#### PR Dependency Tree
* **PR #13029** 👈
This tree was auto-generated by
[Charcoal](https://github.com/danerwilliams/charcoal)
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## Summary by CodeRabbit
* **New Features**
* Added an option in user settings to enable or disable email
notifications for comments on your documents.
* Updated the user interface to include a toggle for comment email
notifications.
* Extended GraphQL queries and schema to support the new comment email
notification setting.
* **Localization**
* Added new English translations for comment email notification
settings.
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## Summary by CodeRabbit
* **New Features**
* Introduced new API endpoints and GraphQL queries to retrieve Copilot
chat sessions by workspace, document, and pinned status, with detailed
session and message information.
* Added support for filtering and querying Copilot chat histories with
new options such as pinned status and message ordering.
* **Bug Fixes**
* Improved filtering logic for listing and retrieving chat sessions,
ensuring accurate results for workspace, document, and pinned session
queries.
* **Tests**
* Expanded and refactored test coverage for session listing, filtering,
and new query options to ensure reliability and correctness of Copilot
session retrieval.
* Updated snapshot data to reflect new session types and filtering
capabilities.
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Close [AI-193](https://linear.app/affine-design/issue/AI-193)
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## Summary by CodeRabbit
- **New Features**
- Added support for streaming structured AI chat responses as objects,
enabling richer and more interactive chat experiences.
- Chat messages now include a new field displaying structured stream
objects, such as reasoning steps, text deltas, tool calls, and tool
results.
- GraphQL APIs and queries updated to expose these structured streaming
objects in chat histories.
- Introduced a new streaming chat endpoint for object-based responses.
- **Bug Fixes**
- Improved error handling for streaming responses to ensure more robust
and informative error reporting.
- **Refactor**
- Centralized and streamlined session preparation and streaming logic
for AI chat providers.
- Unified streaming setup across multiple AI model providers.
- **Tests**
- Extended test coverage for streaming object responses to ensure
reliability and correctness.
- **Documentation**
- Updated type definitions and schemas to reflect new streaming object
capabilities in both backend and frontend code.
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Co-authored-by: DarkSky <25152247+darkskygit@users.noreply.github.com>
Close [AI-86](https://linear.app/affine-design/issue/AI-86)
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## Summary by CodeRabbit
- **New Features**
- Improved chat session forking to allow creating a fork without specifying the latest message, enabling more flexible session management.
- **Bug Fixes**
- Forking a chat session with an invalid latest message ID now correctly returns an error.
- **Tests**
- Added and updated test cases to cover session forking with missing or invalid latest message IDs, ensuring robust behavior in these scenarios.
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fengmk2
