Streaming output is broken after refreshing chat app

[wylswz]

Self Checks

• I have read the Contributing Guide and Language Policy.
• I have searched for existing issues search for existing issues, including closed ones.
• I confirm that I am using English to submit this report, otherwise it will be closed.
• Please do not modify this template :) and fill in all the required fields.

1. Is this request related to a challenge you're experiencing? Tell me about your story.

To reproduce

1. Start a conversation in chat bot
2. Prompt the LLM to output long sequence
3. Refresh the page and enter previous conversation

A possible solution

In message list API, add a workflow_run_id field to each message. The frontend tries to subscribe to last workflow run in the conversation.

In broadcast_channel, expose a boolean field called replay in subscribe APIs. If replay == True, the id used in xread should be 0 instead of $.

Consider using group in order to consume from the beginning.

2. Additional context or comments

No response

3. Can you help us with this feature?

• I am interested in contributing to this feature.