fix(clerk-js): Prevent session cookie removal during offline token refresh

[bratsos]

Description

When offline, two code paths in Session.ts emit token:update events with empty tokens. AuthCookieService interprets empty tokens as signed-out and removes the __session cookie — even though the session is still valid server-side. On the next page load or visibility change, the missing cookie makes the user appear signed out.

Checklist

• pnpm test runs as expected.
• pnpm build runs as expected.
• (If applicable) JSDoc comments have been added or updated for any package exports
• (If applicable) Documentation has been updated

Type of change

• 🐛 Bug fix
• 🌟 New feature
• 🔨 Breaking change
• 📖 Refactoring / dependency upgrade / documentation
• other:

[changeset-bot]

🦋 Changeset detected

Latest commit: d134aeb

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 3 packages

Name	Type
@clerk/clerk-js	Patch
@clerk/chrome-extension	Patch
@clerk/expo	Patch

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Project	Deployment	Actions	Updated (UTC)
clerk-js-sandbox	Ready	Preview, Comment	Feb 23, 2026 7:58pm

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commit: d134aeb

[jacekradko]

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