Player::pause_acked() returns a generation-bound PauseAck applied on the
audio thread; a desired-paused latch makes an in-flight decoder come up
paused instead of auto-starting, closing the window where a pause lands
during decode setup. Proven live by examples/focus_ack_probe.rs:
ack-while-playing freezes position; ack-while-buffering never becomes
audible; resume clears the latch; plain pause() during buffering is
demonstrated to auto-start (pre-existing hazard, filed separately).
Transport ADR recorded (native), Phase 0 marked complete in the plan.
The previous .git directory was found gutted (only info/ remained), so
history is unrecoverable locally. This commit restores version control
with the tree exactly as it stands: the working app, the preview-tracks
launcher on the artist hero, the scrollable-track-previews design bundle
(docs + approved mockups), and the Phase 0 validation artifacts.
KeelrLeek