tuiScrollSensitivity property
Mouse-report TUI wheel sensitivity (1..10). Alternate-scroll still uses scrollMultiplier / scrollSensitivity.
Applies to discrete/mouse-notch classification (large pixel deltas /
legacy wheel). Trackpad-like small pixel streams stay 1:1 and ignore this
knob (Orca parity). Flutter has no wheelDeltaY, so the controller treats
abs(dy) >= 50 as a discrete notch for this purpose.
Implementation
final int tuiScrollSensitivity;