docs: update spectrum-ts documentation for v4.2.0

[photon-action-bot]

Documentation Update: spectrum-ts v4.2.0

This PR updates documentation for spectrum-ts based on the v4.2.0 release.

Release Notes

New Features

• app.webhook() now handles both native Spectrum Cloud webhooks and Fusor webhooks through the same method. Native webhooks are HMAC-signed JSON and still arrive in your handler as the familiar (space, message) pair.

• Added webhookSecret support, with SPECTRUM_WEBHOOK_SECRET as a fallback, so native webhook signatures can be verified before your handler runs.

• Added first-party webhook adapters for Hono, Express, and Elysia: spectrum-ts/hono, spectrum-ts/express, and spectrum-ts/elysia. These mount the endpoint for you and handle raw request bodies correctly. 🔌

• Native webhook payloads now deserialize Spectrum content like text, attachments, contacts, rich links, reactions, and groups into normal SDK messages.

Bug Fixes

• Fixed webhook format detection to use the payload shape instead of X-Spectrum-Signature. Both native and Fusor deliveries can include that header, so this prevents valid Fusor webhooks from being routed incorrectly.

Improvement

• Added docs and tests for native webhooks, signature verification, payload deserialization, and the new framework plugins. This makes setup clearer and helps protect the raw-body behavior required for secure webhook verification. ✨

---

Version: 4.2.0

---

🤖 This PR was auto-generated by Claude Code via the update-docs action in buildspace.

---

^{Need help on this PR? Tag /codesmith with what you need. Autofix is disabled.}

[mintlify]

Preview deployment for your docs. Learn more about Mintlify Previews.

Project	Status	Preview	Updated (UTC)
Photon	🟡 Building	–	Jun 13, 2026, 9:19 AM

💡 Tip: Enable Workflows to automatically generate PRs for you.