✨ feat(collaboration): add editor collaboration contract

[Innei]

💻 Change Type

• ✨ feat
• 🐛 fix
• ♻️ refactor
• 💄 style
• 🔨 chore
• 📝 docs

🔀 Description of Change

This PR adds the editor-level collaboration contract for Lexical/Yjs based collaboration.

• Adds the collaboration prop integration to Editor with a stable EditorCollaborationConfig type.
• Adds ReactCollaborationPlugin, Y.Doc binding helpers, user awareness initialization, cursor container ownership, bootstrap/hydrate behavior, and stale cursor sync recovery.
• Exports collaboration types from both package root and @lobehub/editor/react for business integration.
• Adds a behavior test for synchronizing Lexical updates through a shared Y.Doc.
• Adds a standalone Hono + Vite React business demo that covers workspace page rooms, first-open bootstrap, snapshot hydrate, re-enter, reconnect, read-only observer, complex nodes, and room reset.

📝 Additional Information

Validation performed:

• pnpm type-check
• pnpm exec vitest run --silent='passed-only' src/plugins/collaboration/__tests__/utils.test.ts
• pnpm build
• cd examples/collaboration-business-demo && pnpm type-check
• cd examples/collaboration-business-demo && pnpm build

No related issue was found for the collaboration API work.

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Project	Deployment	Actions	Updated (UTC)
lobe-editor	Ready	Preview, Comment	Jun 23, 2026 2:55pm

[github-actions]

👍 @Innei


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