Sync v2 SDK with preview bootstrap API

[rickeyswuave]

Summary

Sync the v2 SDK with the secure preview bootstrap API from vercel/v0#26583.

• Replaces the SDK OpenAPI snapshot with the exact file generated by the v0 PR.
• Regenerates the TypeScript SDK and AI SDK tools.
• Removes the obsolete fetchPreview proxy helper and exports.

Problem

The previous SDK modeled previews as a raw URL, token, and expiration. Its fetchPreview helper forwarded requests with x-v0-preview-token, but browser redirects and Next.js asset requests do not preserve that custom header without a full reverse proxy.

The v0 API now returns a nullable { url } containing a short-lived bootstrap URL, so the header-based SDK helper is no longer valid.

Solution

v0.chats.getPreview is regenerated with the new direct response:

const { data: preview } = await v0.chats.getPreview({ chatId })

Customers can redirect their authenticated iframe route to preview.url. The v0 preview gateway establishes the browser session, then the preview and its assets load directly from the preview origin.

The obsolete proxy helper, preview token header, refresh header, and related exports are removed.

Verification

• bun run generate
• bun run typecheck
• bun run build
• AI-tools tests: 6 passed
• Confirmed the SDK OpenAPI file matches vercel/v0#26583 exactly.
• Confirmed no fetchPreview, preview-token, or preview-refresh references remain.

[vercel]

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Project	Deployment	Actions	Updated (UTC)
v0-sdk-clone-demo	Error	Open in v0	Jul 10, 2026 5:13am
v0-sdk-playground	Error	Open in v0	Jul 10, 2026 5:13am
v0-sdk-simple-demo	Error	Open in v0	Jul 10, 2026 5:13am

[vercel]

Additional Suggestion:

Example reads preview.preview after the getPreview SDK response shape flattened to { url: string } | null, so it always returns null and breaks next build type checking.