KeelrLeek
6dcc62a2fd
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.