aterm 0.72.0

aterm is the terminal for AI. New here? What each file is:

• aterm-0.72.0.dmg — the signed, notarized app as a drag-install DMG (~28 MB). The ALab toolchain installs itself on first launch (or on demand via aterm pkg install --default-set).
• aterm-0.72.0-mac.zip — the same app as a zip (~26 MB); this is the container the in-app updater and Homebrew stage from.
• aterm.dmg / aterm-mac.zip — permanent releases/latest/download/ names for the DMG and the zip above (byte-identical copies).
• .sha256 files verify a download: shasum -a 256 -c <asset>.sha256.
• aterm-appcast.toml / aterm-machines.toml (and their .sig) are consumed by the in-app self-updater — not for humans.
• Releases named atpkg-index-N are machine-readable package indexes, not app releases.

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Changed

• The cursor's jump streak is a meteor now, not a banner. When the cursor
  leaps across the screen it leaves a rainbow streak; that streak used to hold
  most of its brightness for most of its life and could sit on the glass for
  over a second, which read as a lingering smear rather than speed. The light is
  now spent early, next to the flight that earned it, and what remains is a thin
  decaying tail. It is mostly gone in 0.42s instead of 0.97s. Fast at the front,
  graceful at the back.

Fixed

• The streak can no longer wash out to grey. Fading now moves only opacity,
  never colour, and a new gate walks the streak across 144 frames and refuses any
  lit pixel that has lost its hue — with a deliberately greyed control proving
  the gate can actually fail.