A LAN-only receiver — a BluOS player, another QBZ — was invisible until an
official app paired it into the session; that is the "it showed up once,
for a day" report. The Qt LAN runtime now browses _qobuz-connect._tcp
alongside its own receiver (same lifetime: Qobuz Connect enabled and
ready), probes every announcement that is not us, and the picker shows the
answers under "On this network" with a Pair action. Pairing mints the
delegated pair with /qws/delegateAuth for the renderer's app id and hands
it over with this controller's session uuid and become_active, exactly as
the official controllers do; the cloud then lists the device and its LAN
row drops out by uuid. scripts/qconnect-lan-fake-renderer.sh is a receiver
that never joins the cloud, for exercising this without a Node. Pending:
qbzd parity, the 5-minute retry backoff, become_active=false.
cc
