v4.3.1.0

feat: add account and cloud device management across clients
feat: add session recording, thumbnails, and playback
feat: add WebClient remote file manager and safer file operations
feat: add queued and cancellable file transfers
feat: unify Android and WebClient mobile remote controls
feat: add fullscreen mode and remote quality controls
feat: add Alt/Command key mapping
feat: enable HTTPS/WSS across clients and signaling server
fix: improve remote input, paste, and transfer lifecycle handling
fix: improve host startup, account binding, and connection reliability