Mark items as dragging before updating inventory state to prevent
the spawner from destroying containers mid-drag. Move inventory
removal to drop time for lost items, and add guards to ignore
stale pointer events on inactive containers.
Replace manual ItemRenderer with InventoryItemSpawner and
GridBackgroundRenderer. Uses spawnEffect to automatically sync item
visuals with game state changes. Separates static grid rendering and
tracks dragged items to prevent spawner conflicts.
Replace manual pointer event handling with the framework's
dragDropEventEffect utility. Update DragController to manage
DisposableBag for cleanup and pass containers instead of
pointers to drag callbacks. Add framework path alias to
tsconfig and fix loop variable shadowing in LostItemManager.
Move magic numbers and style constants to src/config.ts.
Decompose InventoryWidget into DragController, ItemRenderer,
and LostItemManager for better separation of concerns. Add
createButton utility and remove unused CombatUnitWidget.
Update scenes to import from centralized config.
hypercross