chore: Update Next.js to 15.5.8 and regenerate package-lock.json files in example apps

[Copilot]

Description

Updates Next.js from ^15.5.7 to ^15.5.8 across 17 example applications and regenerates 8 package-lock.json files to address GHSA-mwv6-3258-q52c (high severity DoS vulnerability in Server Components).

Changes made:

• Updated Next.js version in package.json files from ^15.5.7 (or ^15.5.2 in one case) to ^15.5.8
• Regenerated package-lock.json files to reflect the Next.js update (now referencing Next.js 15.5.9)
• All npm installs completed with 0 vulnerabilities

Affected directories:

• examples/next/*/example-app (12 apps)
• plugins/hwp-previews/examples/*/example-app (2 apps)
• plugins/wpgraphql-webhooks/examples/webhooks-isr/example-app
• plugins/wpgraphql-logging/examples/wpgraphql-logging-nextjs/example-app
• packages/toolbar/examples/next/example-app

Related Issue

Dependant PRs

Type of Change

• ✅ Bug fix (non-breaking change which fixes an issue)
• ✨ New feature (non-breaking change which adds functionality)
• 💥 Breaking change (fix or feature that would cause existing functionality to change)
• 🧹 Code refactoring (no functional changes)
• 📄 Example update (no functional changes)
• 📝 Documentation update
• 🔍 Performance improvement
• 🧪 Test update

How Has This Been Tested?

Version number updates and package-lock.json regeneration. All npm installs completed successfully with 0 vulnerabilities reported. No functional changes to test.

Screenshots

Checklist

• I have read the CONTRIBUTING document
• My code follows the project's coding standards
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation (if applicable)
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works (if applicable)
• Any dependent changes have been highlighted, merged or published

Original prompt

---

This section details on the original issue you should resolve

<issue_title>chore: Update Next.js for examples</issue_title>
<issue_description># Overview

Regenerate package-lock files under examples/**/example-app, where Nextjs is present.

GHSA-mwv6-3258-q52c</issue_description>

<agent_instructions>In order to resolve security vulnerabilities caused by Next.js, we need to upgrade Next.js versions. Here is the non exhaustive list of the directories, where package-lock file needs to be regenerated:

"plugins/hwp-previews/examples/hwp-preview-rest/example-app"
"examples/next/client-multisite-app-router-fetch-data/example-app"
"examples/next/hybrid-sitemap-apollo/example-app"
"plugins/wpgraphql-webhooks/examples/webhooks-isr/example-app"
"examples/next/proxied-sitemap-apollo/example-app"
"packages/toolbar/examples/next/example-app"
"examples/next/client-app-router-fetch-data/example-app"
"examples/next/apollo-client-data-fetch/example-app"</agent_instructions>

Comments on the Issue (you are @copilot in this section)

• Fixes chore: Update Next.js for examples #554

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[changeset-bot]

⚠️ No Changeset found

Latest commit: ed8da5d

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

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[github-actions]

📦 Plugin Artifacts Ready!

Download from GitHub Actions run

Available plugins:

• ✅ hwp-previews.zip
• ✅ wpgraphql-logging.zip
• ✅ wpgraphql-webhooks.zip

See the "Artifacts" section at the bottom of the Actions run page

[ahuseyn]

@copilot we also need package-lock.json files to reflect the recent Nextjs update

[Copilot]

@copilot we also need package-lock.json files to reflect the recent Nextjs update

Done! Regenerated all 8 package-lock.json files for the Next.js example apps. All packages installed successfully with 0 vulnerabilities. The lock files now reference Next.js 15.5.9. (commit ed8da5d)