- Updated chat API to accept an array of content parts (text and images) in addition to plain text.
- Modified content validation to ensure at least one part is provided.
- Enhanced message processing to handle image data and convert it to a suitable format for the chat engine.
- Added utility functions for extracting text from parts and normalizing content input.
- Updated model response to include the type of model used.
- Improved error handling in the chat engine stream response.
