Dropped frames never requested a keyframe, SessionEnded skipped ordered
stop (portal/TV/FFI leak, next start could abort), and a late end could
kill the following cast. Failed starts left PlatformClientPosix alive.
DLNA leaked its HTTP server and ignored portal EOS.
Also: start no longer blocks the daemon actor, IPC accept/request loops
stay up, HLS Range is clamped, LAN IP follows the renderer subnet, and
the picker closes before the portal dialog and handles Escape.
Route dev/beta/release build steps through ci/build.sh, pinned to
bread-ecosystem@147cfbb, instead of installing toolchain/libraries
directly on the bare runner. Adds ci/deps.txt for the build-time-only
packages breadcast needs beyond the shared image's base set (jsoncpp
and libcrypto for breadcast-caststream-sys's build.rs; gstreamer and
gst-plugins-base-libs for the gstreamer-app/-video sys crates) --
deliberately excludes bakery.toml's runtime-only plugin deps
(pipewire/bad/hlssink3/va), which are loaded dynamically by name and
never linked at compile time. Also adds check.yml to run clippy/test
on feature/fix branches ahead of a release build, matching breadpad's
already-migrated pattern.
