Work Plan - Deck Builder & Draft UI Enhancements

Request

Deck Builder Stack DnD: Enable card drag and drop for the stacked view in Deck Builder.
Custom Sort Dropdown: Use a custom graphic dropdown list instead of browser default for sorting.
Resizable Layouts: Make library/preview resizeable in Deck Builder, and selected pool/preview resizeable in Draft UI.

StackView.tsx: Added renderWrapper prop to allow parent components to wrap card items (e.g. with DraggableCardWrapper).
DeckBuilderView.tsx:
- Implemented sortDropdownOpen state and custom UI for the "Sort" dropdown.
- Added resizing state (sidebarWidth, poolHeightPercent) and mouse event handlers.
- Applied dynamic styles to Sidebar and Pool/Deck zones.
- Passed DraggableCardWrapper to StackView via the new renderWrapper prop.
DraftView.tsx:
- Added resizing state (sidebarWidth, poolHeight) and mouse event handlers.
- Applied dynamic styles to Sidebar and Pool Droppable area.
- Fixed syntax error introduced during refactoring.

Deck Builder:
- Verify cards in Stack View can be dragged.
- Verify "Sort" dropdown is custom styled.
- Verify Sidebar width can be adjusted.
- Verify Pool/Library split can be adjusted (in horizontal mode especially).
Draft UI:
- Verify Sidebar width can be adjusted.
- Verify Selected Pool height can be adjusted.