Work Plan - Touch Resize Implementation

Request

The user reported that resizing handles were not working on touchscreen devices.

DraftView.tsx:
- Replaced handleMouseDown, onMouseMove, onMouseUp with unified handleResizeStart, onResizeMove, onResizeEnd.
- Added logic to detect touches in event object and extract clientX/clientY from the first touch point.
- Attached onTouchStart to sidebar and pool resize handles.
- Added passive: false to touch event listeners (via useEffect logic or direct attach) to call e.preventDefault(), preventing page scrolling while dragging. Note: Implemented in the handler function with if (e.cancelable) e.preventDefault().
- Added touch-none utility class to resize handles to structurally prevent browser touch actions.
DeckBuilderView.tsx:
- Implemented the exact same unified handler logic as DraftView.
- Updated both Sidebar (vertical) and Pool (horizontal) resize handles with onTouchStart.

Touch: Dragging handles on a touchscreen (mobile/tablet) should now resize the panels smoothly.
Mouse: Mouse interaction remains unchanged and performant (using requestAnimationFrame).