Then, after the step loop, ten things the mock cannot do at all: a force-stop
and the paused restore that follows it (waited out past twenty-five seconds,
which is well past the ten-second FGS-kill window), the position restored,
playback resumed, the system media session and its ownership, media keys,
exactly one card in the shade and exactly one session in the system's list —
the two checks that prove the media3 migration landed rather than doubled —
ten seconds in the background with the position still advancing, SoulStream's
own mixer underruns, and the queue window that rides along with every card
update and that the lock-screen card is now built out of. One more line
prints and never fails: whether the service is foreground, whether our audio
focus is in the system's stack, and whether the becoming-noisy receiver is
registered. What none of it touches is in "What the walk proves about the
card, and what it does not", above.