v1.2.0

Added

• A local HTTP API (127.0.0.1 only, token-authenticated, off by default)
  for starting/stopping output and reading status from a script or a Stream
  Deck, without going through the menu bar.
• In-app update checking against GitHub Releases, with Check for
  Updates…/Check for Updates Automatically and an install flow that
  never interrupts a running or recovering session.
• An About panel showing the app version and links to the repository and
  issue tracker; a --version command-line flag.

Changed

• The app version is now derived from the release tag automatically instead
  of being hand-maintained in Info.plist.

Fixed

• A status indicator that previously conveyed error/normal state by color
  alone now also shows an icon.