Tune joystick feel and isolate keypad from tab swipes

[saeedvaziry]

Summary

• Joystick now fires a light haptic per arrow, has a wider dead zone, and a slower repeat rate so a single drag no longer fires a burst of arrows.
• Touching anywhere on the keypad row disables PagerView swiping, so horizontal joystick/key drags no longer flip between workspace tabs.

Test plan

• Drag the joystick left/right inside a terminal tab — arrows fire, tab does not change
• Drag horizontally on the esc/tab/modifier strip — tab does not change
• Swipe on the terminal body or tab strip — pager still changes tabs
• Each arrow tick produces a subtle haptic