1→import { useEffect, useState, useMemo } from 'react'
     2→import { useSearchParams } from 'react-router-dom'
     3→import { Plus, X, GripVertical, Clock, User, RefreshCw, Flag, Pencil, Check, Trash2, Filter, ArrowUpDown, LayoutGrid, List, ChevronLeft, ChevronRight } from 'lucide-react'
     4→import * as Dialog from '@radix-ui/react-dialog'
     5→import * as AlertDialog from '@radix-ui/react-alert-dialog'
     6→import { useProjectStore } from '../stores/projectStore'
     7→import { useTaskStore, Task, TaskCreate, TaskUpdate } from '../stores/taskStore'
     8→
     9→const ITEMS_PER_PAGE = 10
    10→
    11→const COLUMNS = [
    12→  { id: 'backlog', title: 'Backlog', color: 'border-slate-500' },
    13→  { id: 'in_progress', title: 'In Progress', color: 'border-accent' },
    14→  { id: 'qa', title: 'QA', color: 'border-primary-400' },
    15→  { id: 'done', title: 'Done', color: 'border-green-400' },
    16→  { id: 'blocked', title: 'Blocked', color: 'border-destructive' },
    17→]
    18→
    19→const PRIORITY_LABELS: Record<number, string> = {
    20→  0: 'Low',
    21→  1: 'Medium',
    22→  2: 'High',
    23→  3: 'Critical',
    24→}
    25→
    26→const STATUS_LABELS: Record<string, string> = {
    27→  backlog: 'Backlog',
    28→  in_progress: 'In Progress',
    29→  qa: 'QA',
    30→  done: 'Done',
    31→  blocked: 'Blocked',
    32→}
    33→
    34→export default function KanbanBoard() {
    35→  const [searchParams, setSearchParams] = useSearchParams()
    36→  const { currentProject } = useProjectStore()
    37→  const { tasks, fetchTasks, createTask, updateTask, updateTaskStatus, deleteTask, isTaskDeleting, isLoading } = useTaskStore()
    38→  const [showAddDialog, setShowAddDialog] = useState(false)
    39→  const [newTaskName, setNewTaskName] = useState('')
    40→  const [newTaskDescription, setNewTaskDescription] = useState('')
    41→  const [newTaskPriority, setNewTaskPriority] = useState(0)
    42→  const [isCreating, setIsCreating] = useState(false)
    43→  const [draggedTask, setDraggedTask] = useState<number | null>(null)
    44→  const [selectedTask, setSelectedTask] = useState<Task | null>(null)
    45→  const [isEditing, setIsEditing] = useState(false)
    46→  const [editName, setEditName] = useState('')
    47→  const [editDescription, setEditDescription] = useState('')
    48→  const [editPriority, setEditPriority] = useState(0)
    49→  const [isSaving, setIsSaving] = useState(false)
    50→  const [showDeleteDialog, setShowDeleteDialog] = useState(false)
    51→  const [isDeleting, setIsDeleting] = useState(false)
    52→  const [showUnsavedDialog, setShowUnsavedDialog] = useState(false)
    53→  const [pendingCloseAction, setPendingCloseAction] = useState<'close' | 'cancel' | null>(null)
    54→  // Filter and Sort state - initialize from URL params
    55→  const getInitialPriorityFilter = (): number | 'all' => {
    56→    const param = searchParams.get('priority')
    57→    if (param === 'all' || param === null) return 'all'
    58→    const num = parseInt(param, 10)
    59→    return [0, 1, 2, 3].includes(num) ? num : 'all'
    60→  }
    61→  const getInitialSortOrder = (): 'newest' | 'oldest' | 'priority' => {
    62→    const param = searchParams.get('sort')
    63→    if (param === 'newest' || param === 'oldest' || param === 'priority') return param
    64→    return 'newest'
    65→  }
    66→  const getInitialViewMode = (): 'kanban' | 'list' => {
    67→    const param = searchParams.get('view')
    68→    if (param === 'list') return 'list'
    69→    return 'kanban'
    70→  }
    71→
    72→  const [priorityFilter, setPriorityFilter] = useState<number | 'all'>(getInitialPriorityFilter)
    73→  const [sortOrder, setSortOrder] = useState<'newest' | 'oldest' | 'priority'>(getInitialSortOrder)
    74→  // View mode and pagination state
    75→  const [viewMode, setViewMode] = useState<'kanban' | 'list'>(getInitialViewMode)
    76→  const [currentPage, setCurrentPage] = useState(1)
    77→
    78→  useEffect(() => {
    79→    if (currentProject?.id) {
    80→      fetchTasks(currentProject.id)
    81→    }
    82→  }, [currentProject?.id, fetchTasks])
    83→
    84→  // Handle deep linking - select task from URL param after tasks are loaded
    85→  useEffect(() => {
    86→    const taskIdParam = searchParams.get('task')
    87→    if (taskIdParam && tasks.length > 0) {
    88→      const taskId = parseInt(taskIdParam, 10)
    89→      const task = tasks.find(t => t.id === taskId)
    90→      if (task) {
    91→        setSelectedTask(task)
    92→      }
    93→    }
    94→  }, [searchParams, tasks])
    95→
    96→  // Update URL when task is selected
    97→  const handleSelectTask = (task: Task) => {
    98→    setSelectedTask(task)
    99→    const newParams = new URLSearchParams(searchParams)
   100→    newParams.set('task', task.id.toString())
   101→    setSearchParams(newParams)
   102→  }
   103→
   104→  // Clear task from URL when panel is closed
   105→  const clearTaskFromUrl = () => {
   106→    const newParams = new URLSearchParams(searchParams)
   107→    newParams.delete('task')
   108→    setSearchParams(newParams)
   109→  }
   110→
   111→  // Update URL when filter changes
   112→  const handlePriorityFilterChange = (value: number | 'all') => {
   113→    setPriorityFilter(value)
   114→    const newParams = new URLSearchParams(searchParams)
   115→    if (value === 'all') {
   116→      newParams.delete('priority')
   117→    } else {
   118→      newParams.set('priority', value.toString())
   119→    }
   120→    setSearchParams(newParams)
   121→  }
   122→
   123→  // Update URL when sort changes
   124→  const handleSortOrderChange = (value: 'newest' | 'oldest' | 'priority') => {
   125→    setSortOrder(value)
   126→    const newParams = new URLSearchParams(searchParams)
   127→    if (value === 'newest') {
   128→      newParams.delete('sort') // default value, no need to store
   129→    } else {
   130→      newParams.set('sort', value)
   131→    }
   132→    setSearchParams(newParams)
   133→  }
   134→
   135→  // Update URL when view mode changes
   136→  const handleViewModeChange = (value: 'kanban' | 'list') => {
   137→    setViewMode(value)
   138→    const newParams = new URLSearchParams(searchParams)
   139→    if (value === 'kanban') {
   140→      newParams.delete('view') // default value, no need to store
   141→    } else {
   142→      newParams.set('view', value)
   143→    }
   144→    setSearchParams(newParams)
   145→  }
   146→
   147→  // Filtered and sorted tasks
   148→  const filteredAndSortedTasks = useMemo(() => {
   149→    let result = [...tasks]
   150→
   151→    // Apply priority filter
   152→    if (priorityFilter !== 'all') {
   153→      result = result.filter(task => task.priority === priorityFilter)
   154→    }
   155→
   156→    // Apply sort
   157→    result.sort((a, b) => {
   158→      if (sortOrder === 'newest') {
   159→        return new Date(b.created_at).getTime() - new Date(a.created_at).getTime()
   160→      } else if (sortOrder === 'oldest') {
   161→        return new Date(a.created_at).getTime() - new Date(b.created_at).getTime()
   162→      } else {
   163→        // priority - highest first
   164→        return b.priority - a.priority
   165→      }
   166→    })
   167→
   168→    return result
   169→  }, [tasks, priorityFilter, sortOrder])
   170→
   171→  // Pagination calculations
   172→  const totalPages = Math.ceil(filteredAndSortedTasks.length / ITEMS_PER_PAGE)
   173→  const paginatedTasks = useMemo(() => {
   174→    const startIndex = (currentPage - 1) * ITEMS_PER_PAGE
   175→    return filteredAndSortedTasks.slice(startIndex, startIndex + ITEMS_PER_PAGE)
   176→  }, [filteredAndSortedTasks, currentPage])
   177→
   178→  // Reset page when filter changes
   179→  useEffect(() => {
   180→    setCurrentPage(1)
   181→  }, [priorityFilter, sortOrder])
   182→
   183→  const getTasksByStatus = (status: string) => {
   184→    return filteredAndSortedTasks.filter((task) => task.status === status)
   185→  }
   186→
   187→  const handleCreateTask = async () => {
   188→    if (!currentProject || !newTaskName.trim()) return
   189→    setIsCreating(true)
   190→    try {
   191→      const taskData: TaskCreate = {
   192→        name: newTaskName.trim(),
   193→        description: newTaskDescription.trim() || undefined,
   194→        priority: newTaskPriority,
   195→      }
   196→      await createTask(currentProject.id, taskData)
   197→      setNewTaskName('')
   198→      setNewTaskDescription('')
   199→      setNewTaskPriority(0)
   200→      setShowAddDialog(false)
   201→    } catch (error) {
   202→      console.error('Failed to create task:', error)
   203→    } finally {
   204→      setIsCreating(false)
   205→    }
   206→  }
   207→
   208→  const handleDragStart = (taskId: number) => {
   209→    setDraggedTask(taskId)
   210→  }
   211→
   212→  const handleDragOver = (e: React.DragEvent) => {
   213→    e.preventDefault()
   214→  }
   215→
   216→  const handleDrop = async (targetStatus: string) => {
   217→    if (draggedTask === null) return
   218→    try {
   219→      await updateTaskStatus(draggedTask, targetStatus)
   220→    } catch (error) {
   221→      console.error('Failed to update task status:', error)
   222→    }
   223→    setDraggedTask(null)
   224→  }
   225→
   226→  const handleStartEdit = () => {
   227→    if (!selectedTask) return
   228→    setEditName(selectedTask.name)
   229→    setEditDescription(selectedTask.description || '')
   230→    setEditPriority(selectedTask.priority)
   231→    setIsEditing(true)
   232→  }
   233→
   234→  // Check if edit form has unsaved changes
   235→  const hasUnsavedChanges = () => {
   236→    if (!selectedTask || !isEditing) return false
   237→    return (
   238→      editName.trim() !== selectedTask.name ||
   239→      (editDescription.trim() || '') !== (selectedTask.description || '') ||
   240→      editPriority !== selectedTask.priority
   241→    )
   242→  }
   243→
   244→  const handleCancelEdit = () => {
   245→    if (hasUnsavedChanges()) {
   246→      setPendingCloseAction('cancel')
   247→      setShowUnsavedDialog(true)
   248→    } else {
   249→      setIsEditing(false)
   250→    }
   251→  }
   252→
   253→  const handleClosePanel = () => {
   254→    if (hasUnsavedChanges()) {
   255→      setPendingCloseAction('close')
   256→      setShowUnsavedDialog(true)
   257→    } else {
   258→      setSelectedTask(null)
   259→      setIsEditing(false)
   260→      clearTaskFromUrl()
   261→    }
   262→  }
   263→
   264→  const handleDiscardChanges = () => {
   265→    setShowUnsavedDialog(false)
   266→    if (pendingCloseAction === 'close') {
   267→      setSelectedTask(null)
   268→      clearTaskFromUrl()
   269→    }
   270→    setIsEditing(false)
   271→    setPendingCloseAction(null)
   272→  }
   273→
   274→  const handleKeepEditing = () => {
   275→    setShowUnsavedDialog(false)
   276→    setPendingCloseAction(null)
   277→  }
   278→
   279→  const handleSaveEdit = async () => {
   280→    if (!selectedTask) return
   281→    setIsSaving(true)
   282→    try {
   283→      const updates: TaskUpdate = {
   284→        name: editName.trim(),
   285→        description: editDescription.trim() || undefined,
   286→        priority: editPriority,
   287→      }
   288→      const updatedTask = await updateTask(selectedTask.id, updates)
   289→      setSelectedTask(updatedTask)
   290→      setIsEditing(false)
   291→    } catch (error) {
   292→      console.error('Failed to update task:', error)
   293→    } finally {
   294→      setIsSaving(false)
   295→    }
   296→  }
   297→
   298→  const handleDeleteTask = async () => {
   299→    if (!selectedTask) return
   300→    // Check if already being deleted (prevents rapid clicks)
   301→    if (isTaskDeleting(selectedTask.id)) return
   302→
   303→    const taskIdToDelete = selectedTask.id
   304→    setIsDeleting(true)
   305→    // Close dialog immediately to prevent additional clicks
   306→    setShowDeleteDialog(false)
   307→
   308→    try {
   309→      await deleteTask(taskIdToDelete)
   310→      setSelectedTask(null)
   311→      clearTaskFromUrl()
   312→    } catch (error) {
   313→      console.error('Failed to delete task:', error)
   314→      // Re-open dialog if delete failed so user can retry
   315→      setShowDeleteDialog(true)
   316→    } finally {
   317→      setIsDeleting(false)
   318→    }
   319→  }
   320→
   321→  if (!currentProject) {
   322→    return (
   323→      <div className="flex items-center justify-center h-full">
   324→        <p className="text-slate-500">Select a project to view its Kanban board</p>
   325→      </div>
   326→    )
   327→  }
   328→
   329→  return (
   330→    <div className="h-full flex flex-col">
   331→      {/* Header */}
   332→      <div className="flex items-center justify-between mb-6">
   333→        <h1 className="text-2xl font-bold">Kanban Board</h1>
   334→        <div className="flex items-center gap-4">
   335→          {/* Priority Filter */}
   336→          <div className="flex items-center gap-2">
   337→            <Filter size={16} className="text-slate-400" />
   338→            <select
   339→              value={priorityFilter === 'all' ? 'all' : priorityFilter.toString()}
   340→              onChange={(e) => handlePriorityFilterChange(e.target.value === 'all' ? 'all' : Number(e.target.value))}
   341→              className="px-3 py-1.5 bg-slate-800 border border-slate-700 rounded-lg text-sm text-white focus:outline-none focus:ring-2 focus:ring-accent"
   342→            >
   343→              <option value="all">All Priorities</option>
   344→              <option value="3">Critical</option>
   345→              <option value="2">High</option>
   346→              <option value="1">Medium</option>
   347→              <option value="0">Low</option>
   348→            </select>
   349→          </div>
   350→
   351→          {/* Sort Order */}
   352→          <div className="flex items-center gap-2">
   353→            <ArrowUpDown size={16} className="text-slate-400" />
   354→            <select
   355→              value={sortOrder}
   356→              onChange={(e) => handleSortOrderChange(e.target.value as 'newest' | 'oldest' | 'priority')}
   357→              className="px-3 py-1.5 bg-slate-800 border border-slate-700 rounded-lg text-sm text-white focus:outline-none focus:ring-2 focus:ring-accent"
   358→            >
   359→              <option value="newest">Newest First</option>
   360→              <option value="oldest">Oldest First</option>
   361→              <option value="priority">By Priority</option>
   362→            </select>
   363→          </div>
   364→
   365→          {/* View Mode Toggle */}
   366→          <div className="flex items-center gap-1 bg-slate-800 border border-slate-700 rounded-lg p-1">
   367→            <button
   368→              onClick={() => handleViewModeChange('kanban')}
   369→              className={`p-1.5 rounded ${viewMode === 'kanban' ? 'bg-accent text-white' : 'text-slate-400 hover:text-white'}`}
   370→              title="Kanban View"
   371→            >
   372→              <LayoutGrid size={18} />
   373→            </button>
   374→            <button
   375→              onClick={() => handleViewModeChange('list')}
   376→              className={`p-1.5 rounded ${viewMode === 'list' ? 'bg-accent text-white' : 'text-slate-400 hover:text-white'}`}
   377→              title="List View"
   378→            >
   379→              <List size={18} />
   380→            </button>
   381→          </div>
   382→
   383→        <Dialog.Root open={showAddDialog} onOpenChange={setShowAddDialog}>
   384→          <Dialog.Trigger asChild>
   385→            <button className="btn-accent flex items-center gap-2">
   386→              <Plus size={18} />
   387→              Add Task
   388→            </button>
   389→          </Dialog.Trigger>
   390→          <Dialog.Portal>
   391→            <Dialog.Overlay className="fixed inset-0 bg-black/50 z-50" />
   392→            <Dialog.Content className="fixed top-1/2 left-1/2 -translate-x-1/2 -translate-y-1/2 bg-slate-800 border border-slate-700 rounded-lg p-6 w-full max-w-md z-50 shadow-xl">
   393→              <div className="flex items-center justify-between mb-4">
   394→                <Dialog.Title className="text-xl font-semibold text-white">
   395→                  Add New Task
   396→                </Dialog.Title>
   397→                <Dialog.Close asChild>
   398→                  <button className="text-slate-400 hover:text-white">
   399→                    <X size={20} />
   400→                  </button>
   401→                </Dialog.Close>
   402→              </div>
   403→              <Dialog.Description className="text-slate-400 mb-4">
   404→                Create a new task for this project.
   405→              </Dialog.Description>
   406→              <div className="space-y-4">
   407→                <div>
   408→                  <label className="block text-sm font-medium text-slate-300 mb-1">
   409→                    Task Name *
   410→                  </label>
   411→                  <input
   412→                    type="text"
   413→                    value={newTaskName}
   414→                    onChange={(e) => setNewTaskName(e.target.value)}
   415→                    className="w-full px-3 py-2 bg-slate-900 border border-slate-700 rounded-lg text-white placeholder-slate-500 focus:outline-none focus:ring-2 focus:ring-accent focus:border-transparent"
   416→                    placeholder="Enter task name"
   417→                  />
   418→                </div>
   419→                <div>
   420→                  <label className="block text-sm font-medium text-slate-300 mb-1">
   421→                    Description
   422→                  </label>
   423→                  <textarea
   424→                    value={newTaskDescription}
   425→                    onChange={(e) => setNewTaskDescription(e.target.value)}
   426→                    rows={3}
   427→                    className="w-full px-3 py-2 bg-slate-900 border border-slate-700 rounded-lg text-white placeholder-slate-500 focus:outline-none focus:ring-2 focus:ring-accent focus:border-transparent resize-none"
   428→                    placeholder="Enter task description"
   429→                  />
   430→                </div>
   431→                <div>
   432→                  <label className="block text-sm font-medium text-slate-300 mb-1">
   433→                    Priority
   434→                  </label>
   435→                  <select
   436→                    value={newTaskPriority}
   437→                    onChange={(e) => setNewTaskPriority(Number(e.target.value))}
   438→                    className="w-full px-3 py-2 bg-slate-900 border border-slate-700 rounded-lg text-white focus:outline-none focus:ring-2 focus:ring-accent focus:border-transparent"
   439→                  >
   440→                    <option value={0}>Low</option>
   441→                    <option value={1}>Medium</option>
   442→                    <option value={2}>High</option>
   443→                    <option value={3}>Critical</option>
   444→                  </select>
   445→                </div>
   446→              </div>
   447→              <div className="mt-6 flex justify-end gap-3">
   448→                <Dialog.Close asChild>
   449→                  <button className="px-4 py-2 text-sm text-slate-300 hover:bg-slate-700 rounded-lg transition-colors">
   450→                    Cancel
   451→                  </button>
   452→                </Dialog.Close>
   453→                <button
   454→                  onClick={handleCreateTask}
   455→                  disabled={isCreating || !newTaskName.trim()}
   456→                  className="px-4 py-2 text-sm bg-accent hover:bg-accent/80 text-white rounded-lg transition-colors disabled:opacity-50"
   457→                >
   458→                  {isCreating ? 'Creating...' : 'Create Task'}
   459→                </button>
   460→              </div>
   461→            </Dialog.Content>
   462→          </Dialog.Portal>
   463→        </Dialog.Root>
   464→        </div>
   465→      </div>
   466→
   467→      {/* Main Content Area */}
   468→      <div className="flex-1 flex gap-4 overflow-hidden">
   469→        {viewMode === 'list' ? (
   470→          /* List View with Pagination */
   471→          <div className="flex-1 flex flex-col">
   472→            {/* Task List Table */}
   473→            <div className="flex-1 overflow-auto bg-slate-800 rounded-lg border border-slate-700">
   474→              <table className="w-full">
   475→                <thead className="bg-slate-900 sticky top-0">
   476→                  <tr className="text-left text-sm text-slate-400">
   477→                    <th className="px-4 py-3 font-medium">Task Name</th>
   478→                    <th className="px-4 py-3 font-medium">Status</th>
   479→                    <th className="px-4 py-3 font-medium">Priority</th>
   480→                    <th className="px-4 py-3 font-medium">Created</th>
   481→                  </tr>
   482→                </thead>
   483→                <tbody>
   484→                  {isLoading && tasks.length === 0 ? (
   485→                    <tr>
   486→                      <td colSpan={4} className="px-4 py-8 text-center text-slate-500">
   487→                        Loading...
   488→                      </td>
   489→                    </tr>
   490→                  ) : paginatedTasks.length === 0 ? (
   491→                    <tr>
   492→                      <td colSpan={4} className="px-4 py-8 text-center text-slate-500">
   493→                        No tasks found
   494→                      </td>
   495→                    </tr>
   496→                  ) : (
   497→                    paginatedTasks.map((task) => (
   498→                      <tr
   499→                        key={task.id}
   500→                        onClick={() => handleSelectTask(task)}
   501→                        className={`border-t border-slate-700 hover:bg-slate-700/50 cursor-pointer ${
   502→                          selectedTask?.id === task.id ? 'bg-slate-700' : ''
   503→                        }`}
   504→                      >
   505→                        <td className="px-4 py-3">
   506→                          <div className="font-medium">{task.name}</div>
   507→                          {task.description && (
   508→                            <div className="text-sm text-slate-400 truncate max-w-md">
   509→                              {task.description}
   510→                            </div>
   511→                          )}
   512→                        </td>
   513→                        <td className="px-4 py-3">
   514→                          <span className={`badge ${
   515→                            task.status === 'backlog' ? 'badge-backlog' :
   516→                            task.status === 'in_progress' ? 'badge-in-progress' :
   517→                            task.status === 'qa' ? 'badge-qa' :
   518→                            task.status === 'done' ? 'badge-done' :
   519→                            'badge-blocked'
   520→                          }`}>
   521→                            {STATUS_LABELS[task.status] || task.status}
   522→                          </span>
   523→                        </td>
   524→                        <td className="px-4 py-3">
   525→                          <span className={`text-sm ${
   526→                            task.priority === 3 ? 'text-destructive' :
   527→                            task.priority === 2 ? 'text-warning' :
   528→                            task.priority === 1 ? 'text-accent' :
   529→                            'text-slate-400'
   530→                          }`}>
   531→                            {PRIORITY_LABELS[task.priority] || 'Unknown'}
   532→                          </span>
   533→                        </td>
   534→                        <td className="px-4 py-3 text-sm text-slate-400">
   535→                          {new Date(task.created_at).toLocaleDateString()}
   536→                        </td>
   537→                      </tr>
   538→                    ))
   539→                  )}
   540→                </tbody>
   541→              </table>
   542→            </div>
   543→
   544→            {/* Pagination Controls */}
   545→            {totalPages > 1 && (
   546→              <div className="flex items-center justify-between mt-4 px-2">
   547→                <div className="text-sm text-slate-400">
   548→                  Showing {((currentPage - 1) * ITEMS_PER_PAGE) + 1} to {Math.min(currentPage * ITEMS_PER_PAGE, filteredAndSortedTasks.length)} of {filteredAndSortedTasks.length} tasks
   549→                </div>
   550→                <div className="flex items-center gap-2">
   551→                  <button
   552→                    onClick={() => setCurrentPage(p => Math.max(1, p - 1))}
   553→                    disabled={currentPage === 1}
   554→                    className="p-2 rounded-lg bg-slate-800 border border-slate-700 text-slate-400 hover:text-white hover:bg-slate-700 disabled:opacity-50 disabled:cursor-not-allowed"
   555→                  >
   556→                    <ChevronLeft size={18} />
   557→                  </button>
   558→                  <div className="flex items-center gap-1">
   559→                    {Array.from({ length: totalPages }, (_, i) => i + 1).map((page) => (
   560→                      <button
   561→                        key={page}
   562→                        onClick={() => setCurrentPage(page)}
   563→                        className={`w-8 h-8 rounded-lg text-sm ${
   564→                          page === currentPage
   565→                            ? 'bg-accent text-white'
   566→                            : 'bg-slate-800 border border-slate-700 text-slate-400 hover:text-white hover:bg-slate-700'
   567→                        }`}
   568→                      >
   569→                        {page}
   570→                      </button>
   571→                    ))}
   572→                  </div>
   573→                  <button
   574→                    onClick={() => setCurrentPage(p => Math.min(totalPages, p + 1))}
   575→                    disabled={currentPage === totalPages}
   576→                    className="p-2 rounded-lg bg-slate-800 border border-slate-700 text-slate-400 hover:text-white hover:bg-slate-700 disabled:opacity-50 disabled:cursor-not-allowed"
   577→                  >
   578→                    <ChevronRight size={18} />
   579→                  </button>
   580→                </div>
   581→              </div>
   582→            )}
   583→          </div>
   584→        ) : (
   585→        /* Kanban Columns */
   586→        <div className={`flex-1 flex gap-4 overflow-x-auto pb-4 ${selectedTask ? 'mr-0' : ''}`}>
   587→          {COLUMNS.map((column) => (
   588→          <div
   589→            key={column.id}
   590→            className={`flex-shrink-0 w-72 bg-slate-800 rounded-lg border-t-2 ${column.color}`}
   591→            onDragOver={handleDragOver}
   592→            onDrop={() => handleDrop(column.id)}
   593→          >
   594→            {/* Column Header */}
   595→            <div className="p-4 border-b border-slate-700">
   596→              <div className="flex items-center justify-between">
   597→                <h2 className="font-semibold">{column.title}</h2>
   598→                <span className="text-sm text-slate-400 bg-slate-700 px-2 py-0.5 rounded">
   599→                  {getTasksByStatus(column.id).length}
   600→                </span>
   601→              </div>
   602→            </div>
   603→
   604→            {/* Column Content */}
   605→            <div className="p-3 space-y-3 max-h-[calc(100vh-300px)] overflow-y-auto">
   606→              {isLoading && tasks.length === 0 ? (
   607→                <div className="text-center py-8 text-slate-500 text-sm">
   608→                  Loading...
   609→                </div>
   610→              ) : getTasksByStatus(column.id).length === 0 ? (
   611→                <div className="text-center py-8 text-slate-500 text-sm">
   612→                  No tasks
   613→                </div>
   614→              ) : (
   615→                getTasksByStatus(column.id).map((task) => (
   616→                  <div
   617→                    key={task.id}
   618→                    draggable
   619→                    onDragStart={() => handleDragStart(task.id)}
   620→                    onClick={() => handleSelectTask(task)}
   621→                    className={`kanban-card bg-slate-900 rounded-lg p-4 border border-slate-700 cursor-pointer hover:border-slate-600 ${
   622→                      draggedTask === task.id ? 'opacity-50' : ''
   623→                    } ${selectedTask?.id === task.id ? 'ring-2 ring-accent' : ''}`}
   624→                  >
   625→                    <div className="flex items-start gap-2">
   626→                      <GripVertical size={16} className="text-slate-600 mt-0.5 flex-shrink-0" />
   627→                      <div className="flex-1 min-w-0">
   628→                        <h3 className="font-medium mb-1">{task.name}</h3>
   629→                        {task.description && (
   630→                          <p className="text-sm text-slate-400 line-clamp-2 mb-2">
   631→                            {task.description}
   632→                          </p>
   633→                        )}
   634→                        <div className="flex items-center justify-between">
   635→                          <span
   636→                            className={`badge ${
   637→                              column.id === 'backlog'
   638→                                ? 'badge-backlog'
   639→                                : column.id === 'in_progress'
   640→                                ? 'badge-in-progress'
   641→                                : column.id === 'qa'
   642→                                ? 'badge-qa'
   643→                                : column.id === 'done'
   644→                                ? 'badge-done'
   645→                                : 'badge-blocked'
   646→                            }`}
   647→                          >
   648→                            {column.title}
   649→                          </span>
   650→                          <span className={`text-xs ${
   651→                            task.priority === 3 ? 'text-destructive' :
   652→                            task.priority === 2 ? 'text-warning' :
   653→                            task.priority === 1 ? 'text-accent' :
   654→                            'text-slate-500'
   655→                          }`}>
   656→                            {task.priority === 3 ? 'Critical' :
   657→                             task.priority === 2 ? 'High' :
   658→                             task.priority === 1 ? 'Medium' : 'Low'}
   659→                          </span>
   660→                        </div>
   661→                      </div>
   662→                    </div>
   663→                  </div>
   664→                ))
   665→              )}
   666→            </div>
   667→          </div>
   668→          ))}
   669→        </div>
   670→        )}
   671→
   672→        {/* Task Details Panel */}
   673→        {selectedTask && (
   674→          <div className="w-96 flex-shrink-0 bg-slate-800 rounded-lg border border-slate-700 overflow-hidden">
   675→            <div className="p-4 border-b border-slate-700 flex items-center justify-between">
   676→              <h2 className="font-semibold text-lg">Task Details</h2>
   677→              <div className="flex items-center gap-2">
   678→                {!isEditing && (
   679→                  <>
   680→                    <button
   681→                      onClick={handleStartEdit}
   682→                      className="text-slate-400 hover:text-accent transition-colors"
   683→                      title="Edit Task"
   684→                    >
   685→                      <Pencil size={18} />
   686→                    </button>
   687→                    <AlertDialog.Root open={showDeleteDialog} onOpenChange={setShowDeleteDialog}>
   688→                      <AlertDialog.Trigger asChild>
   689→                        <button
   690→                          className="text-slate-400 hover:text-destructive transition-colors disabled:opacity-50 disabled:cursor-not-allowed"
   691→                          title="Delete Task"
   692→                          disabled={isDeleting || (selectedTask ? isTaskDeleting(selectedTask.id) : false)}
   693→                        >
   694→                          <Trash2 size={18} />
   695→                        </button>
   696→                      </AlertDialog.Trigger>
   697→                      <AlertDialog.Portal>
   698→                        <AlertDialog.Overlay className="fixed inset-0 bg-black/50 z-50" />
   699→                        <AlertDialog.Content className="fixed top-1/2 left-1/2 -translate-x-1/2 -translate-y-1/2 bg-slate-800 border border-slate-700 rounded-lg p-6 w-full max-w-md z-50 shadow-xl">
   700→                          <AlertDialog.Title className="text-xl font-semibold text-white">
   701→                            Delete Task
   702→                          </AlertDialog.Title>
   703→                          <AlertDialog.Description className="mt-3 text-slate-400">
   704→                            Are you sure you want to delete <span className="font-semibold text-white">{selectedTask.name}</span>?
   705→                            This action cannot be undone.
   706→                          </AlertDialog.Description>
   707→                          <div className="mt-6 flex justify-end gap-3">
   708→                            <AlertDialog.Cancel asChild>
   709→                              <button className="px-4 py-2 text-sm text-slate-300 hover:bg-slate-700 rounded-lg transition-colors">
   710→                                Cancel
   711→                              </button>
   712→                            </AlertDialog.Cancel>
   713→                            <AlertDialog.Action asChild>
   714→                              <button
   715→                                onClick={handleDeleteTask}
   716→                                disabled={isDeleting || (selectedTask ? isTaskDeleting(selectedTask.id) : false)}
   717→                                className="px-4 py-2 text-sm bg-destructive hover:bg-destructive/80 text-white rounded-lg transition-colors disabled:opacity-50"
   718→                              >
   719→                                {isDeleting || (selectedTask && isTaskDeleting(selectedTask.id)) ? 'Deleting...' : 'Delete Task'}
   720→                              </button>
   721→                            </AlertDialog.Action>
   722→                          </div>
   723→                        </AlertDialog.Content>
   724→                      </AlertDialog.Portal>
   725→                    </AlertDialog.Root>
   726→                  </>
   727→                )}
   728→                <button
   729→                  onClick={handleClosePanel}
   730→                  className="text-slate-400 hover:text-white transition-colors"
   731→                  title="Close"
   732→                >
   733→                  <X size={20} />
   734→                </button>
   735→              </div>
   736→            </div>
   737→            <div className="p-4 space-y-4 overflow-y-auto max-h-[calc(100vh-300px)]">
   738→              {isEditing ? (
   739→                /* Edit Form */
   740→                <div className="space-y-4">
   741→                  <div>
   742→                    <label className="block text-sm text-slate-400 mb-1">Name *</label>
   743→                    <input
   744→                      type="text"
   745→                      value={editName}
   746→                      onChange={(e) => setEditName(e.target.value)}
   747→                      className="w-full px-3 py-2 bg-slate-900 border border-slate-700 rounded-lg text-white placeholder-slate-500 focus:outline-none focus:ring-2 focus:ring-accent focus:border-transparent"
   748→                      placeholder="Task name"
   749→                    />
   750→                  </div>
   751→                  <div>
   752→                    <label className="block text-sm text-slate-400 mb-1">Description</label>
   753→                    <textarea
   754→                      value={editDescription}
   755→                      onChange={(e) => setEditDescription(e.target.value)}
   756→                      rows={3}
   757→                      className="w-full px-3 py-2 bg-slate-900 border border-slate-700 rounded-lg text-white placeholder-slate-500 focus:outline-none focus:ring-2 focus:ring-accent focus:border-transparent resize-none"
   758→                      placeholder="Task description"
   759→                    />
   760→                  </div>
   761→                  <div>
   762→                    <label className="block text-sm text-slate-400 mb-1">Priority</label>
   763→                    <select
   764→                      value={editPriority}
   765→                      onChange={(e) => setEditPriority(Number(e.target.value))}
   766→                      className="w-full px-3 py-2 bg-slate-900 border border-slate-700 rounded-lg text-white focus:outline-none focus:ring-2 focus:ring-accent focus:border-transparent"
   767→                    >
   768→                      <option value={0}>Low</option>
   769→                      <option value={1}>Medium</option>
   770→                      <option value={2}>High</option>
   771→                      <option value={3}>Critical</option>
   772→                    </select>
   773→                  </div>
   774→                  <div className="flex gap-2 pt-2">
   775→                    <button
   776→                      onClick={handleCancelEdit}
   777→                      className="flex-1 px-3 py-2 text-sm text-slate-300 hover:bg-slate-700 rounded-lg transition-colors"
   778→                    >
   779→                      Cancel
   780→                    </button>
   781→                    <button
   782→                      onClick={handleSaveEdit}
   783→                      disabled={isSaving || !editName.trim()}
   784→                      className="flex-1 flex items-center justify-center gap-2 px-3 py-2 text-sm bg-accent hover:bg-accent/80 text-white rounded-lg transition-colors disabled:opacity-50"
   785→                    >
   786→                      {isSaving ? 'Saving...' : <><Check size={16} /> Save</>}
   787→                    </button>
   788→                  </div>
   789→                </div>
   790→              ) : (
   791→                /* View Mode */
   792→                <>
   793→                  {/* Task Name */}
   794→                  <div>
   795→                    <label className="block text-sm text-slate-400 mb-1">Name</label>
   796→                    <p className="font-medium text-lg">{selectedTask.name}</p>
   797→                  </div>
   798→
   799→                  {/* Description */}
   800→                  <div>
   801→                    <label className="block text-sm text-slate-400 mb-1">Description</label>
   802→                    <p className="text-slate-300">
   803→                      {selectedTask.description || <span className="italic text-slate-500">No description</span>}
   804→                    </p>
   805→                  </div>
   806→
   807→                  {/* Status */}
   808→                  <div>
   809→                    <label className="block text-sm text-slate-400 mb-1">Status</label>
   810→                    <span className={`badge ${
   811→                      selectedTask.status === 'backlog' ? 'badge-backlog' :
   812→                      selectedTask.status === 'in_progress' ? 'badge-in-progress' :
   813→                      selectedTask.status === 'qa' ? 'badge-qa' :
   814→                      selectedTask.status === 'done' ? 'badge-done' :
   815→                      'badge-blocked'
   816→                    }`}>
   817→                      {STATUS_LABELS[selectedTask.status] || selectedTask.status}
   818→                    </span>
   819→                  </div>
   820→
   821→                  {/* Priority */}
   822→                  <div>
   823→                    <label className="block text-sm text-slate-400 mb-1">Priority</label>
   824→                    <span className={`font-medium ${
   825→                      selectedTask.priority === 3 ? 'text-destructive' :
   826→                      selectedTask.priority === 2 ? 'text-warning' :
   827→                      selectedTask.priority === 1 ? 'text-accent' :
   828→                      'text-slate-400'
   829→                    }`}>
   830→                      {PRIORITY_LABELS[selectedTask.priority] || 'Unknown'}
   831→                    </span>
   832→                  </div>
   833→
   834→                  {/* Agent Assignment */}
   835→                  <div>
   836→                    <label className="block text-sm text-slate-400 mb-1 flex items-center gap-1">
   837→                      <User size={14} />
   838→                      Agent Assignment
   839→                    </label>
   840→                    <p className="text-slate-300">
   841→                      {selectedTask.agent_type ? (
   842→                        <span className="capitalize">{selectedTask.agent_type.replace('_', ' ')}</span>
   843→                      ) : (
   844→                        <span className="italic text-slate-500">Not assigned</span>
   845→                      )}
   846→                    </p>
   847→                  </div>
   848→
   849→                  {/* Iteration Count */}
   850→                  <div>
   851→                    <label className="block text-sm text-slate-400 mb-1 flex items-center gap-1">
   852→                      <RefreshCw size={14} />
   853→                      Iteration Count
   854→                    </label>
   855→                    <p className="text-slate-300">{selectedTask.iteration_count}</p>
   856→                  </div>
   857→
   858→                  {/* Flagged for Review */}
   859→                  <div>
   860→                    <label className="block text-sm text-slate-400 mb-1 flex items-center gap-1">
   861→                      <Flag size={14} />
   862→                      Flagged for Review
   863→                    </label>
   864→                    <p className={selectedTask.flagged_for_review ? 'text-warning' : 'text-slate-300'}>
   865→                      {selectedTask.flagged_for_review ? 'Yes' : 'No'}
   866→                    </p>
   867→                  </div>
   868→
   869→                  {/* Time Estimates */}
   870→                  {(selectedTask.estimated_time || selectedTask.actual_time) && (
   871→                    <div>
   872→                      <label className="block text-sm text-slate-400 mb-1 flex items-center gap-1">
   873→                        <Clock size={14} />
   874→                        Time
   875→                      </label>
   876→                      <div className="text-slate-300 text-sm">
   877→                        {selectedTask.estimated_time && <p>Estimated: {selectedTask.estimated_time} min</p>}
   878→                        {selectedTask.actual_time && <p>Actual: {selectedTask.actual_time} min</p>}
   879→                      </div>
   880→                    </div>
   881→                  )}
   882→
   883→                  {/* Created/Updated timestamps */}
   884→                  <div className="pt-4 border-t border-slate-700 text-xs text-slate-500">
   885→                    <p>Created: {new Date(selectedTask.created_at).toLocaleString()}</p>
   886→                    <p>Updated: {new Date(selectedTask.updated_at).toLocaleString()}</p>
   887→                  </div>
   888→                </>
   889→              )}
   890→            </div>
   891→          </div>
   892→        )}
   893→
   894→        {/* Unsaved Changes Warning Dialog */}
   895→        <AlertDialog.Root open={showUnsavedDialog} onOpenChange={setShowUnsavedDialog}>
   896→          <AlertDialog.Portal>
   897→            <AlertDialog.Overlay className="fixed inset-0 bg-black/50 z-50" />
   898→            <AlertDialog.Content className="fixed top-1/2 left-1/2 -translate-x-1/2 -translate-y-1/2 bg-slate-800 border border-slate-700 rounded-lg p-6 w-full max-w-md z-50 shadow-xl">
   899→              <AlertDialog.Title className="text-xl font-semibold text-white">
   900→                Unsaved Changes
   901→              </AlertDialog.Title>
   902→              <AlertDialog.Description className="mt-3 text-slate-400">
   903→                You have unsaved changes. Are you sure you want to discard them?
   904→              </AlertDialog.Description>
   905→              <div className="mt-6 flex justify-end gap-3">
   906→                <AlertDialog.Cancel asChild>
   907→                  <button
   908→                    onClick={handleKeepEditing}
   909→                    className="px-4 py-2 text-sm text-slate-300 hover:bg-slate-700 rounded-lg transition-colors"
   910→                  >
   911→                    Keep Editing
   912→                  </button>
   913→                </AlertDialog.Cancel>
   914→                <AlertDialog.Action asChild>
   915→                  <button
   916→                    onClick={handleDiscardChanges}
   917→                    className="px-4 py-2 text-sm bg-destructive hover:bg-destructive/80 text-white rounded-lg transition-colors"
   918→                  >
   919→                    Discard Changes
   920→                  </button>
   921→                </AlertDialog.Action>
   922→              </div>
   923→            </AlertDialog.Content>
   924→          </AlertDialog.Portal>
   925→        </AlertDialog.Root>
   926→      </div>
   927→    </div>
   928→  )
   929→}
   930→

<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>