Cody: Button to return to current chat session from history

[abeatrix]

Close sourcegraph/cody#339

Added a new button on top that would go back to the current chat view:

Test plan

Passing the history e2e test

[sourcegraph-bot]

📖 Storybook live preview

[toolmantim]

Thank you @abeatrix!!

Unfortunately I don't think this quick approach will fix it after all… because we're going to get these situations (notice the same apparent history item switching between two chats):

Screen.Recording.2023-06-02.at.10.28.05.pm.mov

Is there a reason the current chat isn't added to the UserHistory list immediately when it is created? It seems like it's only added after an additional new chat is created.

If we can make sure the new chat immediately is added to the history, I think that would solve it, and bring it more in to line with our web implementation (and similar to other message interfaces ala iMessage, ChatGPT, WhatsApp, etc):

Screen.Recording.2023-06-02.at.10.21.14.pm.mov

[abeatrix]

Is there a reason the current chat isn't added to the UserHistory list immediately when it is created?

I'm not sure since I didn't implement this new design but I think it used to show up immediately in the old design. I can take a deeper look after Non-Stop Cody!

[toolmantim]

(also spotted #52848 in the process of testing)

[abeatrix]

picked up by @deepak2431 in #52904