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## Summary by CodeRabbit
* **New Features**
* Introduced support for document semantic search, keyword search, and
document reading tools in chat AI features.
* Added new interactive cards to display results for document keyword
search, semantic search, and reading operations within chat.
* Automatically restores and displays pinned chat sessions when
revisiting the workspace chat page.
* **Improvements**
* Enhanced the chat interface with new components for richer
document-related AI responses.
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