fix(preview-server): localStoraget.getItem is not a function error

[gabrielmfern]

Fixing the error

 ⨯ TypeError: a.g.localStorage.getItem is not a function
    at bf (turbopack:///[project]/packages/preview-server/src/components/toolbar/use-cached-state.ts:6:45)
    at bh (turbopack:///[project]/packages/preview-server/src/components/toolbar.tsx:81:5)
  4 |   let value: T | undefined;
  5 |   if ('localStorage' in global) {
> 6 |     const storedValue = global.localStorage.getItem(key);
    |                                             ^
  7 |     if (storedValue !== null && storedValue !== 'undefined') {
  8 |       try {
  9 |         value = JSON.parse(storedValue) as T; {
  digest: '3099065385'
}

Only got this when using Node.js 25, so I'm assuming it's probably related. Can confirm the issue's gone after this when running locally.

---

Summary by cubic

Fix preview-server crash in Node.js 25 by guarding against non-function localStorage.getItem in useCachedState. This prevents the TypeError and lets the toolbar render without failing.

^{Written for commit b91cafc. Summary will update automatically on new commits.}

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Project	Deployment	Preview	Comments	Updated (UTC)
react-email	Ready	Preview	Comment	Nov 4, 2025 8:56pm
react-email-demo	Ready	Preview	Comment	Nov 4, 2025 8:56pm

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npm i https://pkg.pr.new/resend/react-email/@react-email/preview-server@2644

commit: 0a14261

[cubic-dev-ai]

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