I’m afraid neither your approach nor mine are right
I’ve been the last person to post in the thread Saisie SOTA update V13.4, so according to your theory, my avatar should have the blue frame but it doesn’t.
My theory was that my avatar gets the blue frame when someone has responded to me on a thread. but you have responded to me on this thread and my avatar doesn’t show the blue frame.
We’ll have to keep observing and figure out…