[sirreal]

Upgrades the 4.8 branch to Node.js 24.x and npm 11.x. Also:

• Runs Grunt with --no-maglev --no-concurrent-sparkplug, as r63771 does on trunk, to avoid hangs at exit on Node.js 24.
• Converts package-lock.json to lockfile version 3 with npm install --package-lock-only. No package path, version, resolved URL or integrity changes.

The build matches the 4.8.34 release except wp-includes/js/tinymce/wp-tinymce.js.gz, which compresses to different bytes with the same content.

Trac ticket: https://core.trac.wordpress.org/ticket/66636

Use of AI Tools

AI assistance: Yes
Tool(s): Claude Code
Model(s): Claude Opus 5.5
Used for: Applying the changes to each branch, building on Node.js 24 and comparing the output with the release, and drafting this description.

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This Pull Request is for code review only. Please keep all other discussion in the Trac ticket. Do not merge this Pull Request. See GitHub Pull Requests for Code Review in the Core Handbook for more details.

[github-actions]

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[github-actions]

The following accounts have interacted with this PR and/or linked issues. I will continue to update these lists as activity occurs.

Core Committers: Use this line as a base for the props when committing in SVN:

Props jonsurrell.

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