- one linear timeline: the pill fades out, the empty shape grows, then the
card fades in on the settled shape (and backwards on close)
- fades use a surface-coloured veil instead of .opacity(), and the shape
has no clip, so neither costs a gpu layer
- measured on the desktop: open went from 11 frames over 20 ms to 1,
close from 4 to 0
- the spectrum capture runs whenever the shown player plays, and the pill
shows it as 7 mirrored, glowing bars (about 9% of one core while playing)
server2