diff --git a/src/App.spec.ts b/src/App.spec.ts
index 787d06c..5e01a05 100644
--- a/src/App.spec.ts
+++ b/src/App.spec.ts
@@ -5,6 +5,7 @@ import { createMemoryHistory } from 'vue-router'
 import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest'
 
 import { SCHEMA_VERSION } from '@/data/schema'
+import { useTaskStore } from '@/stores/tasks'
 
 import App from './App.vue'
 import { createAppRouter } from './router'
@@ -98,6 +99,22 @@ describe('App 端到端（真实 localStorage）', () => {
     expect(wrapper.findComponent({ name: 'PwaUpdatePrompt' }).exists()).toBe(true)
     wrapper.unmount()
   })
+
+  it('存储异常提示在应用级可见，切换视图也不消失', async () => {
+    const { wrapper, router } = await mountApp('/today')
+
+    const store = useTaskStore()
+    store.notice = '本地存储不可用'
+    await nextTick()
+
+    expect(wrapper.find('[role="alert"]').text()).toContain('本地存储不可用')
+
+    await router.push('/')
+    await nextTick()
+
+    expect(wrapper.find('[role="alert"]').text()).toContain('本地存储不可用')
+    wrapper.unmount()
+  })
 })
 
 describe('App 路由', () => {
diff --git a/src/App.vue b/src/App.vue
index 698b746..de95107 100644
--- a/src/App.vue
+++ b/src/App.vue
@@ -1,4 +1,5 @@
 <script setup lang="ts">
+import { storeToRefs } from 'pinia'
 import { onMounted } from 'vue'
 import { RouterView } from 'vue-router'
 
@@ -30,6 +31,7 @@ const CARD_SHORTCUTS = [
 const store = useTaskStore()
 const ui = useUiStore()
 const theme = useThemeStore()
+const { notice } = storeToRefs(store)
 
 onMounted(() => {
   store.init()
@@ -48,6 +50,18 @@ useKeyboardShortcuts({
   <div class="flex h-full min-h-0 flex-col bg-slate-100 dark:bg-zinc-950">
     <AppNav />
 
+    <!--
+      存储异常必须在两个视图都可见：今日视图同样会丢数据，
+      把提示放在应用级而不是看板里，避免「切到今日就看不见告警」。
+    -->
+    <p
+      v-if="notice"
+      role="alert"
+      class="border-b border-amber-300 bg-amber-50 px-4 py-2 text-sm text-amber-800 dark:border-amber-800 dark:bg-amber-950/60 dark:text-amber-300 md:px-6"
+    >
+      {{ notice }}
+    </p>
+
     <main class="flex min-h-0 flex-1 flex-col">
       <RouterView />
     </main>
@@ -86,9 +100,7 @@ useKeyboardShortcuts({
       </div>
     </dl>
 
-    <p class="mt-4 text-xs text-slate-400 dark:text-zinc-500">
-      在输入框内输入时不会触发快捷键。
-    </p>
+    <p class="mt-4 text-xs text-slate-400 dark:text-zinc-500">在输入框内输入时不会触发快捷键。</p>
   </SideDrawer>
 
   <ToastHost />
diff --git a/src/components/ToastHost.spec.ts b/src/components/ToastHost.spec.ts
index 2df8d1b..2fed450 100644
--- a/src/components/ToastHost.spec.ts
+++ b/src/components/ToastHost.spec.ts
@@ -46,9 +46,7 @@ describe('ToastHost', () => {
     store.show({ message: '已删除', action: { label: '撤销', run }, duration: 0 })
     await wrapper.vm.$nextTick()
 
-    const actionButton = wrapper
-      .findAll('button')
-      .find((node) => node.text() === '撤销')
+    const actionButton = wrapper.findAll('button').find((node) => node.text() === '撤销')
     expect(actionButton).toBeDefined()
 
     await actionButton?.trigger('click')
@@ -70,4 +68,25 @@ describe('ToastHost', () => {
     await wrapper.vm.$nextTick()
     expect(wrapper.find('[role="status"]').exists()).toBe(true)
   })
+
+  it('悬停时暂停自动关闭，移开后继续', async () => {
+    vi.useFakeTimers()
+    try {
+      const { store, wrapper } = setup()
+      store.show({ message: '可撤销', duration: 1000 })
+      await wrapper.vm.$nextTick()
+
+      const toast = wrapper.find('[role="status"]')
+      await toast.trigger('mouseenter')
+
+      vi.advanceTimersByTime(10_000)
+      expect(store.toasts).toHaveLength(1)
+
+      await toast.trigger('mouseleave')
+      vi.advanceTimersByTime(1000)
+      expect(store.toasts).toHaveLength(0)
+    } finally {
+      vi.useRealTimers()
+    }
+  })
 })
diff --git a/src/components/ToastHost.vue b/src/components/ToastHost.vue
index fd55a10..95c8b31 100644
--- a/src/components/ToastHost.vue
+++ b/src/components/ToastHost.vue
@@ -16,6 +16,10 @@ const { toasts } = storeToRefs(store)
       :key="toast.id"
       role="status"
       class="pointer-events-auto flex w-full max-w-sm items-center gap-3 rounded-md bg-slate-800 px-3 py-2 text-sm text-white shadow-panel dark:bg-zinc-100 dark:text-zinc-900"
+      @mouseenter="store.pause(toast.id)"
+      @mouseleave="store.resume(toast.id)"
+      @focusin="store.pause(toast.id)"
+      @focusout="store.resume(toast.id)"
     >
       <span class="min-w-0 flex-1 wrap-break-word">{{ toast.message }}</span>
 
diff --git a/src/stores/toast.spec.ts b/src/stores/toast.spec.ts
index 40aa5bf..7be0948 100644
--- a/src/stores/toast.spec.ts
+++ b/src/stores/toast.spec.ts
@@ -91,4 +91,50 @@ describe('toast store', () => {
     store.show({ message: 'B', duration: 0 })
     expect(store.toasts.map((toast) => toast.message)).toEqual(['A', 'B'])
   })
+
+  it('暂停后不再自动关闭，恢复后按剩余时间继续', () => {
+    const store = useToastStore()
+    const id = store.show({ message: '撤销我', duration: 1000 })
+
+    vi.advanceTimersByTime(600)
+    store.pause(id)
+
+    vi.advanceTimersByTime(10_000)
+    expect(store.toasts).toHaveLength(1)
+
+    store.resume(id)
+    vi.advanceTimersByTime(399)
+    expect(store.toasts).toHaveLength(1)
+
+    vi.advanceTimersByTime(1)
+    expect(store.toasts).toHaveLength(0)
+  })
+
+  it('重复暂停或恢复不会叠加计时器', () => {
+    const store = useToastStore()
+    const id = store.show({ message: 'x', duration: 1000 })
+
+    store.pause(id)
+    store.pause(id)
+    store.resume(id)
+    store.resume(id)
+
+    vi.advanceTimersByTime(999)
+    expect(store.toasts).toHaveLength(1)
+    vi.advanceTimersByTime(1)
+    expect(store.toasts).toHaveLength(0)
+  })
+
+  it('duration 为 0 时暂停与恢复无副作用', () => {
+    const store = useToastStore()
+    const id = store.show({ message: '常驻', duration: 0 })
+
+    expect(() => {
+      store.pause(id)
+      store.resume(id)
+    }).not.toThrow()
+
+    vi.advanceTimersByTime(60_000)
+    expect(store.toasts).toHaveLength(1)
+  })
 })
diff --git a/src/stores/toast.ts b/src/stores/toast.ts
index cec6e84..5d380c6 100644
--- a/src/stores/toast.ts
+++ b/src/stores/toast.ts
@@ -2,6 +2,9 @@
  * 轻量提示（Toast）状态（T09）
  *
  * 支持携带一个动作按钮，用于「删除后撤销」（T12）。
+ *
+ * 自动关闭是可暂停的：鼠标悬停 / 键盘聚焦时停表，移开后再按剩余时间继续。
+ * 否则用户正把指针移向「撤销」，提示先一步消失，删除就再无兜底。
  */
 
 import { defineStore } from 'pinia'
@@ -33,6 +36,10 @@ export const DEFAULT_TOAST_DURATION = 5000
 export const useToastStore = defineStore('toast', () => {
   const toasts = ref<ToastItem[]>([])
   const timers = new Map<string, ReturnType<typeof setTimeout>>()
+  /** 自动关闭的截止时间戳，暂停时用它与当前时间算出剩余量 */
+  const deadlines = new Map<string, number>()
+  /** 暂停中的提示还剩多少毫秒 */
+  const pausedRemaining = new Map<string, number>()
 
   function clearTimer(id: string): void {
     const timer = timers.get(id)
@@ -40,10 +47,21 @@ export const useToastStore = defineStore('toast', () => {
       clearTimeout(timer)
       timers.delete(id)
     }
+    deadlines.delete(id)
+  }
+
+  function scheduleAutoDismiss(id: string, delay: number): void {
+    clearTimer(id)
+    deadlines.set(id, Date.now() + delay)
+    timers.set(
+      id,
+      setTimeout(() => dismiss(id), delay),
+    )
   }
 
   function dismiss(id: string): void {
     clearTimer(id)
+    pausedRemaining.delete(id)
     toasts.value = toasts.value.filter((toast) => toast.id !== id)
   }
 
@@ -56,15 +74,35 @@ export const useToastStore = defineStore('toast', () => {
 
     toasts.value = [...toasts.value, item]
 
-    if (duration > 0) {
-      timers.set(
-        id,
-        setTimeout(() => dismiss(id), duration),
-      )
-    }
+    if (duration > 0) scheduleAutoDismiss(id, duration)
     return id
   }
 
+  /** 悬停 / 聚焦时暂停自动关闭；重复调用无副作用 */
+  function pause(id: string): void {
+    const timer = timers.get(id)
+    if (timer === undefined) return
+
+    const deadline = deadlines.get(id)
+    if (deadline === undefined) return
+
+    pausedRemaining.set(id, Math.max(0, deadline - Date.now()))
+    clearTimer(id)
+  }
+
+  /** 移开 / 失焦后按剩余时间继续计时 */
+  function resume(id: string): void {
+    const remaining = pausedRemaining.get(id)
+    if (remaining === undefined) return
+
+    pausedRemaining.delete(id)
+    if (remaining <= 0) {
+      dismiss(id)
+      return
+    }
+    scheduleAutoDismiss(id, remaining)
+  }
+
   /** 执行提示上的动作，并立即关闭该提示 */
   function runAction(id: string): void {
     const toast = toasts.value.find((item) => item.id === id)
@@ -74,8 +112,9 @@ export const useToastStore = defineStore('toast', () => {
 
   function clear(): void {
     for (const id of [...timers.keys()]) clearTimer(id)
+    pausedRemaining.clear()
     toasts.value = []
   }
 
-  return { toasts, show, dismiss, runAction, clear }
+  return { toasts, show, dismiss, pause, resume, runAction, clear }
 })
diff --git a/src/views/BoardView.spec.ts b/src/views/BoardView.spec.ts
index 0f09f5b..1c4701a 100644
--- a/src/views/BoardView.spec.ts
+++ b/src/views/BoardView.spec.ts
@@ -83,10 +83,11 @@ describe('BoardView 结构', () => {
     expect(sections[2]?.text()).toContain('已完成事项')
   })
 
-  it('存在存储提示时展示提示条', () => {
+  it('存在存储提示时由 App 统一展示（看板不再重复渲染）', () => {
     const { pinia, store } = setup()
     store.notice = '本地存储不可用'
-    expect(mountBoard(pinia).text()).toContain('本地存储不可用')
+    // 提示已提升到 App 层，BoardView 自身不应再渲染一遍
+    expect(mountBoard(pinia).text()).not.toContain('本地存储不可用')
   })
 })
 
@@ -167,7 +168,7 @@ describe('BoardView 详情抽屉', () => {
     expect(store.tasks[0]?.title).toBe('新标题')
   })
 
-  it('取消后抽屉关闭且数据不变', async () => {
+  it('有未保存修改时取消先确认，放弃后抽屉关闭且数据不变', async () => {
     const { pinia, store } = setup()
     store.createTask({ title: '原标题' })
     const wrapper = mountBoard(pinia)
@@ -180,6 +181,14 @@ describe('BoardView 详情抽屉', () => {
     await cancelButton?.trigger('click')
     await nextTick()
 
+    // 先给出确认，抽屉保持打开
+    expect(wrapper.text()).toContain('有未保存的修改')
+    expect(wrapper.find('input[aria-label="标题"]').exists()).toBe(true)
+
+    const discardButton = wrapper.findAll('button').find((node) => node.text() === '放弃修改')
+    await discardButton?.trigger('click')
+    await nextTick()
+
     expect(wrapper.find('input[aria-label="标题"]').exists()).toBe(false)
     expect(store.tasks[0]?.title).toBe('原标题')
   })
@@ -329,6 +338,8 @@ describe('BoardView 归档', () => {
 
     expect(wrapper.findAll('article')).toHaveLength(0)
     expect(wrapper.text()).toContain('已隐藏 1 个')
+    // 提示里要说明是归档造成的，否则用户不知道列内排序为什么拖不动
+    expect(wrapper.text()).toContain('归档 1')
   })
 
   it('开启「显示归档」后归档任务重新出现', async () => {
diff --git a/src/views/BoardView.vue b/src/views/BoardView.vue
index 0cb9a9f..696aebc 100644
--- a/src/views/BoardView.vue
+++ b/src/views/BoardView.vue
@@ -19,8 +19,7 @@ const store = useTaskStore()
 const filters = useFilterStore()
 const toast = useToastStore()
 const ui = useUiStore()
-const { notice } = storeToRefs(store)
-const { filter } = storeToRefs(filters)
+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)
@@ -54,6 +53,38 @@ const hiddenTotal = computed(() =>
   COLUMNS.reduce((total, column) => total + hiddenCounts.value[column.id], 0),
 )
 
+/**
+ * 被「隐藏归档」挡掉、且本来能通过当前筛选的任务数。
+ *
+ * 单独算一遍是为了给提示分层：用户看到「已隐藏 3 个」时，
+ * 应该知道其中多少是搜索/筛选造成的、多少只是归档没显示。
+ */
+const archivedHiddenTotal = computed(() => {
+  if (includeArchived.value) return 0
+  const archived = store.tasks.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
+})
+
+const filteredHiddenTotal = computed(() =>
+  Math.max(0, hiddenTotal.value - archivedHiddenTotal.value),
+)
+
+/**
+ * 列内排序在「渲染的是子集」时会被禁用（见 drag.ts），
+ * 这里把原因写出来，避免用户拖不动却不知道为什么。
+ */
+const hiddenNote = computed(() => {
+  if (hiddenTotal.value === 0) return undefined
+
+  const reasons: string[] = []
+  if (filteredHiddenTotal.value > 0) reasons.push(`筛选 ${filteredHiddenTotal.value}`)
+  if (archivedHiddenTotal.value > 0) reasons.push(`归档 ${archivedHiddenTotal.value}`)
+  const detail = reasons.length > 0 ? `（${reasons.join(' + ')}，列内排序已暂停）` : ''
+
+  return `已隐藏 ${hiddenTotal.value} 个${detail}`
+})
+
 const archivableTasks = computed(() => findArchivableTasks(store.tasks))
 
 function archiveCompleted(): void {
@@ -137,16 +168,10 @@ function handleKeyMove(payload: { id: string; direction: MoveDirection }): void
   <div class="flex min-h-0 flex-1 flex-col gap-3 p-4 md:p-6">
     <BoardToolbar
       ref="toolbarRef"
-      :hidden-note="hiddenTotal > 0 ? `· 已隐藏 ${hiddenTotal} 个` : undefined"
+      :hidden-note="hiddenNote"
       @archive="archiveCompleted"
     />
 
-    <p
-      v-if="notice"
-      class="rounded-lg border border-amber-300 bg-amber-50 px-3 py-2 text-sm text-amber-800"
-    >
-      {{ notice }}
-    </p>
 
     <!--
       移动端：整块区域滚动，各列按内容自然高度排布；