Add Backlog view for sprint planning

- Created BacklogView component with:
  - Search and filter (by type and priority)
  - List of unassigned backlog items
  - Quick sprint assignment dropdown
  - Sprint planning section showing all sprints
  - Drag-and-drop for reordering
  - Stats summary (total, urgent, high priority)
  - Quick add button for new backlog items
- Added Backlog view toggle alongside Kanban/Sprint
- Backlog items show type, priority, comment count

data/tasks.json

@@ -87,7 +87,7 @@
         },
         {
           "id": "c7",
-          "text": "\u2705 All 3 repos created and pushed to Gitea: gantt-board, blog-backup, heartbeat-monitor",
+          "text": "✅ All 3 repos created and pushed to Gitea: gantt-board, blog-backup, heartbeat-monitor",
           "createdAt": "2026-02-18T17:01:23.109Z",
           "author": "assistant"
         }
@@ -469,5 +469,17 @@
       ]
     }
   ],
-  "lastUpdated": 1771529100000
+  "lastUpdated": 1771544832422,
+  "sprints": [
+    {
+      "name": "Sprint 1",
+      "goal": "",
+      "startDate": "2026-02-19",
+      "endDate": "2026-02-22",
+      "status": "planning",
+      "projectId": "1",
+      "id": "1771544832363",
+      "createdAt": "2026-02-19T23:47:12.363Z"
+    }
+  ]
 }

src/app/page.tsx

@@ -9,7 +9,8 @@ import { Textarea } from "@/components/ui/textarea"
 import { Label } from "@/components/ui/label"
 import { useTaskStore, Task, TaskType, TaskStatus, Priority, Project } from "@/stores/useTaskStore"
 import { SprintBoard } from "@/components/SprintBoard"
-import { Plus, MessageSquare, Calendar, Tag, Trash2, Edit2, X, Check, MoreHorizontal, LayoutGrid, Flag } from "lucide-react"
+import { BacklogView } from "@/components/BacklogView"
+import { Plus, MessageSquare, Calendar, Tag, Trash2, Edit2, X, Check, MoreHorizontal, LayoutGrid, Flag, ListTodo } from "lucide-react"
 
 const typeColors: Record<TaskType, string> = {
   idea: "bg-purple-500",
@@ -71,7 +72,7 @@ export default function Home() {
   })
   const [newComment, setNewComment] = useState("")
   const [editingTask, setEditingTask] = useState<Task | null>(null)
-  const [viewMode, setViewMode] = useState<'kanban' | 'sprint'>('kanban')
+  const [viewMode, setViewMode] = useState<'kanban' | 'sprint' | 'backlog'>('kanban')
 
   // Sync from server on mount
   useEffect(() => {
@@ -267,6 +268,17 @@ export default function Home() {
                         <Flag className="w-4 h-4" />
                         Sprint
                       </button>
+                      <button
+                        onClick={() => setViewMode('backlog')}
+                        className={`flex items-center gap-1 px-3 py-1.5 rounded text-sm font-medium transition-colors ${
+                          viewMode === 'backlog'
+                            ? 'bg-slate-700 text-white'
+                            : 'text-slate-400 hover:text-white'
+                        }`}
+                      >
+                        <ListTodo className="w-4 h-4" />
+                        Backlog
+                      </button>
                     </div>
                     <Button onClick={() => setNewTaskOpen(true)} className="w-full sm:w-auto">
                       <Plus className="w-4 h-4 mr-2" />
@@ -278,6 +290,8 @@ export default function Home() {
                 {/* View Content */}
                 {viewMode === 'sprint' ? (
                   <SprintBoard />
+                ) : viewMode === 'backlog' ? (
+                  <BacklogView />
                 ) : (
                   <>
                     {/* Kanban Columns */}

src/components/BacklogView.tsx

@@ -0,0 +1,438 @@
+"use client"
+
+import { useState } from "react"
+import {
+  DndContext,
+  DragEndEvent,
+  DragOverlay,
+  DragStartEvent,
+  PointerSensor,
+  useSensor,
+  useSensors,
+  closestCorners,
+} from "@dnd-kit/core"
+import {
+  SortableContext,
+  verticalListSortingStrategy,
+  useSortable,
+} from "@dnd-kit/sortable"
+import { CSS } from "@dnd-kit/utilities"
+import { useTaskStore, Task, Sprint } from "@/stores/useTaskStore"
+import { Card, CardContent } from "@/components/ui/card"
+import { Badge } from "@/components/ui/badge"
+import { Button } from "@/components/ui/button"
+import { Plus, GripVertical, Search, Filter } from "lucide-react"
+
+const priorityColors: Record<string, string> = {
+  low: "bg-slate-600",
+  medium: "bg-blue-600",
+  high: "bg-orange-600",
+  urgent: "bg-red-600",
+}
+
+const typeLabels: Record<string, string> = {
+  idea: "💡 Idea",
+  task: "📋 Task",
+  bug: "🐛 Bug",
+  research: "🔬 Research",
+  plan: "📐 Plan",
+}
+
+const typeColors: Record<string, string> = {
+  idea: "bg-purple-500",
+  task: "bg-blue-500",
+  bug: "bg-red-500",
+  research: "bg-green-500",
+  plan: "bg-amber-500",
+}
+
+// Sortable Backlog Item
+function SortableBacklogItem({
+  task,
+  sprints,
+  onClick,
+  onAssignToSprint,
+}: {
+  task: Task
+  sprints: Sprint[]
+  onClick: () => void
+  onAssignToSprint: (sprintId: string) => void
+}) {
+  const {
+    attributes,
+    listeners,
+    setNodeRef,
+    transform,
+    transition,
+    isDragging,
+  } = useSortable({ id: task.id })
+
+  const style = {
+    transform: CSS.Transform.toString(transform),
+    transition,
+    opacity: isDragging ? 0.5 : 1,
+  }
+
+  const currentSprint = sprints.find((s) => s.id === task.sprintId)
+
+  return (
+    <Card
+      ref={setNodeRef}
+      style={style}
+      className="bg-slate-800 border-slate-700 hover:border-slate-600 transition-colors group"
+    >
+      <CardContent className="p-3">
+        <div className="flex items-center gap-3">
+          <div
+            {...attributes}
+            {...listeners}
+            className="opacity-0 group-hover:opacity-100 transition-opacity cursor-grab active:cursor-grabbing"
+          >
+            <GripVertical className="w-4 h-4 text-slate-500" />
+          </div>
+
+          <div className="flex-1 min-w-0" onClick={onClick}>
+            <div className="flex items-center gap-2 mb-1">
+              <Badge
+                className={`${typeColors[task.type]} text-white text-xs border-0`}
+              >
+                {typeLabels[task.type]}
+              </Badge>
+              <Badge
+                className={`${priorityColors[task.priority]} text-white text-xs`}
+              >
+                {task.priority}
+              </Badge>
+              {task.comments.length > 0 && (
+                <span className="text-xs text-slate-500">
+                  💬 {task.comments.length}
+                </span>
+              )}
+            </div>
+            <h4 className="text-sm font-medium text-slate-200 truncate">
+              {task.title}
+            </h4>
+          </div>
+
+          <div className="flex items-center gap-2">
+            {currentSprint ? (
+              <Badge variant="outline" className="text-xs border-blue-500 text-blue-400">
+                {currentSprint.name}
+              </Badge>
+            ) : (
+              <select
+                onChange={(e) => {
+                  if (e.target.value) {
+                    onAssignToSprint(e.target.value)
+                    e.target.value = ""
+                  }
+                }}
+                className="bg-slate-900 border border-slate-700 rounded px-2 py-1 text-xs text-slate-300 focus:outline-none focus:border-blue-500"
+                defaultValue=""
+              >
+                <option value="">+ Sprint</option>
+                {sprints.map((sprint) => (
+                  <option key={sprint.id} value={sprint.id}>
+                    {sprint.name}
+                  </option>
+                ))}
+              </select>
+            )}
+          </div>
+        </div>
+      </CardContent>
+    </Card>
+  )
+}
+
+// Drag Overlay Item
+function DragOverlayItem({ task }: { task: Task }) {
+  return (
+    <Card className="bg-slate-800 border-slate-600 shadow-xl rotate-1">
+      <CardContent className="p-3">
+        <div className="flex items-center gap-3">
+          <GripVertical className="w-4 h-4 text-slate-500" />
+          <div className="flex-1 min-w-0">
+            <div className="flex items-center gap-2 mb-1">
+              <Badge
+                className={`${typeColors[task.type]} text-white text-xs border-0`}
+              >
+                {typeLabels[task.type]}
+              </Badge>
+              <Badge
+                className={`${priorityColors[task.priority]} text-white text-xs`}
+              >
+                {task.priority}
+              </Badge>
+            </div>
+            <h4 className="text-sm font-medium text-slate-200 truncate">
+              {task.title}
+            </h4>
+          </div>
+        </div>
+      </CardContent>
+    </Card>
+  )
+}
+
+export function BacklogView() {
+  const {
+    tasks,
+    sprints,
+    selectedProjectId,
+    selectedTaskId,
+    updateTask,
+    selectTask,
+    addTask,
+  } = useTaskStore()
+
+  const [searchQuery, setSearchQuery] = useState("")
+  const [filterType, setFilterType] = useState<string>("all")
+  const [filterPriority, setFilterPriority] = useState<string>("all")
+  const [activeId, setActiveId] = useState<string | null>(null)
+  const [isCreatingTask, setIsCreatingTask] = useState(false)
+
+  // Sensors for drag detection
+  const sensors = useSensors(
+    useSensor(PointerSensor, {
+      activationConstraint: {
+        distance: 8,
+      },
+    })
+  )
+
+  // Get backlog tasks (backlog status, no sprint assigned)
+  const backlogTasks = tasks.filter(
+    (t) =>
+      t.projectId === selectedProjectId &&
+      t.status === "backlog" &&
+      !t.sprintId
+  )
+
+  // Filter tasks
+  const filteredTasks = backlogTasks.filter((task) => {
+    const matchesSearch = task.title
+      .toLowerCase()
+      .includes(searchQuery.toLowerCase())
+    const matchesType = filterType === "all" || task.type === filterType
+    const matchesPriority =
+      filterPriority === "all" || task.priority === filterPriority
+    return matchesSearch && matchesType && matchesPriority
+  })
+
+  // Sort by priority (urgent > high > medium > low)
+  const priorityOrder = { urgent: 0, high: 1, medium: 2, low: 3 }
+  const sortedTasks = [...filteredTasks].sort(
+    (a, b) => priorityOrder[a.priority] - priorityOrder[b.priority]
+  )
+
+  // Get project sprints
+  const projectSprints = sprints.filter((s) => s.projectId === selectedProjectId)
+
+  // Get active task for drag overlay
+  const activeTask = activeId ? tasks.find((t) => t.id === activeId) : null
+
+  const handleDragStart = (event: DragStartEvent) => {
+    setActiveId(event.active.id as string)
+  }
+
+  const handleDragEnd = (event: DragEndEvent) => {
+    const { active, over } = event
+    setActiveId(null)
+
+    if (!over) return
+
+    // Reordering logic would go here
+    // For now, just a placeholder for future implementation
+  }
+
+  const handleAssignToSprint = (taskId: string, sprintId: string) => {
+    updateTask(taskId, { sprintId })
+  }
+
+  const handleCreateTask = () => {
+    if (!selectedProjectId) return
+
+    addTask({
+      title: "New Backlog Item",
+      description: "",
+      type: "task",
+      priority: "medium",
+      status: "backlog",
+      projectId: selectedProjectId,
+      tags: [],
+    })
+    setIsCreatingTask(false)
+  }
+
+  return (
+    <DndContext
+      sensors={sensors}
+      collisionDetection={closestCorners}
+      onDragStart={handleDragStart}
+      onDragEnd={handleDragEnd}
+    >
+      <div className="space-y-4">
+        {/* Header */}
+        <div className="flex flex-col sm:flex-row sm:items-center justify-between gap-3">
+          <div className="flex items-center gap-2">
+            <div className="relative">
+              <Search className="absolute left-3 top-1/2 -translate-y-1/2 w-4 h-4 text-slate-500" />
+              <input
+                type="text"
+                placeholder="Search backlog..."
+                value={searchQuery}
+                onChange={(e) => setSearchQuery(e.target.value)}
+                className="pl-9 pr-4 py-2 bg-slate-800 border border-slate-700 rounded-lg text-sm text-slate-200 focus:outline-none focus:border-blue-500 w-full sm:w-64"
+              />
+            </div>
+            <select
+              value={filterType}
+              onChange={(e) => setFilterType(e.target.value)}
+              className="px-3 py-2 bg-slate-800 border border-slate-700 rounded-lg text-sm text-slate-200 focus:outline-none focus:border-blue-500"
+            >
+              <option value="all">All Types</option>
+              <option value="idea">💡 Idea</option>
+              <option value="task">📋 Task</option>
+              <option value="bug">🐛 Bug</option>
+              <option value="research">🔬 Research</option>
+              <option value="plan">📐 Plan</option>
+            </select>
+            <select
+              value={filterPriority}
+              onChange={(e) => setFilterPriority(e.target.value)}
+              className="px-3 py-2 bg-slate-800 border border-slate-700 rounded-lg text-sm text-slate-200 focus:outline-none focus:border-blue-500"
+            >
+              <option value="all">All Priorities</option>
+              <option value="urgent">Urgent</option>
+              <option value="high">High</option>
+              <option value="medium">Medium</option>
+              <option value="low">Low</option>
+            </select>
+          </div>
+          <Button onClick={handleCreateTask} size="sm">
+            <Plus className="w-4 h-4 mr-1" />
+            Add to Backlog
+          </Button>
+        </div>
+
+        {/* Stats */}
+        <div className="flex items-center gap-4 text-sm text-slate-400">
+          <span>
+            <strong className="text-slate-200">{backlogTasks.length}</strong> items in backlog
+          </span>
+          <span>•</span>
+          <span>
+            <strong className="text-slate-200">
+              {backlogTasks.filter((t) => t.priority === "urgent").length}
+            </strong>{" "}
+            urgent
+          </span>
+          <span>•</span>
+          <span>
+            <strong className="text-slate-200">
+              {backlogTasks.filter((t) => t.priority === "high").length}
+            </strong>{" "}
+            high priority
+          </span>
+        </div>
+
+        {/* Backlog List */}
+        {sortedTasks.length === 0 ? (
+          <div className="text-center py-12 text-slate-500">
+            {searchQuery || filterType !== "all" || filterPriority !== "all" ? (
+              <p>No items match your filters</p>
+            ) : (
+              <>
+                <p className="mb-4">Backlog is empty</p>
+                <Button onClick={handleCreateTask} variant="outline">
+                  <Plus className="w-4 h-4 mr-1" />
+                  Add First Item
+                </Button>
+              </>
+            )}
+          </div>
+        ) : (
+          <div className="space-y-2">
+            <SortableContext
+              items={sortedTasks.map((t) => t.id)}
+              strategy={verticalListSortingStrategy}
+            >
+              {sortedTasks.map((task) => (
+                <SortableBacklogItem
+                  key={task.id}
+                  task={task}
+                  sprints={projectSprints}
+                  onClick={() => selectTask(task.id)}
+                  onAssignToSprint={(sprintId) =>
+                    handleAssignToSprint(task.id, sprintId)
+                  }
+                />
+              ))}
+            </SortableContext>
+          </div>
+        )}
+
+        {/* Sprint Planning Section */}
+        {projectSprints.length > 0 && (
+          <div className="mt-8 pt-6 border-t border-slate-800">
+            <h3 className="text-lg font-medium text-slate-200 mb-4">
+              Sprint Planning
+            </h3>
+            <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-4">
+              {projectSprints.map((sprint) => {
+                const sprintTasks = tasks.filter((t) => t.sprintId === sprint.id)
+                const sprintPoints = sprintTasks.length // Simple count for now
+
+                return (
+                  <Card
+                    key={sprint.id}
+                    className="bg-slate-800 border-slate-700 cursor-pointer hover:border-blue-500 transition-colors"
+                    onClick={() => {
+                      // Switch to sprint view with this sprint selected
+                      // This would need to be passed up to parent or use store
+                    }}
+                  >
+                    <CardContent className="p-4">
+                      <div className="flex items-center justify-between mb-2">
+                        <h4 className="font-medium text-slate-200">
+                          {sprint.name}
+                        </h4>
+                        <Badge
+                          variant={
+                            sprint.status === "active"
+                              ? "default"
+                              : sprint.status === "completed"
+                              ? "secondary"
+                              : "outline"
+                          }
+                          className="text-xs"
+                        >
+                          {sprint.status}
+                        </Badge>
+                      </div>
+                      <p className="text-sm text-slate-400 line-clamp-2 mb-3">
+                        {sprint.goal || "No goal set"}
+                      </p>
+                      <div className="flex items-center justify-between text-xs text-slate-500">
+                        <span>{sprintTasks.length} tasks</span>
+                        <span>
+                          {new Date(sprint.startDate).toLocaleDateString()} -{" "}
+                          {new Date(sprint.endDate).toLocaleDateString()}
+                        </span>
+                      </div>
+                    </CardContent>
+                  </Card>
+                )
+              })}
+            </div>
+          </div>
+        )}
+      </div>
+
+      <DragOverlay>
+        {activeTask ? <DragOverlayItem task={activeTask} /> : null}
+      </DragOverlay>
+    </DndContext>
+  )
+}