentation

[chenjiahan]

Summary

• update dev configuration JSDoc to match current documentation defaults
• clarify lazy compilation, asset prefix, CLI shortcuts, and watch files comments

Testing

• not run

---

Codex Task

[netlify[bot]]

✅ Deploy Preview for rsbuild ready!

Name	Link
🔨 Latest commit	046ed2586b2ee4b4386c4c4f195365735af94864
🔍 Latest deploy log	https://app.netlify.com/projects/rsbuild/deploys/69186418dbaa1a0008f2bcf1
😎 Deploy Preview	https://deploy-preview-6586--rsbuild.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.
Lighthouse	1 paths audited Performance: 66 (🔴 down 5 from production) Accessibility: 100 (no change from production) Best Practices: 100 (no change from production) SEO: 100 (no change from production) PWA: 60 (no change from production) View the detailed breakdown and full score reports

---

To edit notification comments on pull requests, go to your Netlify project configuration.