v0.2.68

• Scrolling with a trackpad works again. xterm's scrollSensitivity defaulted
  to 1, and a macOS trackpad reports deltas of only a few pixels per event:
  at 1 nearly every event moved less than one cell and was swallowed by the
  fractional accumulator before anything reached the screen. A gentle flick
  scrolled a couple of lines at most, or nothing at all.
• Agent CLIs were hit hardest. Claude Code, codex, pi, opencode and droid all
  run in the alternate screen with mouse tracking on, so the wheel arrives as
  an SGR button 4/5 report that the same function gates: a dropped event is a
  scroll the app never sees. Gemini stays on the main screen and keeps using
  xterm's own scrollback, so it was never affected.
• 3 is the multiplier VS Code ships for its own xterm panes.