Mixed history attachment flow

source order: poem.txt > reference-1.png
one attachment group: true
file icon dimensions: 28 × 28
file icon color: rgb(207, 211, 214)
file icon uses a solid fill: true
file and image share one row: true
both cards are 64px high: true
the image is a 64px tile: true
the file card is wider than the image: true
the group wraps when needed: true
the group is right-aligned: true