With the meta collapsed to a single visible From row + chevron,
there is room to put the action cluster on that same row as a
right-aligned sibling. Dropped the absolute positioning and
gradient-fade overlap — actions now flex-end via margin-left:auto
so From sits on the left and Reply / Reply-all / Forward / AI /
Summary / More all sit on the right of the same row.
Also moved the chevron inside the recipient-chips span so it sits
adjacent to the sender chip instead of wrapping onto a second line.
4bf389ed09