fix(esm): no need to set library type for web target

[chenjiahan]

Summary

This change removes the output.library.type: 'module' config when target is web.

The library.type: 'module' option is only needed when building libraries or Node.js applications. For web applications, it has no effect and may even cause unintended behavior.

Checklist

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

[netlify]

✅ Deploy Preview for rsbuild ready!

Name	Link
🔨 Latest commit	4184609
🔍 Latest deploy log	https://app.netlify.com/projects/rsbuild/deploys/68f79409aba2460008e75b38
😎 Deploy Preview	https://deploy-preview-6399--rsbuild.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.
Lighthouse	1 paths audited Performance: 56 (🔴 down 5 from production) Accessibility: 97 (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.

[Copilot]

Pull Request Overview

This PR fixes the ESM plugin configuration by removing the unnecessary output.library.type: 'module' setting for web targets, as this option is only needed for library or Node.js builds and has no effect (or may cause issues) in web applications.

Key changes:

• Added conditional logic to only set library.type: 'module' when the target is 'node'
• Removed the library type configuration from the general output chain that applies to all targets

---

_{Tip: Customize your code reviews with copilot-instructions.md. Create the file or learn how to get started.}