Show time stamp of last interaction / message on mouse-over in side panel

What variant of Codex are you using?

App

What feature would you like to see?

<img width="668" height="104" alt="Image" src="https://github.com/user-attachments/assets/18794355-9ce5-4f4c-9de0-63076450bc31" />

Currently the side panel (helpfully!) shows the total duration for a given session under a project. However the last interaction / message / could have been just minutes ago - I've got several sessions going on in the left panel and it's very difficult to figure out which one finished recently and is waiting for input (the blue dot is nice but it goes away if you click on it and then switch to another session).

Mouse-over right now only shows an 'archive' button but it would be nice if the footer toolbar area or somehow or a tooltip shows the last time-stamp so it's easy to differentiate between two sessions where one ended successfully hours ago but one ended minutes ago and is waiting for me to get back to it.

Additional information

In the above example there was no blue dot (or I don't remember seeing one - even if there was, the work hasn't finished), I switched to it an hour ago and asked a question, then wanted to follow up but forgot because the '11h' was misleading; felt like the work ended 11 hours ago.

Only when I clicked on the session is when I realized it was an hour ago, waiting for me to respond.

<img width="576" height="110" alt="Image" src="https://github.com/user-attachments/assets/8b605014-cbc4-4243-ad24-da4804e02c4b" />