Daneel a1701b60ea fix(macos): enable pixel-scroll-precision-mode for smooth trackpad/mouse scrolling ...

macOS NS/Cocoa Emacs generates pixel-level scroll events from trackpad
and Magic Mouse. Without pixel-scroll-precision-mode, these events are
handled as line-based scrolling, resulting in jerky or broken scroll
behavior.

Changes:
- Enable pixel-scroll-precision-mode (Emacs 29+) in GUI mode
- Set pixel-scroll-precision-large-scroll-height to 40.0 (prevents
  trackpad fling from being interpolated frame-by-frame)
- Enable momentum scrolling (trackpad inertia from macOS)
- Keep line-based mouse-wheel-scroll-amount as fallback for physical
  scroll wheels

2026-02-23 14:11:16 +01:00

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