Previous cards in stack are draggable when partially visible

[Ayanokoji1248]

When interacting with the image card stack, the main card should be the only draggable element. However, cards behind the main one (that are slightly visible on top) can also be dragged, which causes unexpected behavior and breaks the intended user experience.

[HassanXTech]

Opened PR #2 : only the top card is draggable; others have pointer events disabled to avoid accidental drags.