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## Summary by CodeRabbit
* **Bug Fixes**
* Improved handling of aborted client connections during streaming,
ensuring that session messages accurately reflect if a request was
aborted.
* Enhanced consistency and reliability across all streaming endpoints
when saving session messages after streaming.
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fix AI-121
fix AI-118
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## Summary by CodeRabbit
- **Bug Fixes**
- Improved handling of connection closures and request abortion for
streaming and non-streaming chat endpoints, ensuring session data is
saved appropriately even if the connection is interrupted.
- **Refactor**
- Streamlined internal logic for managing request signals and connection
events, resulting in more robust and explicit session management during
streaming interactions.
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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>
fix AI-4
fix AI-18
better provider/model choose to allow fallback to similar models (e.g., self-hosted) when the provider is not fully configured
split functions of different output types
Close [AI-116](https://linear.app/affine-design/issue/AI-116)
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## Summary by CodeRabbit
- **New Features**
- Added support for specifying alternative AI models in chat prompts, enabling users to select from multiple available models.
- Expanded AI model options with new additions: 'gpt-4.1', 'o3', and 'claude-3-5-sonnet-20241022'.
- **Enhancements**
- Users can now optionally choose a specific AI model during chat interactions.
- Prompts and chat sessions reflect and support selection of alternative models where applicable.
- **Bug Fixes**
- Improved handling of prompt configuration defaults for better reliability.
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Support [AI-60](https://linear.app/affine-design/issue/AI-60).
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## Summary by CodeRabbit
- **Refactor**
- Updated naming conventions for the web search tool to ensure consistency across AI chat features.
- Simplified internal handling of web search tool options for a more streamlined experience.
- Unified parameter naming from "mustSearch" to "webSearch" across AI chat inputs and actions.
- **Chores**
- Removed unused configuration options related to web search from prompt settings.
- Added support for enabling or disabling web search via new parameters in chat requests.
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