The daemon's is_link_local_v6 guard could not see scoped fe80::…%iface
hosts, so a later link-local mDNS resolution could clobber a good
routable IPv4 host and break the session until the next re-resolution.
Strip the %zone before parsing. Also invalidate a StartCast when the
session dies (or StopCast fires) between negotiation and StartFinished,
so the dead session is torn down instead of installed and the UI is not
left stuck on Casting; add daemon actor tests for both races.
Hardening: dedupe Cast/DLNA re-resolution forwards, tolerate a
TRANSITIONING DLNA renderer after Play, fall back to if-addrs for LAN-IP
enumeration when ip(8) is missing, harden the HTTP token fallback, and
null-guard the estimated-bandwidth FFI getter.
Builds out the full v1 scope: a vendored+patched openscreen subset for
low-latency Cast Streaming (Mirroring receiver 0F5096E8) alongside the
existing Cast V2/HLS and new DLNA/AVTransport casting paths, breadcastd's
Idle/Casting state machine with a private IPC socket, the breadcast GTK4
popup as a thin IPC client, and bread.cast.*/bread.command.cast.* breadd
integration (device discovery, start/stop, mirroring lifecycle events).
Also adds bakery/systemd/Forgejo CI packaging.
Validated end-to-end against a real Chromecast/Google TV: negotiated
Cast Streaming session, live pipeline playback, and daemon+GUI click-to-cast/
stop through the actual popup.
