feat: 回收站、批量编辑、合并导入与标签治理

- 数据：Task 增加 deletedAt，schema v2→v3；删除改为软删除，保留 30 天后自动清理
- 回收站：支持恢复、永久删除、二次确认清空；导航栏入口带数量角标
- 批量编辑：多选后统一移动列、改优先级、标签增删、设置截止日、归档
- 合并导入：按 id 匹配、updatedAt 新者胜；覆盖/合并二选一，执行前自动快照
- 标签治理：全局重命名、合并、删除；回收站任务不参与改写
- 看板语义读取统一改用 activeTasks，避免已删除任务泄漏到统计、今日与标签下拉
- UI：回收站图标与备份统一尺寸；批量编辑条统一控件高度并分组
- 测试：705 个单测通过，补充迁移、回收站、批量编辑、合并与标签用例

src/views/BoardView.vue

@@ -12,7 +12,7 @@ import { useFilterStore } from '@/stores/filters'
 import { useTaskStore } from '@/stores/tasks'
 import { useToastStore } from '@/stores/toast'
 import { useUiStore } from '@/stores/ui'
-import { COLUMNS, type ColumnId, type MoveDirection } from '@/types/task'
+import { COLUMNS, PRIORITY_LABELS, type ColumnId, type MoveDirection, type Priority } from '@/types/task'
 import { findArchivableTasks } from '@/utils/archive'
 import { filterTasks } from '@/utils/filter'
 import { groupByColumn } from '@/utils/sortOrder'
@@ -25,7 +25,9 @@ const { filter, includeArchived } = storeToRefs(filters)
 
 /** 详情抽屉当前编辑的任务 id；任务被删除后自动变为 null，抽屉随之关闭 */
 const editingId = ref<string | null>(null)
-const editingTask = computed(() => store.tasks.find((task) => task.id === editingId.value) ?? null)
+const editingTask = computed(
+  () => store.activeTasks.find((task) => task.id === editingId.value) ?? null,
+)
 
 /** 批量添加面板 */
 const batchOpen = ref(false)
@@ -43,7 +45,7 @@ function setColumnRef(element: unknown, index: number): void {
 }
 
 /** 实际渲染的看板：先按条件筛选，再按列分组，列计数随之反映结果 */
-const visibleColumns = computed(() => groupByColumn(filterTasks(store.tasks, filter.value)))
+const visibleColumns = computed(() => groupByColumn(filterTasks(store.activeTasks, filter.value)))
 
 /**
  * 每列被隐藏的数量（被筛选掉 + 已归档）。
@@ -70,7 +72,7 @@ const hiddenTotal = computed(() =>
  */
 const archivedHiddenTotal = computed(() => {
   if (includeArchived.value) return 0
-  const archived = store.tasks.filter((task) => task.archivedAt !== null)
+  const archived = store.activeTasks.filter((task) => task.archivedAt !== null)
   // filter.includeArchived 为 false 时会把归档任务直接排除，这里显式放开
   return filterTasks(archived, { ...filter.value, includeArchived: true }).length
 })
@@ -94,7 +96,7 @@ const hiddenNote = computed(() => {
   return `已隐藏 ${hiddenTotal.value} 个${detail}`
 })
 
-const archivableTasks = computed(() => findArchivableTasks(store.tasks))
+const archivableTasks = computed(() => findArchivableTasks(store.activeTasks))
 
 function archiveCompleted(): void {
   const targets = archivableTasks.value
@@ -127,7 +129,7 @@ useKeyboardShortcuts({
 })
 
 function toggleTask(id: string): void {
-  const task = store.tasks.find((item) => item.id === id)
+  const task = store.activeTasks.find((item) => item.id === id)
   if (!task) return
   store.updateTask(id, { status: task.status === 'done' ? 'todo' : 'done' })
 }
@@ -152,7 +154,7 @@ function handleMove(payload: { id: string; toColumn: ColumnId; toIndex: number }
  * 上下调顺序则要求该列渲染的是全量，否则下标没有意义。
  */
 function handleKeyMove(payload: { id: string; direction: MoveDirection }): void {
-  const task = store.tasks.find((item) => item.id === payload.id)
+  const task = store.activeTasks.find((item) => item.id === payload.id)
   if (!task) return
 
   if (payload.direction === 'left' || payload.direction === 'right') {
@@ -183,7 +185,9 @@ const visibleTaskIds = computed(() =>
 )
 
 /** 真正存在的已选任务：跨标签页同步等情况下可能出现已不存在的 id */
-const selectedTasks = computed(() => store.tasks.filter((task) => selectedIds.value.has(task.id)))
+const selectedTasks = computed(() =>
+  store.activeTasks.filter((task) => selectedIds.value.has(task.id)),
+)
 const selectedCount = computed(() => selectedTasks.value.length)
 
 function toggleSelectMode(): void {
@@ -226,6 +230,63 @@ function removeSelected(): void {
   })
 }
 
+/* ---------- 批量编辑 ---------- */
+
+/** 一次批量操作只写一次仓库；返回实际更新数量便于提示 */
+function selectedTaskIds(): string[] {
+  return selectedTasks.value.map((task) => task.id)
+}
+
+function batchMove(status: ColumnId): void {
+  const count = store.updateTasks(selectedTaskIds(), { status })
+  if (count === 0) return
+  const title = COLUMNS.find((column) => column.id === status)?.title ?? status
+  toast.show({ message: `已把 ${count} 个任务移动到「${title}」` })
+}
+
+function batchPriority(priority: Priority): void {
+  const count = store.updateTasks(selectedTaskIds(), { priority })
+  if (count === 0) return
+  toast.show({ message: `已将 ${count} 个任务设为「${PRIORITY_LABELS[priority]}」优先级` })
+}
+
+function batchAddTag(tag: string): void {
+  const count = store.updateTasks(selectedTaskIds(), { addTags: [tag] })
+  if (count === 0) return
+  toast.show({ message: `已为 ${count} 个任务添加标签「${tag}」` })
+}
+
+function batchRemoveTag(tag: string): void {
+  const count = store.updateTasks(selectedTaskIds(), { removeTags: [tag] })
+  if (count === 0) return
+  toast.show({ message: `已从 ${count} 个任务移除标签「${tag}」` })
+}
+
+function batchDue(date: string | null): void {
+  const count = store.updateTasks(selectedTaskIds(), { dueDate: date })
+  if (count === 0) return
+  toast.show({
+    message: date
+      ? `已将 ${count} 个任务的截止日期设为 ${date}`
+      : `已清除 ${count} 个任务的截止日期`,
+  })
+}
+
+/** 批量归档后卡片会从看板消失，因此退出多选并给一次撤销入口 */
+function batchArchive(): void {
+  const ids = selectedTaskIds()
+  if (ids.length === 0) return
+
+  const count = store.archiveTasks(ids)
+  if (count === 0) return
+
+  exitSelection()
+  toast.show({
+    message: `已归档 ${count} 个任务`,
+    action: { label: '撤销', run: () => store.unarchiveTasks(ids) },
+  })
+}
+
 /**
  * 筛选条件一变就清空选择：选择必须始终对应「眼前看得到的卡片」，
  * 否则会出现「删掉了看不见的任务」这种难以预料的结果。
@@ -244,16 +305,24 @@ watch(filter, () => {
       @archive="archiveCompleted"
       @batch-add="batchOpen = true"
       @toggle-select="toggleSelectMode"
+      @manage-tags="ui.openTags()"
     />
 
     <BatchSelectionBar
       v-if="selecting"
       :count="selectedCount"
       :total="visibleTaskIds.length"
+      :tags="store.allTags"
       @select-all="selectAllVisible"
       @clear="clearSelection"
       @remove="removeSelected"
       @done="exitSelection"
+      @move="batchMove"
+      @priority="batchPriority"
+      @add-tag="batchAddTag"
+      @remove-tag="batchRemoveTag"
+      @due="batchDue"
+      @archive="batchArchive"
     />
 
     <!--