RTC enabled: reloading the page doesn't reload the personas

[brichet]

Description

If RTC is enabled (jupyter-collaboration installed), when reloading the page, the personas are not reloaded in the persona control widget. The behavior is the same if Jupyterlab is opened in another browser.
Therefore there is no way to communicate to an LLM.

The screencast below displays the log console, AFAIU there no error/warning related to this issue.

output.webm

I guess an initialization message is missing in this case.

Reproduce

• install jupyter-ai with RTC pip install --pre jupyter-ai[rtc]
• start jupyterlab
• open a chat
• reload the page OR open another browser (incogito) and connect ot jupyterlab

Expected behavior

The widget to be aware of the personas

[dlqqq]

@brichet Hey, I opened this PR and managed to reproduce the issue in the persona-manager repo: jupyter-ai-contrib/jupyter-ai-persona-manager#158

I think this is happening because only WsChatModel emits events via ChatManager.on_client_connect(). This should be possible with YChat as well, just forgot to wire it.

Next steps: We should add a test to make sure chats fire 'client connected' events both with and without RTC in jupyter-chat, fix it in v0.25.1, and then bump to that in PR #158 and verify checks pass.

[brichet]

It should be fixed with the 2 following PRs:

• jupyterlab-chat: the chat manager emit an event when it receives an awareness event Publish awareness events with RTC jupyter-chat#540
• jupyter-server-documents: emit awareness event when a client join or leave a room Emit an awareness event when a client join or leave a room jupyter-ai-contrib/jupyter-server-documents#319