Refactor drag and drop for mobile

Replaced drag and drop functionality with a click-to-select and click-to-drop interaction for mobile friendliness. When a box in the container is clicked, columns become highlighted and clickable. Clicking a column drops the box there, and the columns return to their default state. Existing features like double-clicking and desktop drag-and-drop remain.

src/components/BulgarianSolitaire.tsx

@@ -24,6 +24,7 @@ const BulgarianSolitaire: React.FC<BulgarianSolitaireProps> = ({ showSocialShare
   const [highlightedBoxes, setHighlightedBoxes] = useState<Set<number>>(new Set());
   const [isAnimating, setIsAnimating] = useState(false);
   const [lastUsedColumn, setLastUsedColumn] = useState<number | null>(null);
+  const [selectedBoxForMove, setSelectedBoxForMove] = useState<number | null>(null);
 
   const totalBoxes = (n * (n + 1)) / 2;
 
@@ -98,6 +99,33 @@ const BulgarianSolitaire: React.FC<BulgarianSolitaireProps> = ({ showSocialShare
     setDraggedBox(null);
   };
 
+  const handleBoxClick = (boxId: number) => {
+    const box = boxes.find(b => b.id === boxId);
+    if (!box || box.columnIndex !== null || isPlaying) return;
+    
+    // Select box for moving
+    setSelectedBoxForMove(boxId);
+  };
+
+  const handleColumnClick = (e: React.MouseEvent, columnIndex: number) => {
+    e.stopPropagation();
+    if (selectedBoxForMove === null || isPlaying) return;
+
+    // Move selected box to this column
+    setColumns(prev => prev.map((col, idx) => 
+      idx === columnIndex ? [...col, selectedBoxForMove] : col
+    ));
+    
+    // Update box location
+    setBoxes(prev => prev.map(b => 
+      b.id === selectedBoxForMove ? { ...b, columnIndex } : b
+    ));
+
+    // Track last used column and clear selection
+    setLastUsedColumn(columnIndex);
+    setSelectedBoxForMove(null);
+  };
+
   const handleDoubleClick = (boxId: number) => {
     const box = boxes.find(b => b.id === boxId);
     if (!box) return;
@@ -258,8 +286,14 @@ const BulgarianSolitaire: React.FC<BulgarianSolitaireProps> = ({ showSocialShare
 
   const containerBoxes = boxes.filter(box => box.columnIndex === null);
 
+  const handleBackgroundClick = () => {
+    if (selectedBoxForMove !== null) {
+      setSelectedBoxForMove(null);
+    }
+  };
+
   return (
-    <div className="max-w-6xl mx-auto p-6 space-y-8">
+    <div className="max-w-6xl mx-auto p-6 space-y-8" onClick={handleBackgroundClick}>
       <div className="text-center space-y-4">
         <h1 className="text-4xl font-bold text-foreground">Bulgarian Solitaire</h1>
         <p className="text-muted-foreground text-lg max-w-3xl mx-auto">
@@ -302,7 +336,10 @@ const BulgarianSolitaire: React.FC<BulgarianSolitaireProps> = ({ showSocialShare
                 draggable={!isPlaying}
                 onDragStart={(e) => handleDragStart(e, box.id)}
                 onDoubleClick={() => handleDoubleClick(box.id)}
-                className="w-8 h-8 bg-primary rounded cursor-move hover:bg-primary/80 transition-colors"
+                onClick={() => handleBoxClick(box.id)}
+                className={`w-8 h-8 bg-primary rounded cursor-pointer hover:bg-primary/80 transition-colors ${
+                  selectedBoxForMove === box.id ? 'ring-2 ring-blue-500 ring-offset-2' : ''
+                }`}
               >
               </div>
             ))}
@@ -325,7 +362,10 @@ const BulgarianSolitaire: React.FC<BulgarianSolitaireProps> = ({ showSocialShare
               key={index}
               onDragOver={handleDragOver}
               onDrop={(e) => handleDrop(e, index)}
-              className="border border-muted-foreground rounded-lg min-h-[100px] w-12 p-1 bg-background/50 flex flex-col-reverse gap-1 transition-all duration-500"
+              onClick={(e) => handleColumnClick(e, index)}
+              className={`border rounded-lg min-h-[100px] w-12 p-1 bg-background/50 flex flex-col-reverse gap-1 transition-all duration-500 ${
+                selectedBoxForMove !== null ? 'border-blue-500 border-2 cursor-pointer hover:bg-blue-50' : 'border-muted-foreground'
+              }`}
               style={{ flexBasis: `calc(${100/15}% - 0.25rem)`, minWidth: '48px' }}
             >
               <div className="text-xs text-center text-muted-foreground mb-1 transform rotate-0">