- Replaced direct stream access in the `regenerateMessage` and `_sendMessageInternal` methods with a new helper function `_conversationDeltaStream` for better encapsulation and reusability.
- Improved the management of chat and channel event streams by utilizing the new helper function, enhancing code clarity and maintainability.
- Removed the previous `conversationDeltaEventsProvider` as it is no longer necessary with the new implementation, simplifying the provider structure.
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