Drops the custom WebRTC DataChannel pipeline + pion deps + WSS signaling
client + wire framing. Every in-browser playback now uses HLS over HTTP
from the daemon (Tailscale/LAN/UPnP). Browser P2P never re-enabled.
Wire renames (incompatible with web < 2026-05-26): agent.WebRTCSession
=> agent.StreamSession, SyncResponse.WebRTCSessions (JSON: webrtcSessions)
=> StreamSessions (JSON: streamSessions). MIN_AGENT_VERSION is bumped
to 0.9.4 on the web side so older agents see an upgrade card.
Also fixes the libx264 'VBV bitrate > level limit' abort by clamping
the encoder bitrate to the effective output height instead of the
requested label (carried over from the prior 0.9.3 unreleased work).
The seed_file vertical (mode=seed_file handler + engine.SeedFile) was
retired with the in-browser P2P player. [downloads.webrtc] config block
deleted; existing TOML files with the section still parse fine.
- Bump golang.org/x/{net,crypto,sys,text,term} to latest patches to
clear GHSA module advisories flagged by Docker Scout.
- Add Docker Scout CVE gate to the release workflow (fails only on
FIXABLE critical/high; unfixed upstream ffmpeg codec CVEs are accepted
and documented in SECURITY.md).
- Add weekly + manual docker-rebuild workflow so newly fixed base/
ffmpeg/Go patches land on :latest between tagged releases.
- Document container image vuln-scanning policy and hardening in
SECURITY.md.
