Alright, I have implemented your request. I like it myself that way, even though in the dark mode it’s not that visible that much due contrast.
Let me know your thoughts. In the light version it’s more noticeable.
Note: I went with the logic, that the topic owner does not have a material themed box, to highlight him within a conversation and make his topics like a “fundament”, if you know what I mean.
Let me know what you think about that as well please.

