test(deps): update next to 16.1.7

[MikeMcC399]

Situation

npm audit shows multiple moderate severity vulnerabilities in examples/nextjs

$ npm audit
# npm audit report

next  10.0.0 - 16.1.6
Severity: moderate
Next.js: null origin can bypass Server Actions CSRF checks - https://github.com/advisories/GHSA-mq59-m269-xvcx
Next.js: null origin can bypass dev HMR websocket CSRF checks - https://github.com/advisories/GHSA-jcc7-9wpm-mj36
Next.js: HTTP request smuggling in rewrites - https://github.com/advisories/GHSA-ggv3-7p47-pfv8
Next.js: Unbounded next/image disk cache growth can exhaust storage - https://github.com/advisories/GHSA-3x4c-7xq6-9pq8
Next.js: Unbounded postponed resume buffering can lead to DoS - https://github.com/advisories/GHSA-h27x-g6w4-24gq
fix available via `npm audit fix`
node_modules/next

1 moderate severity vulnerability

To address all issues, run:
  npm audit fix

Change

Update next to 16.1.7 which is a backport of bug fixes

---

Note

Medium Risk
Dependency-only changes, but it upgrades next/Tailwind tooling and updates the lockfile, including new/changed transitive packages and a higher Node engine requirement in @tailwindcss/oxide that could affect CI/runtime compatibility for the example.

Overview
Updates the examples/nextjs app to next@^16.1.7 (to pick up the latest patch fixes/security advisories) and bumps @tailwindcss/postcss to ^4.2.1.

Regenerates package-lock.json accordingly, pulling in updated transitive versions (e.g., Tailwind oxide/node, lightningcss, postcss, @types/node) and reflecting the @tailwindcss/oxide Node engine change to >=20.

^{Written by Cursor Bugbot for commit 19703b2. This will update automatically on new commits. Configure here.}

[cypress-app-bot]

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[github-actions]

🎉 This PR is included in version 7.1.8 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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