feat(calls): native WebRTC mesh (drop PeerJS); faster transcode; deploy docs

chore(deploy): make ffmpeg resilient on Hugging Face

feat(player): transcode MKV/AVI/HEVC/AC3 to browser-friendly MP4 on the fly

fix: self-host PeerJS, repair subtitles/dedup, mobile responsiveness

Initial commit: WatchTorrent - synchronized torrent streaming app