- Resolve hand card index from the container at event time instead of
capturing it when handlers are bound, preventing the "wrong card on
second drag" bug after a reorder.
- Enable drag-to-arrange in both draw and discard phases; clicking a card
during draw now shows guidance rather than discarding.
- Add discard-pile click target so a selected card can be discarded by
clicking the pile, and extract shared `_setupPileClick` helper to reduce
duplication.
- Add `tools/regressionPipePuzzleUnhover.cjs`, a Playwright regression
test verifying that Phaser's `killTweensOf(target, 'prop')` no longer
clobbers in-flight rotation tweens on pointerout/pointerover.
