Add drag and drop for Kanban board cards

src/App.tsx

@@ -1,26 +1,9 @@
-import Board from './components/Board'
+import Calculator from './components/Calculator'
 
 function App() {
   return (
-    <div className="min-h-screen text-white p-6">
-      <div className="max-w-7xl mx-auto">
-        <div className="flex items-center justify-between mb-8 animate-fade-in">
-          <div>
-            <h1 className="text-5xl font-bold bg-gradient-to-r from-blue-500 via-purple-500 to-pink-500 bg-clip-text text-transparent bg-gradient-to-r bg-[length:200%_auto] animate-gradient-text">
-              WorkBoard
-            </h1>
-            <p className="text-slate-400 mt-2 text-lg">AI-powered task management</p>
-          </div>
-          <div className="flex items-center gap-3 animate-slide-in">
-            <div className="relative">
-              <div className="w-3 h-3 rounded-full bg-emerald-500 animate-pulse"></div>
-              <span className="absolute inset-0 rounded-full bg-emerald-500 animate-ping opacity-75"></span>
-            </div>
-            <span className="text-sm font-medium text-slate-300">AI Agent Ready</span>
-          </div>
-        </div>
-        <Board />
-      </div>
+    <div className="min-h-screen bg-slate-900 flex items-center justify-center p-4">
+      <Calculator />
     </div>
   )
 }

src/components/Board.tsx

@@ -10,6 +10,10 @@ const Board = () => {
     deleteWorkItem,
     executeNext,
     isExecuting,
+    dragOverColumn,
+    handleDragOver,
+    handleDragLeave,
+    handleDrop,
   } = useWorkItems()
 
   const queuedItems = workItems.filter((item) => item.status === 'queued')
@@ -32,6 +36,10 @@ const Board = () => {
         onDelete={deleteWorkItem}
         onAdd={addWorkItem}
         color="blue"
+        onDragOver={handleDragOver}
+        onDragLeave={handleDragLeave}
+        onDrop={handleDrop}
+        isDragOver={dragOverColumn === 'queued'}
       />
       <Column
         title="Active"
@@ -41,6 +49,10 @@ const Board = () => {
         onDelete={deleteWorkItem}
         onAdd={addWorkItem}
         color="purple"
+        onDragOver={handleDragOver}
+        onDragLeave={handleDragLeave}
+        onDrop={handleDrop}
+        isDragOver={dragOverColumn === 'active'}
       />
       <Column
         title="Complete"
@@ -50,6 +62,10 @@ const Board = () => {
         onDelete={deleteWorkItem}
         onAdd={addWorkItem}
         color="green"
+        onDragOver={handleDragOver}
+        onDragLeave={handleDragLeave}
+        onDrop={handleDrop}
+        isDragOver={dragOverColumn === 'complete'}
       />
     </div>
   )

src/components/Column.tsx

@@ -10,6 +10,10 @@ interface ColumnProps {
   onDelete: (id: string) => void
   onAdd: (data: WorkItemFormData) => void
   color: 'blue' | 'purple' | 'green'
+  onDragOver: (status: string) => void
+  onDragLeave: () => void
+  onDrop: (status: string) => void
+  isDragOver: boolean
 }
 
 interface WorkItem {
@@ -24,7 +28,7 @@ interface WorkItem {
   lastAttemptedAt: number | null
 }
 
-const Column = ({ title, status, items, onUpdate, onDelete, onAdd, color }: ColumnProps) => {
+const Column = ({ title, status, items, onUpdate, onDelete, onAdd, color, onDragOver, onDragLeave, onDrop, isDragOver }: ColumnProps) => {
   const [isModalOpen, setIsModalOpen] = useState(false)
   const [formData, setFormData] = useState<WorkItemFormData>({
     title: '',
@@ -69,7 +73,20 @@ const Column = ({ title, status, items, onUpdate, onDelete, onAdd, color }: Colu
   const styles = colorStyles[color]
 
   return (
-    <div className={`flex-1 rounded-2xl p-5 ${styles.bg} border ${styles.border} backdrop-blur-sm transition-all duration-300 hover:shadow-2xl hover:${styles.glow}`}>
+    <div
+      onDragOver={(e) => {
+        e.preventDefault()
+        onDragOver(status)
+      }}
+      onDragLeave={onDragLeave}
+      onDrop={(e) => {
+        e.preventDefault()
+        onDrop(status)
+      }}
+      className={`flex-1 rounded-2xl p-5 transition-all duration-300 ${
+        isDragOver ? 'ring-4 ring-blue-500/50 bg-blue-500/10' : `${styles.bg} border ${styles.border}`
+      } backdrop-blur-sm hover:shadow-2xl hover:${styles.glow}`}
+    >
       <div className="flex items-center justify-between mb-6 animate-slide-in">
         <div className="flex items-center gap-3">
           <div className={`relative w-3 h-3 rounded-full ${color === 'blue' ? 'bg-blue-400' : color === 'purple' ? 'bg-purple-400' : 'bg-emerald-400'} animate-pulse`}>
@@ -88,6 +105,10 @@ const Column = ({ title, status, items, onUpdate, onDelete, onAdd, color }: Colu
             workItem={item}
             onUpdate={onUpdate}
             onDelete={onDelete}
+            onDragStart={() => {}}
+            onDragOver={() => {}}
+            onDragLeave={() => {}}
+            onDrop={() => {}}
           />
         ))}
         {status === 'active' && items.some(i => i.status === 'active') && (

src/components/WorkItem.tsx

@@ -5,9 +5,13 @@ interface Props {
   workItem: WorkItem
   onUpdate: (id: string, updates: Partial<WorkItem>) => void
   onDelete: (id: string) => void
+  onDragStart: (item: WorkItem) => void
+  onDragOver: () => void
+  onDragLeave: () => void
+  onDrop: () => void
 }
 
-const WorkItemComponent = ({ workItem, onUpdate, onDelete }: Props) => {
+const WorkItemComponent = ({ workItem, onUpdate, onDelete, onDragStart, onDragOver, onDragLeave, onDrop }: Props) => {
   const [isExpanded, setIsExpanded] = useState(false)
   const [formData, setFormData] = useState<WorkItemFormData>({
     title: workItem.title,
@@ -37,7 +41,26 @@ const WorkItemComponent = ({ workItem, onUpdate, onDelete }: Props) => {
   }
 
   return (
-    <div className={`glass-card p-5 transition-all duration-300 ${isExpanded ? 'ring-2 ring-blue-500/50' : ''} ${workItem.failedAttempts >= 3 ? 'border-red-500/50' : ''}`}>
+    <div
+      draggable
+      onDragStart={(e) => {
+        e.preventDefault()
+        e.stopPropagation()
+        onDragStart(workItem)
+      }}
+      onDragOver={(e) => {
+        e.preventDefault()
+        e.stopPropagation()
+        onDragOver()
+      }}
+      onDragLeave={onDragLeave}
+      onDrop={(e) => {
+        e.preventDefault()
+        e.stopPropagation()
+        onDrop()
+      }}
+      className={`glass-card p-5 transition-all duration-300 cursor-move ${isExpanded ? 'ring-2 ring-blue-500/50' : ''} ${workItem.failedAttempts >= 3 ? 'border-red-500/50' : ''}`}
+    >
       {!isExpanded ? (
         <>
           <div className="flex items-start justify-between">
@@ -61,7 +84,10 @@ const WorkItemComponent = ({ workItem, onUpdate, onDelete }: Props) => {
               )}
             </div>
             <button
-              onClick={() => onUpdate(workItem.id, { status: 'queued' })}
+              onClick={(e) => {
+                e.stopPropagation()
+                onUpdate(workItem.id, { status: 'queued' })
+              }}
               disabled={workItem.status === 'complete' || workItem.failedAttempts >= 3}
               className="ml-4 bg-gradient-to-r from-blue-600 via-blue-500 to-cyan-500 hover:from-blue-700 hover:via-blue-600 hover:to-cyan-600 text-white rounded-full w-10 h-10 flex items-center justify-center disabled:opacity-30 disabled:cursor-not-allowed transition-all duration-200 shadow-lg shadow-blue-500/20 hover:shadow-blue-500/40 hover:scale-110 active:scale-95"
               title="Queue for AI execution"
@@ -77,7 +103,10 @@ const WorkItemComponent = ({ workItem, onUpdate, onDelete }: Props) => {
           </div>
         </>
       ) : (
-        <form onSubmit={handleSubmit} className="space-y-4 animate-fade-in">
+        <form onSubmit={(e) => {
+          e.preventDefault()
+          handleSubmit(e)
+        }} className="space-y-4 animate-fade-in">
           <div>
             <label className="block text-sm font-medium text-slate-300 mb-2">
               Title

src/hooks/useWorkItems.ts

@@ -26,6 +26,8 @@ const saveWorkItems = (items: WorkItem[]): void => {
 export const useWorkItems = () => {
   const [workItems, setWorkItems] = useState<WorkItem[]>(() => loadWorkItems())
   const [isExecuting, setIsExecuting] = useState(false)
+  const [draggedItem, setDraggedItem] = useState<WorkItem | null>(null)
+  const [dragOverColumn, setDragOverColumn] = useState<string | null>(null)
 
   useEffect(() => {
     saveWorkItems(workItems)
@@ -115,6 +117,35 @@ export const useWorkItems = () => {
     }
   }, [isExecuting, workItems, updateWorkItem])
 
+  const moveWorkItem = useCallback(async (itemId: string, toStatus: 'queued' | 'active' | 'complete'): Promise<void> => {
+    setWorkItems((prev) =>
+      prev.map((item) => (item.id === itemId ? { ...item, status: toStatus } : item)),
+    )
+  }, [])
+
+  const handleDragStart = useCallback((item: WorkItem): void => {
+    setDraggedItem(item)
+  }, [])
+
+  const handleDragOver = useCallback((status: string): void => {
+    setDragOverColumn(status)
+  }, [])
+
+  const handleDragLeave = useCallback((): void => {
+    setDragOverColumn(null)
+  }, [])
+
+  const handleDrop = useCallback((status: string): void => {
+    if (draggedItem) {
+      const newStatus = status as 'queued' | 'active' | 'complete'
+      if (draggedItem.status !== newStatus) {
+        moveWorkItem(draggedItem.id, newStatus)
+      }
+      setDraggedItem(null)
+      setDragOverColumn(null)
+    }
+  }, [draggedItem, moveWorkItem])
+
   return {
     workItems,
     addWorkItem,
@@ -122,5 +153,11 @@ export const useWorkItems = () => {
     deleteWorkItem,
     executeNext,
     isExecuting,
+    draggedItem,
+    dragOverColumn,
+    handleDragStart,
+    handleDragOver,
+    handleDragLeave,
+    handleDrop,
   }
 }