[Game] Fix dragged card always placed on bottom of stack (#7228)

cockatrice/src/game_graphics/zones/stack_zone.cpp

@@ -58,17 +58,12 @@ void StackZone::handleDropEvent(const QList<CardDragItem *> &dragItems,
     }
 
     const auto &cards = getLogic()->getCards();
-    int index;
+    int index = calcDropIndexFromY(dropPoint.y(), MIN_CARD_VISIBLE);
     if (startZone == getLogic()) {
-        // Reordering within the zone: use drop position
-        index = calcDropIndexFromY(dropPoint.y(), MIN_CARD_VISIBLE);
         // Same-zone no-op: don't move a card onto itself
         if (!cards.isEmpty() && cards.at(index)->getId() == dragItems.at(0)->getId()) {
             return;
         }
-    } else {
-        // Coming from another zone: append at end (top of stack, rendered on top)
-        index = static_cast<int>(cards.size());
     }
 
     Command_MoveCard cmd;