The "Author Avatars" toggle only reached the iPad/macOS comments page.
The expanded comments overlay now takes the same flag (hosts pass it in
the next commit), and the expanded comments pill shows the comments icon
instead of the author avatar when avatars are off.
The replies block in a comment used a hardcoded 44pt leading inset for
the avatar column regardless of the toggle, so "Show replies" was
indented past the comment text when avatars were hidden. The toggle now
aligns with the text (44pt with avatars, 0 without) and nested replies
keep a smaller 16pt inset without avatars so the hierarchy still reads.
0b2cb4deeb