#### PR Dependency Tree
* **PR #14452** 👈
This tree was auto-generated by
[Charcoal](https://github.com/danerwilliams/charcoal)
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## Summary by CodeRabbit
* **Bug Fixes**
* Improved null-safety, dependency tracking, upload validation, and
error logging for more reliable uploads, clipboard, calendar linking,
telemetry, PDF/theme printing, and preview/zoom behavior.
* Tightened handling of all-day calendar events (missing date now
reported).
* **Deprecations**
* Removed deprecated RadioButton and RadioButtonGroup; use RadioGroup.
* **Chores**
* Unified and upgraded linting/config, reorganized imports, and
standardized binary handling for more consistent builds and tooling.
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## Summary by CodeRabbit
* **Bug Fixes**
* Robustly sanitize session titles, messages, attachments, and embedded
data to remove invalid/null characters and prevent corrupt persistence.
* Improve chat title generation to skip or recover from invalid input
and log contextual errors without crashing.
* Add more detailed storage and workspace logs and reduce repetitive
checks to aid troubleshooting and stability.
<sub>✏️ Tip: You can customize this high-level summary in your review
settings.</sub>
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## Summary by CodeRabbit
* **Bug Fixes**
* Resolved occasional errors when removing document links from sessions,
ensuring cleanup completes reliably.
* Improved reliability during maintenance actions by preventing
unnecessary validation failures in system-initiated updates, while
preserving existing checks for user-initiated changes.
* **Chores**
* Internal adjustments to the session update flow to better support
maintenance operations without affecting user-facing behavior.
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fix AI-419
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## Summary by CodeRabbit
- New Features
- New API to fetch available models for a prompt, returning default,
optional, and pro models with human‑readable names.
- Added temperature and topP settings to prompt configuration for finer
control.
- Refactor
- When no model is chosen, the default model is used instead of
auto-picking a pro model.
- Model metadata across providers now includes readable names, improving
listings and selection UX.
- Tests
- Updated test snapshots and descriptions to reflect the new
default-model behavior.
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## Summary by CodeRabbit
* **New Features**
* Error messages for unavailable copilot providers now include specific
model IDs for clearer context.
* Added new detailed error messages for embedding generation failures
specifying provider and error details.
* The API and GraphQL schema have been extended with new error types
reflecting these detailed error cases.
* **Bug Fixes**
* Enhanced error handling to detect and report incomplete or missing
embeddings from providers.
* Added safeguards to skip embedding insertions when no embeddings are
provided, preventing unnecessary processing.
* **Documentation**
* Updated localization and translation keys to support dynamic error
messages with model IDs and provider details.
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## Summary by CodeRabbit
* **New Features**
* Sessions associated with a deleted document are now automatically
updated to remove the document reference.
* **Improvements**
* Enhanced session management to better handle documents that have been
deleted.
No visible changes to the user interface; these updates improve backend
handling of session and document relationships.
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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-163
fix AI-164
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## Summary by CodeRabbit
- **Tests**
- Added a new test to verify multi-turn chat interactions, ensuring accurate handling of chat history and correct responses for translation and explanation requests.
- **Bug Fixes**
- Improved chat session logic to better merge user messages and attachments, enhancing the accuracy and continuity of multi-step conversations.
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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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fix AI-14
fix AI-17
fix AI-39
fix AI-112
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## Summary by CodeRabbit
- **New Features**
- Expanded and reorganized prompt options for text and image actions, adding new prompts for image generation, style conversions, upscaling, background removal, and sticker creation.
- Enhanced image editing capabilities with direct support for image attachments in prompts.
- **Improvements**
- Updated prompt names and descriptions to be more user-friendly and descriptive.
- Simplified and clarified prompt selection and image processing workflows with improved default behaviors.
- Better organization of prompts through clear grouping and categorization.
- **Bug Fixes**
- Improved validation and handling of image attachments during editing requests.
- **Refactor**
- Internal code restructuring of prompts and provider logic for clarity and maintainability without affecting user workflows.
- Refined message handling and content merging logic to ensure consistent prompt processing.
- Adjusted image attachment rendering logic for improved display consistency.
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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 the ability to retrieve detailed information for a specific Copilot session by its ID, including model metadata and optional models, via the user interface and API.
- Session data now includes additional fields such as the model used and a list of optional models.
- Enhanced GraphQL queries and UI components to support fetching and displaying these new session details.
- **Improvements**
- Session lists now provide richer information, including model details, for each session.
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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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Fix issue [BS-2522](https://linear.app/affine-design/issue/BS-2522).
### Why make this change?
If the user data contains illegal content, carrying the user data in the system prompt will run the risk of having the account banned.
### What Changed?
- Move the `Context Documents` to the user prompt.
- Add `withPrompt` in `QueryChatHistoriesInput` options.
- Get chat histories without prompt messages.
- Omit document context when saving messages to the `aiSessionMessage` db.
