diff --git a/docs/dev/20261017-implementation.md b/docs/dev/20261017-implementation.md
index 6ca6beb..9c37fe0 100644
--- a/docs/dev/20261017-implementation.md
+++ b/docs/dev/20261017-implementation.md
@@ -182,6 +182,29 @@ LessonReminderTracker 只读取服务端已解析的当天 ScheduleDto 投影，
 课前 60 秒开始：3 秒强调遮罩后显示实时秒数和课程时间，持续到上课；上课遮罩 5 秒后退出。
 下课先提示 2 秒，再预告下节课程 10 秒；当天最后一课下课只提示 5 秒。不补弹已经过去的上下课事件。
 刷新同一课表不会重置遮罩，临时换课立即更新名称，移除课程或退出账号会取消提醒。
-提醒是独立本机状态，不写入教师通知、未读计数或通知队列；已经打开的通知详情和紧急提示优先展示。
+提醒是独立本机状态，不写入教师通知、未读计数或通知队列；用户主动打开的通知详情和紧急提示优先展示，自动补弹的普通通知不再挡住上下课提醒。
 经典与自定义两种布局使用同一个 LessonReminderContent；原生窗口仍为固定画布，自定义岛用自然尺寸缩放适配。
 本次只移植课表可见提醒和动画，不自动启用语音与音效。
+
+## 课程进度、即将下课与主窗口编辑（本批补齐）
+
+- 对照上游 `LessonControlExpanded.axaml` 的 `LeftSeconds` 和 `ProgressPercent`，课程组件增加持续的本节进度条与距下课时间，课间自动显示下一课；起止时间保持在课程名右侧，按秒更新。
+- 倒计时组件支持自动上下课、本节下课、下一节课、放学四种目标，按当天课表排序，排除其它日期。已有配置缺少新字段时自动补齐。
+- 默认最后 60 秒显示即将下课倒数；经典岛在上课遮罩后持续显示本节课程、剩余时间与进度，自定义岛平时由组件显示进度，时间点提醒接管同一个岛体。
+- 设置→提醒提供课前、上课、即将下课、下课独立开关，以及经典岛课中进度开关；课前提前 5–1800 秒，下课倒数提前 5–600 秒，保存后即刻生效。
+- 自定义编辑器移到主窗口 `/settings/island/editor`；设置和兼容 IPC 入口都导航到主窗口，浮岛不再被扩大成全屏编辑窗口。主窗口保留侧栏，画布按内容与可用空间自动缩放，支持触摸跨行拖动、容器和独立常态/展开内容。
+- 编辑使用独立预览，不上报桌面岛尺寸；配置保存按顺序执行。关闭编辑返回灵动岛设置。
+
+## 管理后台界面与二级菜单
+
+按用户确认，本批“重写后端”指 Web 管理后台界面与导航。参考 art-design-pro 的 sidebar-menu、breadcrumb、header-bar，重写工作区框架，服务端接口、鉴权和既有业务页面保留。
+
+- 工作台、教学事务、班级与人员、设备运维、系统管理五个一级分组；原有全部业务入口位于二级菜单。
+- 菜单直接读取路由的标题、图标、角色与生效权限；空分组隐藏，搜索结果和页签也按相同权限过滤，深链继续经过路由守卫。
+- 增加面包屑、最多 20 个可关闭页签、关闭其它页签、Ctrl+K 功能搜索；页签保留该页面的完整查询参数。
+- 统一浅/深主题下的侧栏、顶栏、卡片、表格和页面留白；仪表盘增加真实账号欢迎区与按权限显示的快捷入口。手机端使用同一棵二级菜单的抽屉。
+- 回归使用独立临时 SQLite、临时教师和班级；不读取或改写真实班级业务数据。
+
+### 老师消息阅读背景
+
+通知、作业、叫人内容展示时，两种布局统一使用 `#202020` 不透明背景，原生窗口透明度临时为 1，玻璃风格和用户设置的透明度不会降低消息可读性。常驻组件、空闲展开和课程提醒仍按原有透明度显示，收起消息后恢复本机透明度偏好。
diff --git a/docs/reference.md b/docs/reference.md
index 6ddc738..dfa0772 100644
--- a/docs/reference.md
+++ b/docs/reference.md
@@ -1604,3 +1604,9 @@ makensis 临时目录、ClassIsland 路径与日志编码等）。这里只列
 迁移选择同一时段 ID 最小的行，全部原行仍保留；旧数据未记录的群组、临时层和时间点名称无法恢复。
 
 实施选择、问题根因与实测结果见 [实施记录](dev/20261017-implementation.md)。
+
+## 2026-10-17 课程状态与管理后台导航
+
+课程右侧信息与本节进度参考 [LessonControlExpanded](https://github.com/ClassIsland/ClassIsland/blob/master/ClassIsland.Core/Controls/LessonsControls/LessonControlExpanded.axaml)。新增课中距下课、末段秒数倒数及独立提醒设置；主窗口中的自定义编辑页保留组件拖动与方案管理。
+
+管理后台结构参考 [art-design-pro](https://github.com/Daymychen/art-design-pro) 的 `art-sidebar-menu`、`SidebarSubmenu`、`art-breadcrumb` 与 `art-header-bar`；采用 Vue 3 / Element Plus 原有技术栈，重新实现分组菜单、面包屑、页签和搜索，业务接口和权限校验保持原有入口。
diff --git a/packages/desktop-client/src/island/ComponentInspector.vue b/packages/desktop-client/src/island/ComponentInspector.vue
index 94049d3..2ef5928 100644
--- a/packages/desktop-client/src/island/ComponentInspector.vue
+++ b/packages/desktop-client/src/island/ComponentInspector.vue
@@ -63,7 +63,9 @@ const fonts = {
         <label v-else-if="node.kind === 'countdown'" class="field">
           倒计时目标
           <select v-model="node.settings.target">
+            <option value="auto">自动：课中距下课，课间距上课</option>
             <option value="next">下一节课</option>
+            <option value="end">本节下课</option>
             <option value="school">放学</option>
           </select>
         </label>
@@ -95,6 +97,10 @@ const fonts = {
             <span>显示课程时间</span>
             <input type="checkbox" v-model="node.settings.showPeriod" />
           </label>
+          <label class="toggle-field">
+            <span>显示上课进度条</span>
+            <input type="checkbox" v-model="node.settings.showProgress" />
+          </label>
         </template>
         <template v-else-if="['group', 'stack', 'slide', 'rolling'].includes(node.kind)">
           <label class="field">
diff --git a/packages/desktop-client/src/island/ComponentNode.vue b/packages/desktop-client/src/island/ComponentNode.vue
index 19040a7..d4c2c7f 100644
--- a/packages/desktop-client/src/island/ComponentNode.vue
+++ b/packages/desktop-client/src/island/ComponentNode.vue
@@ -2,6 +2,7 @@
 import { computed, type CSSProperties } from 'vue';
 import {
   ISLAND_COMPONENT_LABELS,
+  resolveClassStatus,
   type IslandComponentNode,
   type IslandState,
   type ScheduleDto,
@@ -23,16 +24,35 @@ function select(event: MouseEvent) {
   emit('select', props.node.id);
 }
 const container = computed(() => ['group', 'stack', 'slide', 'rolling'].includes(props.node.kind));
-const current = computed(() => {
-  const d = new Date(props.now),
-    t = `${String(d.getHours()).padStart(2, '0')}:${String(d.getMinutes()).padStart(2, '0')}`;
-  return props.schedules.find((s) => s.startTime <= t && s.endTime > t);
-});
-const next = computed(() => {
-  const d = new Date(props.now),
-    t = `${String(d.getHours()).padStart(2, '0')}:${String(d.getMinutes()).padStart(2, '0')}`;
-  return props.schedules.find((s) => s.startTime > t);
-});
+const today = computed(() =>
+  props.schedules
+    .filter((s) => s.dayOfWeek === (new Date(props.now).getDay() || 7))
+    .sort((a, b) => a.startTime.localeCompare(b.startTime)),
+);
+const status = computed(() => resolveClassStatus(today.value, new Date(props.now)));
+const current = computed(() => today.value.find((s) => s.id === status.value.current?.scheduleId));
+const next = computed(() => today.value.find((s) => s.id === status.value.next?.scheduleId));
+function timeAt(time: string) {
+  const d = new Date(props.now);
+  const [h, m] = time.split(':').map(Number);
+  d.setHours(h!, m!, 0, 0);
+  return d.getTime();
+}
+const elapsed = computed(() =>
+  current.value
+    ? Math.max(
+        0,
+        Math.min(
+          1,
+          (props.now - timeAt(current.value.startTime)) /
+            Math.max(1, timeAt(current.value.endTime) - timeAt(current.value.startTime)),
+        ),
+      )
+    : 0,
+);
+const remaining = computed(() =>
+  current.value ? Math.max(0, Math.ceil((timeAt(current.value.endTime) - props.now) / 1000)) : 0,
+);
 const hidden = computed(
   () =>
     !props.editing &&
@@ -75,21 +95,27 @@ const content = computed(() => {
           .replaceAll('{course}', current.value?.course?.name || '暂无课程')
       : n.settings.text;
   if (n.kind === 'countdown') {
-    const time = n.settings.target === 'school' ? props.schedules.at(-1)?.endTime : next.value?.startTime;
+    const ending = n.settings.target === 'end' || (n.settings.target === 'auto' && !!current.value);
+    const time =
+      n.settings.target === 'school'
+        ? today.value.at(-1)?.endTime
+        : ending
+          ? current.value?.endTime
+          : next.value?.startTime;
     if (!time) return '今日课程已结束';
     const [h, m] = time.split(':').map(Number);
     const end = new Date(d);
     end.setHours(h!, m!, 0, 0);
     const left = Math.max(0, Math.ceil((end.getTime() - props.now) / 1000));
-    return `${n.settings.target === 'school' ? '距放学' : '距上课'} ${Math.floor(left / 60)}:${String(left % 60).padStart(2, '0')}`;
+    return `${n.settings.target === 'school' ? '距放学' : ending ? '距下课' : '距上课'} ${Math.floor(left / 60)}:${String(left % 60).padStart(2, '0')}`;
   }
   return '';
 });
 const lessons = computed(() =>
   props.node.settings.display === 'today'
-    ? props.schedules.slice(0, props.node.settings.count)
-    : [props.node.settings.display === 'next' ? next.value : current.value].filter((s): s is ScheduleDto =>
-        Boolean(s),
+    ? today.value.slice(0, props.node.settings.count)
+    : [props.node.settings.display === 'next' ? next.value : current.value || next.value].filter(
+        (s): s is ScheduleDto => Boolean(s),
       ),
 );
 const style = computed<CSSProperties>(() => {
@@ -166,8 +192,22 @@ const style = computed<CSSProperties>(() => {
       <div v-for="s in lessons" :key="s.id" class="lesson-line">
         <strong>{{ s.course?.name }}</strong>
         <small v-if="node.settings.showPeriod" class="lesson-time">{{ s.startTime }}–{{ s.endTime }}</small>
+        <small v-if="node.settings.showProgress && current?.id === s.id" class="lesson-remaining">
+          距下课 {{ Math.floor(remaining / 60) }}:{{ String(remaining % 60).padStart(2, '0') }}
+        </small>
       </div>
       <span v-if="!lessons.length">暂无课程</span>
+      <div
+        v-if="current && node.settings.showProgress && node.settings.display !== 'next'"
+        class="lesson-progress"
+        role="progressbar"
+        :aria-valuenow="Math.round(elapsed * 100)"
+        :aria-valuemin="0"
+        :aria-valuemax="100"
+        :aria-label="`${current.course?.name}课程进度，距下课${remaining}秒`"
+      >
+        <i :style="{ transform: `scaleX(${elapsed})` }" />
+      </div>
     </template>
     <template v-else-if="['notification', 'homework', 'call'].includes(node.kind)">
       <slot v-if="node.id === alertNodeId" name="alerts" />
@@ -197,7 +237,7 @@ const style = computed<CSSProperties>(() => {
 .countdown {
   white-space: nowrap;
 }
-.schedule > div {
+.schedule > .lesson-line {
   display: flex;
   flex-direction: row;
   align-items: center;
@@ -215,9 +255,29 @@ const style = computed<CSSProperties>(() => {
   font-variant-numeric: tabular-nums;
   white-space: nowrap;
 }
-.schedule > div + div {
+.lesson-progress {
+  position: absolute;
+  inset: auto 4px 0;
+  height: 2px;
+  background: #ffffff24;
+  overflow: hidden;
+}
+.lesson-progress i {
+  display: block;
+  height: 100%;
+  background: var(--island-accent, #60a5fa);
+  transform-origin: left;
+  transition: transform 1s linear;
+}
+.schedule > .lesson-line + .lesson-line {
   margin-top: 8px;
 }
+.lesson-remaining {
+  font-size: var(--secondary, 14px);
+  font-variant-numeric: tabular-nums;
+  opacity: 0.8;
+  white-space: nowrap;
+}
 .separator > span {
   display: block;
   width: 1px;
diff --git a/packages/desktop-client/src/island/CustomIsland.vue b/packages/desktop-client/src/island/CustomIsland.vue
index 044979b..b3e0fb2 100644
--- a/packages/desktop-client/src/island/CustomIsland.vue
+++ b/packages/desktop-client/src/island/CustomIsland.vue
@@ -22,6 +22,7 @@ const props = defineProps<{
   editing: boolean;
   appearance: IslandAppearance;
   schedules: ScheduleDto[];
+  embedded?: boolean;
 }>();
 const emit = defineEmits<{
   save: [settings: IslandLayoutSettings];
@@ -115,6 +116,10 @@ function switchScheme() {
 const now = ref(Date.now()),
   canvasScale = ref(1),
   pan = ref({ x: 0, y: 0 });
+const canvas = ref<HTMLElement>();
+const previewStage = ref<HTMLElement>();
+const autoScale = ref(1);
+const previewScale = computed(() => canvasScale.value * autoScale.value);
 const shell = ref<HTMLElement>(),
   inner = ref<HTMLElement>();
 const viewport = ref({ width: 0, height: 0 });
@@ -358,6 +363,21 @@ let observer: ResizeObserver | undefined,
 function measure() {
   clearTimeout(measureTimer);
   measureTimer = setTimeout(() => {
+    if (props.embedded && shell.value && canvas.value) {
+      const padding = getComputedStyle(canvas.value);
+      const availableWidth =
+        canvas.value.clientWidth - parseFloat(padding.paddingLeft) - parseFloat(padding.paddingRight);
+      const availableHeight =
+        canvas.value.clientHeight - parseFloat(padding.paddingTop) - parseFloat(padding.paddingBottom);
+      autoScale.value = Math.min(
+        1,
+        Math.max(80, availableWidth) /
+          Math.max(1, previewStage.value?.offsetWidth ?? shell.value.offsetWidth),
+        Math.max(100, availableHeight) /
+          Math.max(1, previewStage.value?.offsetHeight ?? shell.value.offsetHeight),
+      );
+      return;
+    }
     if (inner.value) {
       // 内部组件的自然尺寸决定整个岛体；提醒不再拥有另一层岛壳。
       const rect = inner.value.getBoundingClientRect(),
@@ -387,6 +407,8 @@ onMounted(() => {
   clock = setInterval(() => (now.value = Date.now()), 1000);
   observer = new ResizeObserver(measure);
   if (inner.value) observer.observe(inner.value);
+  if (canvas.value) observer.observe(canvas.value);
+  if (previewStage.value) observer.observe(previewStage.value);
   stopViewport = window.island?.onViewport((v) => (viewport.value = v));
   measure();
 });
@@ -400,6 +422,7 @@ onUnmounted(() => {
 <template>
   <div
     :class="editing ? 'layout-editor' : 'custom-window'"
+    :data-embedded="embedded || undefined"
     @pointerdown.capture="onPointerDown"
     @pointermove="panMove"
     @pointerup="
@@ -482,7 +505,7 @@ onUnmounted(() => {
         </button>
       </div>
     </aside>
-    <main :class="{ canvas: editing }" @pointerdown="panStart">
+    <main ref="canvas" :class="{ canvas: editing }" @pointerdown="panStart">
       <div v-if="editing" class="canvas-toolbar">
         <nav class="surface-tabs" aria-label="编辑自定义灵动岛内容">
           <button :class="{ active: editingSurface === 'compact' }" @click="setSurface('compact')">
@@ -513,8 +536,9 @@ onUnmounted(() => {
         </div>
       </div>
       <div
+        ref="previewStage"
         class="preview-stage"
-        :style="editing ? { transform: `translate(${pan.x}px,${pan.y}px) scale(${canvasScale})` } : {}"
+        :style="editing ? { transform: `translate(${pan.x}px,${pan.y}px) scale(${previewScale})` } : {}"
       >
         <div
           ref="shell"
diff --git a/packages/desktop-client/src/island/CustomIslandRuntime.vue b/packages/desktop-client/src/island/CustomIslandRuntime.vue
index 9b0557f..212bb19 100644
--- a/packages/desktop-client/src/island/CustomIslandRuntime.vue
+++ b/packages/desktop-client/src/island/CustomIslandRuntime.vue
@@ -254,8 +254,8 @@ function measure() {
 }
 function resizeCanvas(width = innerWidth, height = innerHeight) {
   available.value = {
-    width: Math.max(40, width - 2 * ISLAND_SHADOW_PAD - 4),
-    height: Math.max(40, height - 2 * ISLAND_SHADOW_PAD - 4),
+    width: Math.max(40, Math.min(width, innerWidth) - 2 * ISLAND_SHADOW_PAD - 4),
+    height: Math.max(40, Math.min(height, innerHeight) - 2 * ISLAND_SHADOW_PAD - 4),
   };
   measure();
 }
@@ -263,6 +263,7 @@ const resize = () => resizeCanvas();
 let stopViewport: (() => void) | undefined;
 function visibility() {
   visible.value = !document.hidden;
+  resize();
   void nextTick(reportHit);
 }
 // 不深度监听整份状态；只在目标内容/几何变化时测量，时钟每秒只改文本。
@@ -285,7 +286,11 @@ watch(
 onMounted(() => {
   resize();
   stopViewport = window.island?.onViewport((v) => resizeCanvas(v.width, v.height));
-  observer = new ResizeObserver(measure);
+  observer = new ResizeObserver((entries) => {
+    if (entries.some((entry) => entry.target === document.documentElement)) resize();
+    else measure();
+  });
+  observer.observe(document.documentElement);
   if (compact.value) observer.observe(compact.value);
   if (details.value) observer.observe(details.value);
   if (lessonSource.value) observer.observe(lessonSource.value);
@@ -327,6 +332,7 @@ onUnmounted(() => {
         call: state.active?.kind === 'call',
         'resident-separated': scheme.separated && !expanded && !lesson,
         'resident-lesson': !!lesson,
+        'message-surface': expanded && messages.length > 0 && !lesson,
       }"
       :style="style"
       :role="expanded ? 'region' : 'button'"
diff --git a/packages/desktop-client/src/island/IslandApp.vue b/packages/desktop-client/src/island/IslandApp.vue
index fd4d232..9265f87 100644
--- a/packages/desktop-client/src/island/IslandApp.vue
+++ b/packages/desktop-client/src/island/IslandApp.vue
@@ -389,6 +389,7 @@ const islandClass = computed(() => ({
   'hidden-placeholder':
     mode.value === 'hidden' && !appearance.value.idleSliver && !state.value.lessonReminder,
   'ci-lesson-card': !!state.value.lessonReminder,
+  'message-surface': !!state.value.active && mode.value !== 'hidden' && !state.value.lessonReminder,
   sliver: mode.value === 'hidden' && appearance.value.idleSliver,
   urgent: isUrgent.value,
   call: isCall.value,
diff --git a/packages/desktop-client/src/island/LayoutIslandApp.vue b/packages/desktop-client/src/island/LayoutIslandApp.vue
index ec597f2..f752535 100644
--- a/packages/desktop-client/src/island/LayoutIslandApp.vue
+++ b/packages/desktop-client/src/island/LayoutIslandApp.vue
@@ -1,24 +1,21 @@
 <script setup lang="ts">
-import { nextTick, onMounted, onUnmounted, ref, shallowRef } from 'vue';
+import { nextTick, onMounted, onUnmounted, ref } from 'vue';
 import {
   defaultIslandLayouts,
   DEFAULT_ISLAND_APPEARANCE,
   type IslandAppearance,
-  type IslandLayoutSettings,
   type IslandState,
   type ScheduleDto,
 } from '@classhelper/shared';
 import FixedIsland from './IslandApp.vue';
-import CustomIsland from './CustomIsland.vue';
+import './custom-island.css';
 import CustomIslandRuntime from './CustomIslandRuntime.vue';
 const settings = ref(defaultIslandLayouts()),
-  editing = ref(false),
   ready = ref(false);
 const schedules = ref<ScheduleDto[]>([]);
 const appearance = ref<IslandAppearance>({ ...DEFAULT_ISLAND_APPEARANCE });
 const nativeVisible = ref(false);
-const alertHost = shallowRef<HTMLElement | null>(null);
-const resident = () => settings.value.layout === 'custom' && !editing.value;
+const resident = () => settings.value.layout === 'custom';
 const state = ref<IslandState>({
   mode: 'hidden',
   active: null,
@@ -30,13 +27,6 @@ const state = ref<IslandState>({
   maxCardHeight: 1024,
   updatedAt: 0,
 });
-async function save(value: IslandLayoutSettings) {
-  settings.value = await window.island!.saveLayout(JSON.parse(JSON.stringify(value)));
-}
-async function done() {
-  editing.value = false;
-  await window.island?.setEditing(false);
-}
 let heartbeat: ReturnType<typeof setInterval>;
 onUnmounted(() => clearInterval(heartbeat));
 onMounted(async () => {
@@ -44,7 +34,6 @@ onMounted(async () => {
   const bridge = window.island;
   if (bridge) {
     bridge.onLayout((value) => (settings.value = value));
-    bridge.onEditing((value) => (editing.value = value));
     bridge.onSchedules((value) => (schedules.value = value));
     bridge.onState((value) => (state.value = value));
     bridge.onAppearance((value) => (appearance.value = value));
@@ -54,7 +43,6 @@ onMounted(async () => {
     settings.value = await bridge.getLayout();
     schedules.value = await bridge.getSchedules();
     state.value = await bridge.getState();
-    editing.value = await bridge.getEditing();
   }
   await nextTick();
   ready.value = true;
@@ -69,26 +57,5 @@ onMounted(async () => {
     :appearance="appearance"
     :native-visible="nativeVisible"
   />
-  <CustomIsland
-    v-else-if="settings.layout === 'custom'"
-    :settings="settings"
-    :state="state"
-    :editing="editing"
-    :appearance="appearance"
-    :schedules="schedules"
-    @save="save"
-    @done="done"
-    @host="alertHost = $event"
-  />
-  <Teleport
-    v-if="ready"
-    :disabled="resident() || settings.layout === 'fixed' || !alertHost"
-    :to="alertHost || 'body'"
-  >
-    <FixedIsland
-      v-show="!resident() && (settings.layout === 'fixed' || !!alertHost)"
-      :embedded="settings.layout === 'custom'"
-      :suspended="resident()"
-    />
-  </Teleport>
+  <FixedIsland v-if="ready" v-show="!resident()" :suspended="resident()" />
 </template>
diff --git a/packages/desktop-client/src/island/LessonReminderContent.vue b/packages/desktop-client/src/island/LessonReminderContent.vue
index 6b635d7..6c7247e 100644
--- a/packages/desktop-client/src/island/LessonReminderContent.vue
+++ b/packages/desktop-client/src/island/LessonReminderContent.vue
@@ -12,17 +12,39 @@ const root = ref<HTMLElement>();
 const width = ref(480);
 const mask = computed(() => props.now < props.reminder.maskUntil);
 const title = computed(
-  () => ({ prepare: '即将上课', 'on-class': '上课', break: '课间休息' })[props.reminder.kind],
+  () =>
+    ({
+      prepare: '即将上课',
+      'on-class': '上课',
+      break: '课间休息',
+      ending: '即将下课',
+      'in-class': '正在上课',
+    })[props.reminder.kind],
 );
 const leftSeconds = computed(() =>
-  Math.max(0, Math.ceil((props.reminder.lessonStartsAt - props.now) / 1000)),
+  Math.max(
+    0,
+    Math.ceil(
+      ((props.reminder.kind === 'ending' || props.reminder.kind === 'in-class'
+        ? props.reminder.lessonEndsAt
+        : props.reminder.lessonStartsAt)! -
+        props.now) /
+        1000,
+    ),
+  ),
 );
 const progress = computed(() =>
   Math.max(
     0,
     Math.min(
       1,
-      (props.reminder.endsAt - props.now) / Math.max(1, props.reminder.endsAt - props.reminder.startedAt),
+      props.reminder.kind === 'in-class' || props.reminder.kind === 'ending'
+        ? (props.now - props.reminder.lessonStartsAt) /
+            Math.max(
+              1,
+              (props.reminder.lessonEndsAt ?? props.reminder.endsAt) - props.reminder.lessonStartsAt,
+            )
+        : (props.reminder.endsAt - props.now) / Math.max(1, props.reminder.endsAt - props.reminder.startedAt),
     ),
   ),
 );
@@ -107,19 +129,36 @@ onUnmounted(() => {
     aria-live="polite"
   >
     <div class="ci-lesson-info">
-      <span v-if="reminder.kind === 'prepare'" class="ci-countdown">
-        距上课还剩
+      <span
+        v-if="reminder.kind === 'prepare' || reminder.kind === 'ending' || reminder.kind === 'in-class'"
+        class="ci-countdown"
+      >
+        {{ reminder.kind === 'prepare' ? '距上课还剩' : '距下课还剩' }}
         <strong>{{ leftSeconds }}</strong>
         秒
       </span>
       <span v-else class="ci-countdown">课间休息</span>
       <span class="ci-lesson-course">
-        <span>下节课是：</span>
+        <span>
+          {{
+            reminder.kind === 'ending' || reminder.kind === 'on-class' || reminder.kind === 'in-class'
+              ? '本节课：'
+              : '下节课是：'
+          }}
+        </span>
         <strong>{{ course }}</strong>
         <small>{{ time }}</small>
       </span>
     </div>
-    <div class="ci-lesson-progress" :style="{ transform: `scaleX(${progress})` }" />
+    <div
+      class="ci-lesson-progress"
+      role="progressbar"
+      :aria-valuenow="Math.round(progress * 100)"
+      aria-valuemin="0"
+      aria-valuemax="100"
+      aria-label="课程与提醒进度"
+      :style="{ transform: `scaleX(${progress})` }"
+    />
     <svg class="ci-mask" :viewBox="`0 0 ${width} 40`" preserveAspectRatio="none" aria-hidden="true">
       <polygon v-for="(points, i) in polygons" :key="i" :points="points" />
     </svg>
diff --git a/packages/desktop-client/src/island/classic-island.css b/packages/desktop-client/src/island/classic-island.css
index c6bb205..b7ac9ff 100644
--- a/packages/desktop-client/src/island/classic-island.css
+++ b/packages/desktop-client/src/island/classic-island.css
@@ -80,6 +80,10 @@ body {
   --wn-bg: #0b0b0f;
   --wn-border: rgba(255, 255, 255, 0.14);
 }
+/* 阅读老师消息时使用实色底，玻璃风格也不透出桌面。 */
+.island-card.message-surface {
+  --wn-bg: #202020;
+}
 
 .island-card.hidden-placeholder {
   visibility: hidden;
diff --git a/packages/desktop-client/src/island/custom-runtime.css b/packages/desktop-client/src/island/custom-runtime.css
index 891e048..15a2936 100644
--- a/packages/desktop-client/src/island/custom-runtime.css
+++ b/packages/desktop-client/src/island/custom-runtime.css
@@ -250,3 +250,6 @@
   fill: transparent;
   stroke: none;
 }
+.resident-window .resident-card.message-surface {
+  --wn-bg: #202020;
+}
diff --git a/packages/desktop-client/src/main/index.ts b/packages/desktop-client/src/main/index.ts
index af5c6bc..59d67ba 100644
--- a/packages/desktop-client/src/main/index.ts
+++ b/packages/desktop-client/src/main/index.ts
@@ -227,6 +227,13 @@ if (!gotLock) {
           mainWindow.show();
           mainWindow.focus();
         });
+        island.setEditLayoutHandler(() => {
+          if (!mainWindow || mainWindow.isDestroyed()) return;
+          if (mainWindow.isMinimized()) mainWindow.restore();
+          mainWindow.show();
+          mainWindow.focus();
+          mainWindow.webContents.send('island:open-editor');
+        });
         // 灵动岛点"标为已读"：转交主窗口渲染进程调用接口并刷新通知中心
         island.setMarkReadHandler((id) => {
           if (!mainWindow || mainWindow.isDestroyed()) return;
diff --git a/packages/desktop-client/src/main/island.ts b/packages/desktop-client/src/main/island.ts
index c5d496d..79b3c14 100644
--- a/packages/desktop-client/src/main/island.ts
+++ b/packages/desktop-client/src/main/island.ts
@@ -171,7 +171,7 @@ class IslandController {
       !this.previewId &&
       !(
         this.state.active &&
-        (this.state.mode === 'expanded' ||
+        (this.explicitShowId === this.state.active.id ||
           (this.state.active.priority === 'URGENT' && this.state.mode !== 'hidden'))
       ),
     );
@@ -183,7 +183,13 @@ class IslandController {
     this.refreshLessonReminder();
   }
   private refreshLessonReminder(): void {
-    const next = this.lessonTracker.update(this.schedules, new Date(this.lessonTestTime ?? Date.now()));
+    let next = this.lessonTracker.update(
+      this.schedules,
+      new Date(this.lessonTestTime ?? Date.now()),
+      getConfig().islandLayout.lessonReminders,
+    );
+    // 自定义布局由课程组件持续显示进度，时间点提醒才临时接管岛体。
+    if (this.customLayout && next?.kind === 'in-class') next = null;
     if (JSON.stringify(next) === JSON.stringify(this.lessonCue)) return;
     this.lessonCue = next;
     // 触摸窗口先放得下新横条，再下发内容；混合宽高变化也只能增大画布。
@@ -209,6 +215,15 @@ class IslandController {
   private boundsFrame: number | null = null;
   /** 外观设置（设置页可调，主进程持久化） */
   private appearance: IslandAppearance = { ...DEFAULT_ISLAND_APPEARANCE };
+  /** 阅读消息时同时关闭原生窗口透明度，防止实色 CSS 仍被窗口整体淡化。 */
+  private get displayOpacity(): number {
+    const readingMessage =
+      this.state.active &&
+      this.state.mode !== 'hidden' &&
+      (!this.customLayout || this.state.mode === 'expanded') &&
+      !this.lessonShowing;
+    return readingMessage ? 1 : this.appearance.opacity;
+  }
   /** 当前是否接收鼠标（固定大包围盒窗口默认穿透，由渲染进程按命中动态打开） */
   /** 是否允许"失焦自动收起"（冒烟可临时关闭，避免焦点抖动干扰断言） */
   private blurCollapseEnabled = true;
@@ -289,6 +304,7 @@ class IslandController {
     return this.editingLayout;
   }
   syncCustomLayout(): void {
+    this.refreshLessonReminder();
     if (this.residentEnabled !== this.residentWasEnabled) {
       this.residentFaded = false;
       this.residentWasEnabled = this.residentEnabled;
@@ -317,42 +333,12 @@ class IslandController {
       this.syncWindow();
     }, 320);
   }
+  private editLayoutHandler: (() => void) | null = null;
+  setEditLayoutHandler(handler: () => void): void {
+    this.editLayoutHandler = handler;
+  }
   editLayout(enabled = true): void {
-    if (enabled) this.residentFaded = false;
-    if (this.layoutSettleTimer) clearTimeout(this.layoutSettleTimer);
-    this.layoutSettleTimer = null;
-    this.settlingLayout = false;
-    this.editingLayout = enabled;
-    this.syncResidentShape();
-    if (enabled) saveConfig({ islandLayout: { ...getConfig().islandLayout, layout: 'custom' } });
-    this.win?.webContents.send('island:layout', getConfig().islandLayout);
-    this.win?.webContents.send('island:editing', enabled);
-    if (this.win && !this.win.isDestroyed()) {
-      this.win.hide();
-      if (enabled) {
-        const area = screen.getDisplayNearestPoint(this.win.getBounds()).workArea;
-        this.win.setBounds(area);
-        this.win.setOpacity(1);
-        if (!(process.env.ELECTRON_SMOKE_TEST === '1' && process.env.ELECTRON_SMOKE_MODE !== 'visual')) {
-          this.win.show();
-          this.win.focus();
-        }
-        this.setInteractive(true, '布局编辑');
-      } else {
-        const area = screen.getDisplayNearestPoint(this.win.getBounds()).workArea;
-        this.customSize = {
-          width: Math.max(40, Math.min(this.customDesiredSize.width, area.width - 2 * ISLAND_SHADOW_PAD)),
-          height: Math.max(24, Math.min(this.customDesiredSize.height, area.height - 2 * ISLAND_SHADOW_PAD)),
-        };
-        this.win.webContents.send('island:viewport', this.customSize);
-        this.applyWindowLayout();
-        if (this.customLayout) {
-          // 退出编辑先保持隐藏，等行工具栏移除、渲染器防抖测量和主进程防抖完成。
-          // 避免把编辑器的占位高度带回常态岛；收缩仍全部发生在不可见期间。
-          this.settleCustomLayout();
-        } else this.syncWindow();
-      }
-    }
+    if (enabled) this.editLayoutHandler?.();
   }
   reportCustomSize(value: { width: number; height: number }): void {
     if (
@@ -1393,7 +1379,7 @@ class IslandController {
       if (this.residentEnabled) this.applyFocusable();
       this.updateResidentPointer();
       this.win.setOpacity(
-        this.appearance.opacity * (this.residentFaded ? CLASSISLAND_ISLAND_METRICS.fadedOpacity : 1),
+        this.displayOpacity * (this.residentFaded ? CLASSISLAND_ISLAND_METRICS.fadedOpacity : 1),
       );
       if (
         !this.win.isVisible() &&
@@ -1408,7 +1394,7 @@ class IslandController {
     if (this.lessonShowing) {
       this.cancelFade();
       if (!this.win.isVisible()) this.applyWindowLayout();
-      this.win.setOpacity(this.appearance.opacity);
+      this.win.setOpacity(this.displayOpacity);
       if (!(process.env.ELECTRON_SMOKE_TEST === '1' && process.env.ELECTRON_SMOKE_MODE !== 'visual'))
         this.win.showInactive();
       this.syncHitFromCursor();
@@ -1441,7 +1427,7 @@ class IslandController {
       this.setInteractive(false, '隐藏态');
       if (this.appearance.idleSliver) {
         this.cancelFade();
-        this.win.setOpacity(this.appearance.opacity);
+        this.win.setOpacity(this.displayOpacity);
         if (!this.win.isVisible()) this.win.showInactive();
         // 细缝也要"可见即可点"：按真实光标位置决定是否接收鼠标
         this.syncHitFromCursor();
@@ -1454,8 +1440,8 @@ class IslandController {
     // 岛应该可见：**必须**先取消可能还在跑的淡出 —— 否则那次淡出会继续把透明度降到 0
     // 并 hide() 掉窗口，造成"状态是胶囊/展开、窗口却被隐藏"的错位（岛看着在、点不动或直接消失）。
     this.cancelFade();
-    if (this.win.getOpacity() !== this.appearance.opacity) {
-      this.win.setOpacity(this.appearance.opacity);
+    if (this.win.getOpacity() !== this.displayOpacity) {
+      this.win.setOpacity(this.displayOpacity);
     }
     if (!this.win.isVisible()) {
       // 窗口位置由固定包围盒决定（applyWindowLayout），这里只负责显示
@@ -1628,7 +1614,7 @@ class IslandController {
 
   private fadeIn(): void {
     if (!this.win || this.win.isDestroyed()) return;
-    const target = this.appearance.opacity;
+    const target = this.displayOpacity;
     if (!this.appearance.animations) {
       this.fadeToken += 1;
       this.win.setOpacity(target);
@@ -1721,7 +1707,7 @@ class IslandController {
       this.win.setAlwaysOnTop(this.appearance.alwaysOnTop, 'screen-saver');
       if (this.win.isVisible()) {
         // 显示中：立即应用透明度（隐藏时由 fadeIn 负责）
-        this.win.setOpacity(this.appearance.opacity);
+        this.win.setOpacity(this.displayOpacity);
       }
     }
     this.emitAppearance();
@@ -1828,7 +1814,7 @@ class IslandController {
       !overControl;
     if (faded === this.residentFaded) return;
     this.residentFaded = faded;
-    this.win.setOpacity(this.appearance.opacity * (faded ? CLASSISLAND_ISLAND_METRICS.fadedOpacity : 1));
+    this.win.setOpacity(this.displayOpacity * (faded ? CLASSISLAND_ISLAND_METRICS.fadedOpacity : 1));
   }
 
   /** 当前岛体矩形（供冒烟验证） */
diff --git a/packages/desktop-client/src/main/lesson-reminder.ts b/packages/desktop-client/src/main/lesson-reminder.ts
index 560a549..f84dc8a 100644
--- a/packages/desktop-client/src/main/lesson-reminder.ts
+++ b/packages/desktop-client/src/main/lesson-reminder.ts
@@ -1,6 +1,8 @@
 import {
   dayKeyLocal,
   resolveClassStatus,
+  DEFAULT_LESSON_REMINDERS,
+  type LessonReminderSettings,
   type IslandLessonReminder,
   type ScheduleDto,
 } from '@classhelper/shared';
@@ -13,7 +15,11 @@ import {
 export class LessonReminderTracker {
   private current: IslandLessonReminder | null = null;
 
-  update(schedules: ScheduleDto[], now: Date): IslandLessonReminder | null {
+  update(
+    schedules: ScheduleDto[],
+    now: Date,
+    settings: LessonReminderSettings = DEFAULT_LESSON_REMINDERS,
+  ): IslandLessonReminder | null {
     const at = now.getTime();
     const keyOf = (s: ScheduleDto, kind: IslandLessonReminder['kind']) =>
       `${dayKeyLocal(now)}:${s.id}:${s.startTime}:${s.endTime}:${kind}`;
@@ -32,10 +38,11 @@ export class LessonReminderTracker {
       .sort((a, b) => b.endTime.localeCompare(a.endTime))[0];
     let kind: IslandLessonReminder['kind'] | null = null;
     let lesson: ScheduleDto | undefined;
-    if (current && at - timeAt(current.startTime) < 5_000) {
+    if (current && at - timeAt(current.startTime) < 5_000 && settings.onClassEnabled) {
       kind = 'on-class';
       lesson = current;
     } else if (
+      settings.breakEnabled &&
       !current &&
       ended &&
       at - timeAt(ended.endTime) < (next ? 12_000 : 5_000) &&
@@ -43,9 +50,24 @@ export class LessonReminderTracker {
     ) {
       kind = 'break';
       lesson = ended;
-    } else if (!current && next && timeAt(next.startTime) - at <= 60_000) {
+    } else if (
+      current &&
+      settings.endingEnabled &&
+      timeAt(current.endTime) - at <= settings.endingSeconds * 1000
+    ) {
+      kind = 'ending';
+      lesson = current;
+    } else if (
+      !current &&
+      next &&
+      settings.prepareEnabled &&
+      timeAt(next.startTime) - at <= settings.prepareSeconds * 1000
+    ) {
       kind = 'prepare';
       lesson = next;
+    } else if (current && settings.classProgressEnabled) {
+      kind = 'in-class';
+      lesson = current;
     }
     if (!lesson || !kind) return (this.current = null);
     const id = keyOf(lesson, kind);
@@ -60,13 +82,23 @@ export class LessonReminderTracker {
       endTime: lesson.endTime,
       startedAt: entered,
       maskUntil:
-        kind === 'prepare'
-          ? Math.min(start, entered + 3000)
-          : kind === 'break' && next
-            ? entered + 2000
-            : entered + 5000,
-      endsAt: kind === 'prepare' ? start : kind === 'on-class' ? start + 5000 : end + (next ? 12_000 : 5000),
+        kind === 'ending' || kind === 'in-class'
+          ? entered
+          : kind === 'prepare'
+            ? Math.min(start, entered + 3000)
+            : kind === 'break' && next
+              ? entered + 2000
+              : entered + 5000,
+      endsAt:
+        kind === 'ending' || kind === 'in-class'
+          ? end
+          : kind === 'prepare'
+            ? start
+            : kind === 'on-class'
+              ? start + 5000
+              : end + (next ? 12_000 : 5000),
       lessonStartsAt: start,
+      lessonEndsAt: end,
       nextCourseName: kind === 'break' ? next?.course?.name : undefined,
       nextStartTime: kind === 'break' ? next?.startTime : undefined,
       nextEndTime: kind === 'break' ? next?.endTime : undefined,
diff --git a/packages/desktop-client/src/main/smoke-layout.ts b/packages/desktop-client/src/main/smoke-layout.ts
index 9f8de49..4b73c53 100644
--- a/packages/desktop-client/src/main/smoke-layout.ts
+++ b/packages/desktop-client/src/main/smoke-layout.ts
@@ -1,4 +1,5 @@
 import fs from 'node:fs';
+import { BrowserWindow } from 'electron';
 import path from 'node:path';
 import { island } from './island.js';
 import { getConfig, saveConfig } from './config.js';
@@ -11,6 +12,10 @@ export async function verifyLayoutSmoke(
   await island.init(null);
   island.setTestInputPassthrough(true);
   const win = island.getWindow()!;
+  const editor = BrowserWindow.getAllWindows().find(
+    (w) => w !== win && !w.isDestroyed() && /\/index\.html(?:#|$)/.test(w.webContents.getURL()),
+  )!;
+  let editingBounds = win.getBounds();
   const pause = () => new Promise<void>((r) => setTimeout(r, 400));
   try {
     await pause();
@@ -27,27 +32,40 @@ export async function verifyLayoutSmoke(
       );
     });
     await check('自定义编辑模式可进入并添加组件行', async () => {
-      island.editLayout();
+      saveConfig({ islandLayout: { ...defaultIslandLayouts(), layout: 'custom' } });
+      island.syncCustomLayout();
       await pause();
-      return win.webContents.executeJavaScript(
-        `(() => { const b=[...document.querySelectorAll('button')].find(b=>b.textContent.includes('在下方新建'));b?.click();return Boolean(document.querySelector('.layout-editor')); })()`,
+      editingBounds = win.getBounds();
+      await editor.webContents.executeJavaScript('window.__classhelperSmoke__.islandEditorSmoke(true)');
+      await pause();
+      return (
+        (await editor.webContents.executeJavaScript(
+          'location.hash.includes("/settings/island/editor") && Boolean(document.querySelector(".aside"))',
+        )) &&
+        editor.webContents.executeJavaScript(
+          `(() => { const b=[...document.querySelectorAll('button')].find(b=>b.textContent.includes('在下方新建'));b?.click();return Boolean(document.querySelector('.layout-editor')); })()`,
+        )
       );
     });
     await check('触摸拖动可跨行并持久化', async () => {
       await pause();
-      await win.webContents.executeJavaScript(`(() => {
+      const dragGeometry = await editor.webContents.executeJavaScript(`(() => {
         const handle=document.querySelector('.node-handle[data-kind=clock]');
         const row=document.querySelectorAll('[data-row]')[1]; if(!handle||!row)throw Error('缺少拖动目标');
         const r=row.getBoundingClientRect(); const x=r.left+Math.min(20,r.width/2),y=r.top+r.height/2;
         handle.dispatchEvent(new PointerEvent('pointerdown',{bubbles:true,pointerId:19,pointerType:'touch',clientX:10,clientY:10}));
         handle.dispatchEvent(new PointerEvent('pointermove',{bubbles:true,pointerId:19,pointerType:'touch',clientX:x,clientY:y}));
         handle.dispatchEvent(new PointerEvent('pointerup',{bubbles:true,pointerId:19,pointerType:'touch',clientX:x,clientY:y}));
+        return {row:r.toJSON(), point:{x,y}, hit:document.elementFromPoint(x,y)?.outerHTML.slice(0,600), canvas:document.querySelector('.canvas')?.getBoundingClientRect().toJSON(), stage:document.querySelector('.preview-stage')?.getBoundingClientRect().toJSON()};
       })()`);
       await pause();
-      return getConfig().islandLayout.schemes[0]?.rows[1]?.nodes.some((n) => n.kind === 'clock') === true;
+      const moved =
+        getConfig().islandLayout.schemes[0]?.rows[1]?.nodes.some((n) => n.kind === 'clock') === true;
+      if (!moved) throw new Error(JSON.stringify(dragGeometry));
+      return true;
     });
     await check('组件可以包裹进容器且设置独立保存', async () => {
-      await win.webContents.executeJavaScript(
+      await editor.webContents.executeJavaScript(
         `(() => { const select=document.querySelector('[data-action=wrap]');if(!select)throw Error('未选中组件');select.value='group';select.dispatchEvent(new Event('change',{bubbles:true})); })()`,
       );
       await pause();
@@ -58,38 +76,58 @@ export async function verifyLayoutSmoke(
       );
     });
     await check('组件设置按内容外观高级切换，整体外观单独显示', async () => {
-      const initial = await win.webContents.executeJavaScript(`(() => {
+      const initial = await editor.webContents.executeJavaScript(`(() => {
         const panel=document.querySelector('.settings');
         return panel?.textContent.includes('显示内容') && !panel.textContent.includes('字体大小') && !panel.textContent.includes('背景颜色');
       })()`);
-      await win.webContents.executeJavaScript(`document.querySelectorAll('.panel-tabs button')[1].click()`);
+      await editor.webContents.executeJavaScript(
+        `document.querySelectorAll('.panel-tabs button')[1].click()`,
+      );
       await pause();
-      const appearance = await win.webContents.executeJavaScript(`(() => {
+      const appearance = await editor.webContents.executeJavaScript(`(() => {
         const panel=document.querySelector('.settings');
         return panel?.textContent.includes('字体大小') && !panel.textContent.includes('组件操作');
       })()`);
-      await win.webContents.executeJavaScript(`document.querySelectorAll('.panel-tabs button')[2].click()`);
+      await editor.webContents.executeJavaScript(
+        `document.querySelectorAll('.panel-tabs button')[2].click()`,
+      );
       await pause();
-      const advanced = await win.webContents.executeJavaScript(`(() => {
+      const advanced = await editor.webContents.executeJavaScript(`(() => {
         const panel=document.querySelector('.settings');
         return panel?.textContent.includes('隐藏条件') && !panel.textContent.includes('字体大小');
       })()`);
-      await win.webContents.executeJavaScript(`document.querySelectorAll('.panel-tabs button')[0].click()`);
+      await editor.webContents.executeJavaScript(
+        `document.querySelectorAll('.panel-tabs button')[0].click()`,
+      );
       await pause();
       return initial && appearance && advanced;
     });
+    await check('主窗口编辑器的预览完整适配画布且不遮挡缩放控件', async () => {
+      return editor.webContents.executeJavaScript(`(() => {
+        const stage=document.querySelector('.preview-stage')?.getBoundingClientRect();
+        const canvas=document.querySelector('.canvas')?.getBoundingClientRect();
+        const footer=document.querySelector('.canvas-footer')?.getBoundingClientRect();
+        return Boolean(stage&&canvas&&footer&&stage.left>=canvas.left&&stage.right<=canvas.right&&stage.bottom<=footer.top-4);
+      })()`);
+    });
     if (process.env.ISLAND_SHOTS_DIR) {
       fs.mkdirSync(process.env.ISLAND_SHOTS_DIR, { recursive: true });
       fs.writeFileSync(
         path.join(process.env.ISLAND_SHOTS_DIR, 'custom-editor.png'),
-        (await win.webContents.capturePage()).toPNG(),
+        (await editor.webContents.capturePage()).toPNG(),
       );
     }
     await check('退出编辑后配置可从 getConfig 读回', async () => {
-      island.editLayout(false);
+      await editor.webContents.executeJavaScript('document.querySelector(".done-button")?.click()');
       await pause();
-      return !island.getEditingLayout() && getConfig().islandLayout.schemes[0]!.rows.length === 2;
+      return (
+        !island.getEditingLayout() &&
+        getConfig().islandLayout.schemes[0]!.rows.length === 2 &&
+        !editor.webContents.getURL().includes('/editor') &&
+        win.getBounds().width === editingBounds.width
+      );
     });
+    await editor.webContents.executeJavaScript('window.__classhelperSmoke__.islandEditorSmoke(false)');
     await check('自定义岛统一使用固定画布且常态组件居中适配', async () => {
       await pause();
       return win.webContents.executeJavaScript(`(() => {
@@ -145,6 +183,8 @@ export async function verifyLayoutSmoke(
     });
     await verifyResidentSmoke(check);
   } finally {
+    if (editor && !editor.isDestroyed())
+      await editor.webContents.executeJavaScript('window.__classhelperSmoke__.islandEditorSmoke(false)');
     saveConfig({ islandLayout: original });
     island.syncCustomLayout();
     win.hide();
diff --git a/packages/desktop-client/src/main/smoke-resident.ts b/packages/desktop-client/src/main/smoke-resident.ts
index 08f97ce..8af9dc8 100644
--- a/packages/desktop-client/src/main/smoke-resident.ts
+++ b/packages/desktop-client/src/main/smoke-resident.ts
@@ -110,7 +110,7 @@ export async function verifyResidentSmoke(
       changed?.courseName === '临时换课' &&
       changed.maskUntil === prepare.maskUntil &&
       onClass?.kind === 'on-class' &&
-      !noLate &&
+      noLate?.kind === 'in-class' &&
       breaking?.kind === 'break' &&
       breaking.nextCourseName === '语文' &&
       !after &&
@@ -119,6 +119,32 @@ export async function verifyResidentSmoke(
       !removed
     );
   });
+  await check('即将下课倒数边界与四个提醒通道独立生效，旧配置自动补默认值', () => {
+    const settings = { ...defaultIslandLayouts().lessonReminders, classProgressEnabled: false };
+    const tracker = new LessonReminderTracker();
+    const before = tracker.update(lessonFixtures, dateAt(9, 43, 59), settings);
+    const ending = tracker.update(lessonFixtures, dateAt(9, 44), settings);
+    const disabled = tracker.update(lessonFixtures, dateAt(9, 44, 1), { ...settings, endingEnabled: false });
+    const prepareDisabled = tracker.update(lessonFixtures, dateAt(8, 59), {
+      ...settings,
+      prepareEnabled: false,
+    });
+    const startDisabled = tracker.update(lessonFixtures, dateAt(9, 0), {
+      ...settings,
+      onClassEnabled: false,
+    });
+    const breakDisabled = tracker.update(lessonFixtures, dateAt(9, 45), { ...settings, breakEnabled: false });
+    return (
+      !before &&
+      ending?.kind === 'ending' &&
+      ending.endsAt === dateAt(9, 45).getTime() &&
+      !disabled &&
+      !prepareDisabled &&
+      !startDisabled &&
+      !breakDisabled &&
+      normalizeIslandLayouts({ layout: 'custom' }).lessonReminders.endingEnabled
+    );
+  });
   scheme.rows[0]!.nodes = [
     islandNode('clock', 'resident-clock'),
     islandNode('separator', 'resident-separator'),
@@ -557,7 +583,59 @@ export async function verifyResidentSmoke(
         }
         await setTime(9, 0, 6);
         await pause(700);
-        if (island.getState().lessonReminder) return false;
+        if (
+          layout === 'custom'
+            ? island.getState().lessonReminder
+            : island.getState().lessonReminder?.kind !== 'in-class'
+        )
+          return false;
+        await setTime(9, 22, 30);
+        if (layout === 'custom') {
+          const progressLayout = JSON.parse(JSON.stringify(fixture));
+          progressLayout.schemes[0].rows[0].nodes = [islandNode('schedule', 'lesson-progress-course')];
+          saveConfig({ islandLayout: progressLayout });
+          island.syncCustomLayout();
+        }
+        await pause(1100);
+        const half = await win.webContents.executeJavaScript(`(() => {
+          const root=document.querySelector('${layout === 'custom' ? '.resident-compact' : '.ci-fixed-lesson'}');
+          return Boolean(root&&root.textContent.includes('数学')&&root.textContent.includes('距下课')&&Number(root.querySelector('[role=progressbar]')?.getAttribute('aria-valuenow'))===50);
+        })()`);
+        if (!half)
+          throw new Error(
+            layout +
+              '课中进度错误：' +
+              (await win.webContents.executeJavaScript(
+                'document.querySelector(".resident-compact, .ci-fixed-lesson")?.textContent',
+              )),
+          );
+        await shot('lesson-progress-' + layout);
+        if (layout === 'custom') {
+          const countdownLayout = JSON.parse(JSON.stringify(fixture));
+          countdownLayout.schemes[0].rows[0].nodes = [islandNode('countdown', 'lesson-progress-countdown')];
+          saveConfig({ islandLayout: countdownLayout });
+          island.syncCustomLayout();
+          await pause(1100);
+          if (
+            !(await win.webContents.executeJavaScript(
+              `document.querySelector('.resident-compact .countdown')?.textContent.includes('距下课 22:30')`,
+            ))
+          )
+            throw new Error('自动倒计时未切到本节下课');
+        }
+        if (layout === 'custom') {
+          saveConfig({ islandLayout: { ...fixture, layout } });
+          island.syncCustomLayout();
+        }
+        await setTime(9, 44);
+        await pause(700);
+        if (island.getState().lessonReminder?.kind !== 'ending')
+          throw new Error(layout + '下课倒数状态错误：' + JSON.stringify(island.getState().lessonReminder));
+        const ending = await win.webContents.executeJavaScript(
+          `document.querySelector('${layout === 'custom' ? '.resident-lesson-page' : '.ci-fixed-lesson'}')?.textContent.includes('距下课还剩')`,
+        );
+        if (!ending) throw new Error(layout + '下课倒数未渲染');
+        await shot('lesson-ending-' + layout);
         await setTime(9, 45);
         island.setClassState({ inClass: false });
         await pause(700);
@@ -671,36 +749,60 @@ export async function verifyResidentSmoke(
       island.setTouchMode(false);
     }
   });
-  await check('常驻和无通知展开内容可独立编辑并持久化', async () => {
+  await check('编辑入口交给主窗口，浮岛不会变成额外的全屏编辑窗口', async () => {
+    const before = win.getBounds();
+    let opened = false;
+    island.setEditLayoutHandler(() => {
+      opened = true;
+    });
     island.editLayout();
-    await pause();
-    await win.webContents.executeJavaScript(
-      `(() => {const button=[...document.querySelectorAll('.surface-tabs button')].find(b=>b.textContent.includes('无通知'));button?.click();})()`,
-    );
-    await pause(200);
-    await win.webContents.executeJavaScript(
-      `document.querySelector('[data-node="resident-expanded-text"]')?.click()`,
-    );
-    await pause(200);
-    await win.webContents.executeJavaScript(
-      `(() => {const input=document.querySelector('.settings textarea');if(!input)throw Error('未找到展开文本设置');input.value='放学前检查';input.dispatchEvent(new Event('input',{bubbles:true}));input.dispatchEvent(new Event('change',{bubbles:true}));})()`,
-    );
-    await pause();
-    const saved = getConfig().islandLayout.schemes[0]!;
-    const independent =
-      saved.rows[0]!.nodes.find((n) => n.id === 'resident-compact-text')?.settings.text === '常驻概览' &&
-      saved.expandedRows[0]!.nodes.find((n) => n.id === 'resident-expanded-text')?.settings.text ===
-        '放学前检查';
-    await shot('resident-editor');
-    island.editLayout(false);
-    await pause();
-    const roundtrip = normalizeIslandLayouts(JSON.parse(JSON.stringify(getConfig().islandLayout)));
+    await pause(100);
     return (
-      independent &&
-      roundtrip.residentEnabled &&
-      roundtrip.schemes[0]!.expandedRows[0]!.nodes.some((n) => n.settings.text === '放学前检查')
+      opened &&
+      !island.getEditingLayout() &&
+      JSON.stringify(before) === JSON.stringify(win.getBounds()) &&
+      !(await win.webContents.executeJavaScript('Boolean(document.querySelector(".layout-editor"))'))
     );
   });
+  await check('通知、作业、叫人均使用不透明背景和原生窗口，收起后恢复常驻透明度', async () => {
+    const appearance = island.getAppearance();
+    try {
+      island.setAppearance({ style: 'glass', opacity: 0.45, animations: false });
+      island.setClassState({ inClass: false, schedules: [] });
+      for (const layout of ['custom', 'fixed'] as const) {
+        saveConfig({ islandLayout: { ...fixture, layout } });
+        island.syncCustomLayout();
+        await pause(400);
+        for (const kind of ['notification', 'homework', 'call'] as const) {
+          island.handleAction({ action: 'dismiss-all' });
+          island.pushNotification({
+            ...message('opaque-' + layout + '-' + kind, '老师发来的消息', 'NORMAL'),
+            kind,
+          });
+          island.handleAction({ action: 'expand' });
+          await pause(300);
+          const solid = await win.webContents.executeJavaScript(`(() => {
+            const card=document.querySelector('${layout === 'custom' ? '.resident-card' : '.island-card'}');
+            if (!card?.classList.contains('message-surface')) return false;
+            const probe=document.createElement('span');probe.style.background='var(--wn-bg)';card.append(probe);
+            const color=getComputedStyle(probe).backgroundColor;probe.remove();
+            return color==='rgb(32, 32, 32)'&&!!card.querySelector('.classic-notifications');
+          })()`);
+          if (!solid || Math.abs(win.getOpacity() - 1) > 0.01 || island.getAppearance().opacity !== 0.45)
+            return false;
+          if (kind === 'notification') await shot('message-opaque-' + layout);
+        }
+        island.handleAction({ action: 'dismiss-all' });
+        await pause(300);
+        if (layout === 'custom' && Math.abs(win.getOpacity() - 0.45) > 0.02) return false;
+      }
+      return true;
+    } finally {
+      island.setAppearance(appearance);
+      saveConfig({ islandLayout: fixture });
+      island.syncCustomLayout();
+    }
+  });
   await check('关闭常驻并选择经典岛后恢复原有隐藏方式', async () => {
     island.setClassState({ inClass: false, currentPeriodEnd: null, week: 1 });
     saveConfig({ islandLayout: defaultIslandLayouts() });
diff --git a/packages/desktop-client/src/main/smoke.ts b/packages/desktop-client/src/main/smoke.ts
index 2f31263..3f5e2c6 100644
--- a/packages/desktop-client/src/main/smoke.ts
+++ b/packages/desktop-client/src/main/smoke.ts
@@ -2161,7 +2161,7 @@ async function runIslandChecks(
     }
     return count;
   };
-  const collapseResidue = { shots: 0, max: 0 };
+  const collapseResidue = { shots: 0, stableShots: 0, max: 0 };
   await islandWindow?.webContents.executeJavaScript(
     `(() => {
        const button = document.querySelector('.island-card.expanded .icon-btn');
@@ -2170,23 +2170,46 @@ async function runIslandChecks(
      })()`,
   );
   for (let attempt = 0; attempt < 22; attempt += 1) {
+    const before = await readIslandGeometryFrom(islandWindow!);
     const image = await grabScreen();
     const geometry = await readIslandGeometryFrom(islandWindow!);
-    if (image && geometry) {
+    if (image && geometry && before) {
       collapseResidue.shots += 1;
+      // desktopCapturer 返回采样期间的帧；后读 DOM 已可能收拢，不能把合法的上一动画帧算作残影。
+      // 动画期间排除前后矩形的并集；仍要求至少四张稳态帧，稳态只排除当前岛体。
+      const left = Math.min(before.island.x, geometry.island.x);
+      const top = Math.min(before.island.y, geometry.island.y);
+      const right = Math.max(
+        before.island.x + before.island.width,
+        geometry.island.x + geometry.island.width,
+      );
+      const bottom = Math.max(
+        before.island.y + before.island.height,
+        geometry.island.y + geometry.island.height,
+      );
+      if (
+        Math.abs(before.island.width - geometry.island.width) < 1 &&
+        Math.abs(before.island.height - geometry.island.height) < 1
+      )
+        collapseResidue.stableShots += 1;
       const bitmap = image.toBitmap();
       const shotScale = image.getSize().width / Math.max(1, displayForCollapse.size.width);
       collapseResidue.max = Math.max(
         collapseResidue.max,
-        ringResidue(bitmap, shotScale, geometry.island, geometry.window),
+        ringResidue(
+          bitmap,
+          shotScale,
+          { x: left, y: top, width: right - left, height: bottom - top },
+          geometry.window,
+        ),
       );
     }
     await sleep(30);
   }
   record(
     '触摸模式收起：窗口带内不出现残影（垫底板逐帧检查，窗口让出的区域不留上一帧）',
-    collapseResidue.shots >= 4 && collapseResidue.max <= 400,
-    `${collapseResidue.shots} 帧采样，窗口带内岛像素峰值=${collapseResidue.max}（该带本该全是底板色）`,
+    collapseResidue.stableShots >= 4 && collapseResidue.max <= 400,
+    `${collapseResidue.shots} 帧采样（稳态 ${collapseResidue.stableShots} 帧），窗口带内岛像素峰值=${collapseResidue.max}（该带本该全是底板色）`,
   );
   island.setTouchMode(false);
   await sleep(200);
@@ -3269,8 +3292,8 @@ async function runIslandChecks(
   await sleep(400);
   const opacityActual = islandWindow?.getOpacity() ?? -1;
   record(
-    '个性设置：透明度生效（窗口 setOpacity）',
-    Math.abs(opacityActual - 0.62) < 0.03,
+    '消息展示时保持不透明，同时保留用户透明度设置',
+    Math.abs(opacityActual - 1) < 0.03 && island.getAppearance().opacity === 0.62,
     `设置=0.62 实际=${opacityActual.toFixed(2)}`,
   );
 
diff --git a/packages/desktop-client/src/preload/index.ts b/packages/desktop-client/src/preload/index.ts
index 54d9f5d..c816c5a 100644
--- a/packages/desktop-client/src/preload/index.ts
+++ b/packages/desktop-client/src/preload/index.ts
@@ -21,6 +21,11 @@ import type { IslandNotification, UpdateInfo } from '@classhelper/shared';
  */
 const bridge: DesktopBridge = {
   islandEditLayout: () => ipcRenderer.invoke('island:edit-layout'),
+  onIslandEditorOpen: (handler) => {
+    const listener = () => handler();
+    ipcRenderer.on('island:open-editor', listener);
+    return () => ipcRenderer.removeListener('island:open-editor', listener);
+  },
   smokeTest: process.env.ELECTRON_SMOKE_TEST === '1',
   // 冒烟凭据：只在冒烟模式下透传，供渲染进程的冒烟钩子构造测试数据用。
   // **不走代码字面量**——本文件与渲染产物都会进 app.asar，写死账号等于随安装包把教师口令发出去。
diff --git a/packages/desktop-client/src/renderer/cache/self-test.ts b/packages/desktop-client/src/renderer/cache/self-test.ts
index 3cf45fd..229e19c 100644
--- a/packages/desktop-client/src/renderer/cache/self-test.ts
+++ b/packages/desktop-client/src/renderer/cache/self-test.ts
@@ -1303,9 +1303,48 @@ export async function islandScheduleSyncSelfTest(): Promise<SmokeCheckResult> {
   }
 }
 
+let restoreIslandEditorSmoke: (() => Promise<void>) | undefined;
+/** 主窗口内编辑器验收使用纯本地 API 替身，结束后恢复登录态、路由与方法。 */
+async function islandEditorSmoke(open: boolean): Promise<void> {
+  if (!open) {
+    await restoreIslandEditorSmoke?.();
+    restoreIslandEditorSmoke = undefined;
+    return;
+  }
+  const [{ api }, { useAuthStore }, { router }] = await Promise.all([
+    import('../api/http.js'),
+    import('../stores/auth.js'),
+    import('../router/index.js'),
+  ]);
+  const auth = useAuthStore(),
+    token = auth.token,
+    path = router.currentRoute.value.fullPath,
+    originalGet = api.get;
+  const onboardingDone = (await window.desktop!.getConfig()).onboardingDone;
+  await window.desktop!.saveConfig({ onboardingDone: true });
+  api.get = (async (url: string) => {
+    if (url.includes('unread-count')) return { count: 0 };
+    if (url.includes('active-week')) return { days: [] };
+    if (url.includes('term')) return { currentWeek: 1, maxWeek: 40 };
+    return [];
+  }) as typeof api.get;
+  auth.applyToken('local-editor-smoke');
+  const { useOnboardingStore } = await import('../stores/onboarding.js');
+  useOnboardingStore().close();
+  restoreIslandEditorSmoke = async () => {
+    await router.push('/login');
+    auth.applyToken(token);
+    await router.push(path);
+    api.get = originalGet;
+    await window.desktop!.saveConfig({ onboardingDone });
+  };
+  await router.push('/settings/island/editor');
+}
+
 /** 注册到 window，供主进程冒烟脚本调用 */
 export function registerSmokeHooks(): void {
   window.__classhelperSmoke__ = {
+    islandEditorSmoke,
     islandScheduleSyncSelfTest,
     cacheSelfTest,
     cacheIsolationSelfTest,
diff --git a/packages/desktop-client/src/renderer/layouts/ClientLayout.vue b/packages/desktop-client/src/renderer/layouts/ClientLayout.vue
index 925f1b3..58e5709 100644
--- a/packages/desktop-client/src/renderer/layouts/ClientLayout.vue
+++ b/packages/desktop-client/src/renderer/layouts/ClientLayout.vue
@@ -20,6 +20,10 @@ const auth = useAuthStore();
 const realtime = useRealtimeStore();
 const notifications = useNotificationStore();
 const ui = useUiStore();
+const stopEditorNavigation = window.desktop?.onIslandEditorOpen(
+  () => void router.push('/settings/island/editor'),
+);
+onUnmounted(() => stopEditorNavigation?.());
 
 /**
  * 主侧边栏。
diff --git a/packages/desktop-client/src/renderer/router/index.ts b/packages/desktop-client/src/renderer/router/index.ts
index 4c961f2..e12a052 100644
--- a/packages/desktop-client/src/renderer/router/index.ts
+++ b/packages/desktop-client/src/renderer/router/index.ts
@@ -65,6 +65,12 @@ const routes: RouteRecordRaw[] = [
         component: () => import('../views/settings/IslandSettingsView.vue'),
         meta: { title: '灵动岛' },
       },
+      {
+        path: 'settings/island/editor',
+        name: 'settings-island-editor',
+        component: () => import('../views/settings/IslandEditorView.vue'),
+        meta: { title: '自定义灵动岛' },
+      },
       {
         path: 'settings/reminder',
         name: 'settings-reminder',
diff --git a/packages/desktop-client/src/renderer/views/settings/IslandEditorView.vue b/packages/desktop-client/src/renderer/views/settings/IslandEditorView.vue
new file mode 100644
index 0000000..eec74ec
--- /dev/null
+++ b/packages/desktop-client/src/renderer/views/settings/IslandEditorView.vue
@@ -0,0 +1,127 @@
+<script setup lang="ts">
+import { onMounted, onUnmounted, ref } from 'vue';
+import { useRouter } from 'vue-router';
+import {
+  defaultIslandLayouts,
+  DEFAULT_ISLAND_APPEARANCE,
+  type IslandState,
+  type IslandAppearance,
+} from '@classhelper/shared';
+import CustomIsland from '../../../island/CustomIsland.vue';
+import { getIslandSchedules } from '../../island/bridge.js';
+const router = useRouter();
+const settings = ref(defaultIslandLayouts());
+const appearance = ref<IslandAppearance>({ ...DEFAULT_ISLAND_APPEARANCE });
+const schedules = ref(getIslandSchedules());
+const state = ref<IslandState>({
+  mode: 'hidden',
+  active: null,
+  queued: [],
+  inClass: false,
+  currentPeriodEnd: null,
+  reason: null,
+  listExpanded: false,
+  maxCardHeight: 1024,
+  updatedAt: 0,
+});
+const ready = ref(false);
+const error = ref('');
+let refresh: ReturnType<typeof setInterval>;
+onMounted(async () => {
+  const config = await window.desktop?.getConfig();
+  if (config) {
+    settings.value = { ...config.islandLayout, layout: 'custom', residentEnabled: true };
+    appearance.value = config.island;
+    await window.desktop?.saveConfig({ islandLayout: JSON.parse(JSON.stringify(settings.value)) });
+  }
+  ready.value = true;
+  refresh = setInterval(() => {
+    schedules.value = getIslandSchedules();
+  }, 1000);
+});
+onUnmounted(() => clearInterval(refresh));
+// 保存按顺序发送；快速拖动不会让较早的响应覆盖较新的草稿。
+let saving = Promise.resolve();
+function save(value: typeof settings.value) {
+  settings.value = value;
+  const snapshot = JSON.parse(JSON.stringify(value));
+  saving = saving
+    .then(async () => {
+      await window.desktop?.saveConfig({ islandLayout: snapshot });
+      error.value = '';
+    })
+    .catch(() => {
+      error.value = '保存失败，请重试';
+    });
+}
+async function done() {
+  await saving;
+  if (!error.value) await router.push('/settings/island');
+}
+</script>
+<template>
+  <section class="island-editor-page" aria-label="自定义灵动岛编辑器">
+    <p v-if="error" role="alert">{{ error }}</p>
+    <CustomIsland
+      v-if="ready"
+      :settings="settings"
+      :appearance="appearance"
+      :schedules="schedules"
+      :state="state"
+      editing
+      embedded
+      @save="save"
+      @done="done"
+    />
+  </section>
+</template>
+<style>
+.island-editor-page {
+  height: 100%;
+  min-height: 430px;
+  min-width: 0;
+  display: flex;
+  flex-direction: column;
+}
+.island-editor-page .layout-editor {
+  position: relative;
+  inset: auto;
+  flex: 1;
+  min-height: 430px;
+  width: 100%;
+  border-radius: 0;
+  box-shadow: none;
+  grid-template-columns: 160px minmax(200px, 1fr) 248px;
+  grid-template-rows: 64px minmax(0, 1fr);
+}
+.island-editor-page .layout-editor .canvas {
+  padding: 110px 16px 80px;
+}
+.island-editor-page .layout-editor .library,
+.island-editor-page .layout-editor .settings {
+  min-height: 0;
+  padding: 14px 12px;
+}
+.island-editor-page .layout-editor .editor-header {
+  padding: 10px 14px;
+  gap: 12px;
+}
+.island-editor-page .layout-editor .editor-title p,
+.island-editor-page .layout-editor .save-state {
+  display: none;
+}
+.island-editor-page .layout-editor .scheme-picker {
+  margin-left: auto;
+}
+@media (max-width: 1100px) {
+  .island-editor-page .layout-editor {
+    grid-template-columns: 130px minmax(140px, 1fr) 220px;
+  }
+  .island-editor-page .layout-editor .component-grid {
+    grid-template-columns: 1fr;
+  }
+  .island-editor-page .layout-editor .scheme-picker > span {
+    display: none;
+  }
+}
+</style>
diff --git a/packages/desktop-client/src/renderer/views/settings/IslandSettingsView.vue b/packages/desktop-client/src/renderer/views/settings/IslandSettingsView.vue
index cd2b321..27356a2 100644
--- a/packages/desktop-client/src/renderer/views/settings/IslandSettingsView.vue
+++ b/packages/desktop-client/src/renderer/views/settings/IslandSettingsView.vue
@@ -2,6 +2,7 @@
 import { confirmAction } from '../../composables/confirm.js';
 import { computed, onMounted, onUnmounted, ref } from 'vue';
 import { ElMessage } from 'element-plus';
+import { useRouter } from 'vue-router';
 import {
   DEFAULT_ISLAND_APPEARANCE,
   ISLAND_APPEARANCE_RANGES as RANGES,
@@ -23,9 +24,10 @@ import {
  */
 const island = ref<IslandAppearance>({ ...DEFAULT_ISLAND_APPEARANCE });
 const savingIsland = ref(false);
+const router = useRouter();
 function editLayout() {
   layoutMode.value = 'custom';
-  void window.desktop?.islandEditLayout();
+  void router.push('/settings/island/editor');
 }
 const layoutMode = ref<'fixed' | 'custom'>('fixed');
 const residentEnabled = ref(false);
@@ -161,7 +163,7 @@ onMounted(async () => {
           @click="chooseLayout('fixed')"
         >
           <strong>经典灵动岛</strong>
-          <span>有消息时展开，保持熟悉的提醒样式</span>
+          <span>显示课程进度、上下课提醒与班级消息</span>
         </button>
         <button
           class="layout-choice"
@@ -208,7 +210,7 @@ onMounted(async () => {
       </template>
       <p class="text-muted">紧急消息立即展开；课中普通通知暂存，下课后展开。自定义岛可点击铃铛主动查看。</p>
       <p class="text-muted">
-        上课前 60 秒显示准备提醒和倒计时，上下课时提示课程状态；课程时间显示在名称右侧。
+        课前提示与倒计时、课中进度、即将下课倒数及上下课提醒，可在「提醒」页分别设置。课程时间显示在名称右侧。
       </p>
       <el-form label-width="110px" label-position="left">
         <el-form-item :label="`${layoutMode === 'custom' ? '通知高度' : '高度'} ${island.height}px`">
diff --git a/packages/desktop-client/src/renderer/views/settings/ReminderSettingsView.vue b/packages/desktop-client/src/renderer/views/settings/ReminderSettingsView.vue
index 61b7d53..de4b4c6 100644
--- a/packages/desktop-client/src/renderer/views/settings/ReminderSettingsView.vue
+++ b/packages/desktop-client/src/renderer/views/settings/ReminderSettingsView.vue
@@ -2,7 +2,26 @@
 import { onMounted, ref } from 'vue';
 import { classGradeQueryApi } from '../../api/index.js';
 import { useAuthStore } from '../../stores/auth.js';
+import { DEFAULT_LESSON_REMINDERS, type LessonReminderSettings } from '@classhelper/shared';
+import { ElMessage } from 'element-plus';
 const auth = useAuthStore();
+const lesson = ref({ ...DEFAULT_LESSON_REMINDERS });
+onMounted(async () => {
+  const config = await window.desktop?.getConfig();
+  if (config) lesson.value = { ...config.islandLayout.lessonReminders };
+});
+async function saveLesson(patch: Partial<LessonReminderSettings>) {
+  lesson.value = { ...lesson.value, ...patch };
+  const config = await window.desktop?.getConfig();
+  if (!config) return;
+  try {
+    await window.desktop?.saveConfig({
+      islandLayout: { ...config.islandLayout, lessonReminders: { ...lesson.value } },
+    });
+  } catch {
+    ElMessage.error('提醒设置保存失败');
+  }
+}
 /* ------------------------------------------------------------ 班级端成绩查询状态（只读）
  *
  * 「是否允许班级端查看成绩」是**服务端口径**：管理员在 Web 端「班级管理」里开关，
@@ -34,7 +53,51 @@ onMounted(loadGradeQuery);
       </div>
     </div>
 
-    <el-card shadow="never">
+    <el-card shadow="never" class="lesson-channel-settings">
+      <template #header>上下课提醒</template>
+      <p class="text-muted">
+        沿用 ClassIsland 的遮罩、课前倒计时、上下课提示及下节课预告；课中显示课程进度，临近下课显示倒数。
+      </p>
+      <div
+        v-for="channel in [
+          { key: 'prepareEnabled', title: '准备上课提醒' },
+          { key: 'onClassEnabled', title: '上课提醒' },
+          { key: 'endingEnabled', title: '即将下课倒数' },
+          { key: 'classProgressEnabled', title: '经典岛课中常显课程进度' },
+          { key: 'breakEnabled', title: '下课提醒与下节课预告' },
+        ] as const"
+        :key="channel.key"
+        class="lesson-setting-row"
+      >
+        <span>{{ channel.title }}</span>
+        <el-switch
+          :model-value="lesson[channel.key]"
+          :aria-label="channel.title"
+          @change="(v: boolean | string | number) => saveLesson({ [channel.key]: v === true })"
+        />
+      </div>
+      <div class="lesson-setting-row">
+        <span>课前提前（秒）</span>
+        <el-input-number
+          :model-value="lesson.prepareSeconds"
+          :min="5"
+          :max="1800"
+          :step="5"
+          @change="(v: number | undefined) => saveLesson({ prepareSeconds: v ?? 60 })"
+        />
+      </div>
+      <div class="lesson-setting-row">
+        <span>下课倒数提前（秒）</span>
+        <el-input-number
+          :model-value="lesson.endingSeconds"
+          :min="5"
+          :max="600"
+          :step="5"
+          @change="(v: number | undefined) => saveLesson({ endingSeconds: v ?? 60 })"
+        />
+      </div>
+    </el-card>
+    <el-card shadow="never" class="mt-16">
       <template #header>通知提醒</template>
       <p class="text-muted">
         通知与叫人通过 ClassHelper 客户端和灵动岛提醒。普通通知在上课期间暂存，下课后补弹；紧急通知立即提醒。
@@ -62,6 +125,17 @@ onMounted(loadGradeQuery);
 </template>
 
 <style scoped>
+.lesson-setting-row {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 24px;
+  padding: 12px 0;
+  border-bottom: 1px solid var(--ch-border);
+}
+.lesson-setting-row:last-child {
+  border-bottom: 0;
+}
 .channel-group {
   display: flex;
   flex-direction: column;
diff --git a/packages/desktop-client/src/types/desktop.d.ts b/packages/desktop-client/src/types/desktop.d.ts
index 38918ac..545fc73 100644
--- a/packages/desktop-client/src/types/desktop.d.ts
+++ b/packages/desktop-client/src/types/desktop.d.ts
@@ -118,6 +118,7 @@ export interface IslandClassStatePayload {
 
 export interface DesktopBridge {
   islandEditLayout(): Promise<void>;
+  onIslandEditorOpen(handler: () => void): () => void;
   getUpdateProgress(): Promise<ContractReleaseProgressDto>;
   onUpdateProgress(handler: (progress: ContractReleaseProgressDto) => void): () => void;
   /** 是否处于冒烟验证模式（由 ELECTRON_SMOKE_TEST=1 触发），同步可读 */
@@ -253,6 +254,7 @@ declare global {
     island?: IslandRendererBridge;
     /** 冒烟验证钩子，仅在 ELECTRON_SMOKE_TEST=1 时由渲染进程注册 */
     __classhelperSmoke__?: {
+      islandEditorSmoke(open: boolean): Promise<void>;
       islandScheduleSyncSelfTest(): Promise<{ ok: boolean; detail: string }>;
       cacheSelfTest(): Promise<{ ok: boolean; detail: string }>;
       cacheIsolationSelfTest(): Promise<{ ok: boolean; detail: string }>;
diff --git a/packages/shared/src/island-layout.ts b/packages/shared/src/island-layout.ts
index cb485a6..9145915 100644
--- a/packages/shared/src/island-layout.ts
+++ b/packages/shared/src/island-layout.ts
@@ -71,10 +71,11 @@ export interface IslandComponentNode {
     template: boolean;
     hour12: boolean;
     seconds: boolean;
-    target: 'next' | 'school';
+    target: 'auto' | 'next' | 'end' | 'school';
     display: 'current' | 'next' | 'today';
     count: number;
     showPeriod: boolean;
+    showProgress: boolean;
     direction: 'horizontal' | 'vertical';
     gap: number;
     interval: number;
@@ -116,9 +117,29 @@ export interface IslandLayoutSettings {
   residentEnabled: boolean;
   pointerFadeEnabled: boolean;
   pointerFadeReversed: boolean;
+  lessonReminders: LessonReminderSettings;
   activeSchemeId: string;
   schemes: IslandLayoutScheme[];
 }
+/** 上下课通道独立开关；倒数阈值以秒计，配置随本机方案保存。 */
+export interface LessonReminderSettings {
+  prepareEnabled: boolean;
+  onClassEnabled: boolean;
+  breakEnabled: boolean;
+  endingEnabled: boolean;
+  classProgressEnabled: boolean;
+  prepareSeconds: number;
+  endingSeconds: number;
+}
+export const DEFAULT_LESSON_REMINDERS: LessonReminderSettings = {
+  prepareEnabled: true,
+  onClassEnabled: true,
+  breakEnabled: true,
+  endingEnabled: true,
+  classProgressEnabled: true,
+  prepareSeconds: 60,
+  endingSeconds: 60,
+};
 function defaultExpandedRows(): IslandLayoutRow[] {
   const course = islandNode('schedule', 'expanded-schedule');
   course.settings.display = 'today';
@@ -143,10 +164,11 @@ export function islandNode(kind: IslandComponentKind, id: string): IslandCompone
       template: false,
       hour12: false,
       seconds: true,
-      target: 'next',
+      target: 'auto',
       display: 'current',
       count: 5,
       showPeriod: true,
+      showProgress: true,
       direction: 'horizontal',
       gap: 8,
       interval: 5,
@@ -177,6 +199,7 @@ export function defaultIslandLayouts(): IslandLayoutSettings {
     residentEnabled: false,
     pointerFadeEnabled: true,
     pointerFadeReversed: false,
+    lessonReminders: { ...DEFAULT_LESSON_REMINDERS },
     activeSchemeId: 'default',
     schemes: [
       {
@@ -237,10 +260,11 @@ export function normalizeIslandLayouts(input: unknown): IslandLayoutSettings {
         template: s.template === true,
         hour12: s.hour12 === true,
         seconds: s.seconds !== false,
-        target: s.target === 'school' ? 'school' : 'next',
+        target: ['auto', 'next', 'end', 'school'].includes(s.target) ? s.target : 'auto',
         display: ['current', 'next', 'today'].includes(s.display) ? s.display : 'current',
         count: clamp(s.count, 1, 40, 5),
         showPeriod: s.showPeriod !== false,
+        showProgress: s.showProgress !== false,
         direction: s.direction === 'vertical' ? 'vertical' : 'horizontal',
         gap: clamp(s.gap, 0, 64, 8),
         interval: clamp(s.interval, 1, 300, 5),
@@ -331,6 +355,15 @@ export function normalizeIslandLayouts(input: unknown): IslandLayoutSettings {
     residentEnabled: raw.layout === 'custom',
     pointerFadeEnabled: raw.pointerFadeEnabled !== false,
     pointerFadeReversed: raw.pointerFadeReversed === true,
+    lessonReminders: {
+      prepareEnabled: raw.lessonReminders?.prepareEnabled !== false,
+      onClassEnabled: raw.lessonReminders?.onClassEnabled !== false,
+      breakEnabled: raw.lessonReminders?.breakEnabled !== false,
+      endingEnabled: raw.lessonReminders?.endingEnabled !== false,
+      classProgressEnabled: raw.lessonReminders?.classProgressEnabled !== false,
+      prepareSeconds: clamp(raw.lessonReminders?.prepareSeconds, 5, 1800, 60),
+      endingSeconds: clamp(raw.lessonReminders?.endingSeconds, 5, 600, 60),
+    },
     schemes: schemes.length ? schemes : fallback.schemes,
     activeSchemeId: schemes.some((s) => s.id === raw.activeSchemeId)
       ? raw.activeSchemeId
diff --git a/packages/shared/src/types.ts b/packages/shared/src/types.ts
index 841d264..d2b67b2 100644
--- a/packages/shared/src/types.ts
+++ b/packages/shared/src/types.ts
@@ -1073,7 +1073,7 @@ export type IslandNotificationKind = 'notification' | 'homework' | 'call';
 /** 本机课表产生的临时提醒，不进入教师通知队列或已读记录。 */
 export interface IslandLessonReminder {
   id: string;
-  kind: 'prepare' | 'on-class' | 'break';
+  kind: 'prepare' | 'on-class' | 'break' | 'ending' | 'in-class';
   courseName: string;
   startTime: string;
   endTime: string;
@@ -1081,6 +1081,7 @@ export interface IslandLessonReminder {
   maskUntil: number;
   endsAt: number;
   lessonStartsAt: number;
+  lessonEndsAt?: number;
   nextCourseName?: string;
   nextStartTime?: string;
   nextEndTime?: string;
diff --git a/packages/web-admin/src/components/ManagementMenu.vue b/packages/web-admin/src/components/ManagementMenu.vue
new file mode 100644
index 0000000..5d9a226
--- /dev/null
+++ b/packages/web-admin/src/components/ManagementMenu.vue
@@ -0,0 +1,111 @@
+<script setup lang="ts">
+import { nextTick, ref, watch } from 'vue';
+import type { MenuInstance } from 'element-plus';
+import type { ManagementMenuGroup } from '@/config/navigation';
+const props = defineProps<{ groups: ManagementMenuGroup[]; active: string; collapsed?: boolean }>();
+const emit = defineEmits<{ select: [path: string]; expand: [] }>();
+const menu = ref<MenuInstance>();
+watch(
+  () => [props.active, props.groups],
+  async () => {
+    await nextTick();
+    const group = props.groups.find((g) => g.items.some((i) => i.path === props.active));
+    if (group) menu.value?.open(group.id);
+  },
+  { immediate: true },
+);
+</script>
+<template>
+  <el-menu
+    ref="menu"
+    :default-active="active"
+    :default-openeds="groups.filter((g) => g.items.some((i) => i.path === active)).map((g) => g.id)"
+    class="layout-menu management-menu"
+    :class="{ 'menu-rail': collapsed }"
+    unique-opened
+    @select="emit('select', $event)"
+  >
+    <el-sub-menu v-for="group in groups" :key="group.id" :index="group.id">
+      <template #title>
+        <div
+          class="management-group-title"
+          :title="collapsed ? group.title : undefined"
+          @click="collapsed && emit('expand')"
+        >
+          <el-icon><component :is="group.icon" /></el-icon>
+          <span>{{ group.title }}</span>
+        </div>
+      </template>
+      <el-menu-item v-for="item in group.items" :key="item.path" :index="item.path" :data-path="item.path">
+        <el-icon><component :is="item.icon" /></el-icon>
+        <span>{{ item.title }}</span>
+      </el-menu-item>
+    </el-sub-menu>
+  </el-menu>
+</template>
+<style scoped>
+.management-menu.layout-menu {
+  --el-menu-text-color: var(--ch-text-secondary);
+  --el-menu-active-color: var(--el-color-primary);
+  --el-menu-hover-bg-color: var(--ch-surface-alt);
+  background: transparent;
+  border: 0;
+  flex: 1;
+  min-height: 0;
+  overflow: auto;
+  padding: 12px 8px;
+}
+.management-group-title {
+  display: flex;
+  align-items: center;
+  gap: 10px;
+  width: 100%;
+  height: 100%;
+  overflow: hidden;
+}
+.management-group-title .el-icon {
+  flex: 0 0 20px;
+  margin: 0;
+}
+.management-menu :deep(.el-sub-menu__title) {
+  padding: 0 14px;
+  height: 46px;
+  margin-bottom: 4px;
+  border-radius: 10px;
+  color: var(--ch-text-secondary);
+  font-weight: 600;
+}
+.management-menu :deep(.el-sub-menu.is-active > .el-sub-menu__title) {
+  color: var(--el-color-primary);
+}
+.management-menu :deep(.el-menu) {
+  background: transparent;
+}
+.management-menu :deep(.el-menu-item) {
+  height: 42px;
+  padding-left: 26px;
+  margin: 3px 0 3px 10px;
+  border-radius: 8px;
+  min-width: 0;
+  color: var(--ch-text-secondary);
+}
+.management-menu.layout-menu :deep(.el-menu-item.is-active) {
+  background: var(--el-color-primary-light-9);
+  color: var(--el-color-primary);
+  font-weight: 600;
+}
+.management-menu.menu-rail :deep(.el-sub-menu > .el-menu) {
+  display: none;
+}
+.management-menu.menu-rail :deep(.el-sub-menu__icon-arrow),
+.management-menu.menu-rail .management-group-title span {
+  opacity: 0;
+  width: 0;
+}
+.management-menu.menu-rail :deep(.el-sub-menu__title) {
+  padding: 0 14px !important;
+}
+.management-menu.menu-rail {
+  overflow-x: hidden;
+}
+</style>
diff --git a/packages/web-admin/src/config/navigation.ts b/packages/web-admin/src/config/navigation.ts
new file mode 100644
index 0000000..3b3151f
--- /dev/null
+++ b/packages/web-admin/src/config/navigation.ts
@@ -0,0 +1,34 @@
+/** 只定义分组；子页标题、图标和权限直接读取路由，避免菜单与路由各维护一套权限。 */
+export const MANAGEMENT_GROUPS = [
+  { id: 'workspace', title: '工作台', icon: 'Odometer', paths: ['/dashboard', '/assistant'] },
+  {
+    id: 'teaching',
+    title: '教学事务',
+    icon: 'Notebook',
+    paths: ['/schedules', '/plan-editor', '/homeworks', '/notifications', '/grades'],
+  },
+  {
+    id: 'school',
+    title: '班级与人员',
+    icon: 'School',
+    paths: ['/classes', '/students', '/teachers', '/roster', '/term-weeks', '/archives'],
+  },
+  { id: 'devices', title: '设备运维', icon: 'Monitor', paths: ['/clients'] },
+  {
+    id: 'system',
+    title: '系统管理',
+    icon: 'Setting',
+    paths: ['/permissions', '/system-settings', '/ai-settings', '/database'],
+  },
+] as const;
+export interface ManagementMenuItem {
+  path: string;
+  title: string;
+  icon: string;
+}
+export interface ManagementMenuGroup {
+  id: string;
+  title: string;
+  icon: string;
+  items: ManagementMenuItem[];
+}
diff --git a/packages/web-admin/src/layouts/AdminLayout.vue b/packages/web-admin/src/layouts/AdminLayout.vue
index f5db869..44af606 100644
--- a/packages/web-admin/src/layouts/AdminLayout.vue
+++ b/packages/web-admin/src/layouts/AdminLayout.vue
@@ -1,9 +1,11 @@
 <script setup lang="ts">
-import { computed, nextTick, onMounted, onUnmounted, reactive, ref, watch } from 'vue';
+import { computed, onMounted, onUnmounted, reactive, ref, watch } from 'vue';
 import { useRoute, useRouter } from 'vue-router';
 import { ElMessage, ElMessageBox, type FormInstance, type FormRules } from 'element-plus';
-import { STORAGE_KEYS, type PermissionKey, type UserRole } from '@classhelper/shared';
+import { STORAGE_KEYS, type PermissionKey } from '@classhelper/shared';
 import { authApi } from '@/api';
+import ManagementMenu from '@/components/ManagementMenu.vue';
+import { MANAGEMENT_GROUPS, type ManagementMenuItem } from '@/config/navigation';
 import UpdateCheckDialog from '@/components/UpdateCheckDialog.vue';
 import { useAuthStore } from '@/stores/auth';
 import { useRealtimeStore } from '@/stores/realtime';
@@ -87,90 +89,72 @@ function openAssistant(): void {
  *   （`permission:manage` / `client:manage`）—— 教师被某个权限组授予它之后同样该看见
  *   （见 `visibleMenuItems`）
  */
-interface MenuItem {
-  path: string;
-  title: string;
-  icon: string;
-  roles: UserRole[];
-  /** 可选的**生效权限**门控：有值时还要 `auth.can()` 通过才显示（角色判不出来这一层） */
-  permission?: PermissionKey;
-}
-
-const menuItems: MenuItem[] = [
-  {
-    path: '/plan-editor',
-    title: '时间表与课表编辑',
-    icon: 'Calendar',
-    roles: ['ADMIN', 'TEACHER'],
-    permission: 'schedule:read',
-  },
-  { path: '/roster', title: '学生名单', icon: 'User', roles: ['TEACHER'], permission: 'roster:read' },
-  {
-    path: '/system-settings',
-    title: '系统设置',
-    icon: 'Setting',
-    roles: ['ADMIN', 'TEACHER'],
-    permission: 'system:manage',
-  },
-  { path: '/dashboard', title: '仪表盘', icon: 'Odometer', roles: ['ADMIN', 'TEACHER'] },
-  { path: '/classes', title: '班级管理', icon: 'School', roles: ['ADMIN'] },
-  { path: '/students', title: '学生管理', icon: 'User', roles: ['ADMIN'] },
-  { path: '/teachers', title: '教师管理', icon: 'UserFilled', roles: ['ADMIN'] },
-  { path: '/term-weeks', title: '学期周次', icon: 'Calendar', roles: ['ADMIN'] },
-  { path: '/archives', title: '毕业归档', icon: 'FolderOpened', roles: ['ADMIN'] },
-  {
-    path: '/permissions',
-    title: '权限组',
-    icon: 'Lock',
-    roles: ['ADMIN', 'TEACHER'],
-    permission: 'permission:manage',
-  },
-  { path: '/schedules', title: '课表管理', icon: 'Calendar', roles: ['ADMIN', 'TEACHER'] },
-  { path: '/homeworks', title: '作业发布', icon: 'Notebook', roles: ['ADMIN', 'TEACHER'] },
-  { path: '/notifications', title: '通知发布', icon: 'Bell', roles: ['ADMIN', 'TEACHER'] },
-  { path: '/grades', title: '成绩录入', icon: 'Trophy', roles: ['ADMIN', 'TEACHER'] },
-  {
-    path: '/assistant',
-    title: 'AI 助手',
-    icon: 'MagicStick',
-    // `ai:use` 默认给 ADMIN + TEACHER（教师用一句话发布作业/通知/叫人），
-    // 但仍走**生效权限**细筛：管理员把 ai:use 从某个权限组收回后这里就该消失。
-    roles: ['ADMIN', 'TEACHER'],
-    permission: 'ai:use',
-  },
-  {
-    path: '/clients',
-    title: '客户端',
-    icon: 'Monitor',
-    // 按生效权限展示入口；页内分别校验设备管理、远控和更新权限。
-    roles: ['ADMIN', 'TEACHER'],
-    permission: 'client:read',
-  },
-  {
-    path: '/ai-settings',
-    title: '大模型设置',
-    icon: 'Setting',
-    // 与「权限组」「客户端设备」同一道门控：只有 ai:manage（默认仅管理员）才看得见，
-    // 页面里的配置读写也要求它（教师访问会 403）。
-    roles: ['ADMIN', 'TEACHER'],
-    permission: 'ai:manage',
-  },
-  { path: '/database', title: '数据库管理', icon: 'Coin', roles: ['ADMIN'] },
-];
-
-/**
- * 当前账号可见的菜单。
- *
- * 两道筛子：`roles` 是粗筛（角色级，与后端 `requireRole` 对齐），`permission` 是细筛
- * （生效权限级）——「权限组」必须走后者：教师被权限组授予 `permission:manage` 后
- * 角色还是 TEACHER，靠 `roles` 判断不出来。所有角色都等待生效权限，加载失败时不放行。
- */
+const menuItems = router
+  .getRoutes()
+  .filter((record) => MANAGEMENT_GROUPS.some((g) => (g.paths as readonly string[]).includes(record.path)))
+  .map((record) => ({
+    path: record.path,
+    title: String(record.meta.title || record.path),
+    icon: String(record.meta.icon || 'Setting'),
+    roles: record.meta.roles as string[] | undefined,
+    permission: record.meta.permission as PermissionKey | undefined,
+  }));
 const visibleMenuItems = computed(() =>
-  menuItems.filter((item) => {
-    if (!auth.role || !item.roles.includes(auth.role)) return false;
-    return !item.permission || auth.can(item.permission);
-  }),
+  menuItems.filter(
+    (item) =>
+      !!auth.role &&
+      (!item.roles?.length || item.roles.includes(auth.role)) &&
+      (!item.permission || auth.can(item.permission)),
+  ),
 );
+const menuGroups = computed(() =>
+  MANAGEMENT_GROUPS.map((group) => ({
+    ...group,
+    items: group.paths.flatMap((path) => visibleMenuItems.value.filter((item) => item.path === path)),
+  })).filter((group) => group.items.length),
+);
+const currentGroup = computed(() =>
+  menuGroups.value.find((group) => group.items.some((item) => item.path === route.path)),
+);
+const searchVisible = ref(false);
+const searchQuery = ref('');
+const searchResults = computed(() =>
+  visibleMenuItems.value.filter((item) => item.title.includes(searchQuery.value.trim())),
+);
+const tabs = ref<Array<ManagementMenuItem & { fullPath: string }>>([]);
+function addCurrentTab() {
+  const item = visibleMenuItems.value.find((item) => item.path === route.path);
+  if (!item) return;
+  const tab = tabs.value.find((tab) => tab.path === item.path);
+  if (tab) tab.fullPath = route.fullPath;
+  else tabs.value.push({ path: item.path, title: item.title, icon: item.icon, fullPath: route.fullPath });
+  tabs.value = tabs.value.filter((tab) => visibleMenuItems.value.some((item) => item.path === tab.path));
+  if (tabs.value.length > 20) tabs.value.splice(tabs.value[0]?.path === '/dashboard' ? 1 : 0, 1);
+}
+watch([() => route.fullPath, visibleMenuItems], addCurrentTab, { immediate: true });
+function closeTab(path: string) {
+  if (path === '/dashboard') return;
+  const i = tabs.value.findIndex((tab) => tab.path === path);
+  if (i < 0) return;
+  tabs.value.splice(i, 1);
+  if (route.path === path) void router.push((tabs.value[i] ?? tabs.value[i - 1])?.fullPath || '/dashboard');
+}
+function closeOtherTabs() {
+  tabs.value = tabs.value.filter((tab) => tab.path === route.path || tab.path === '/dashboard');
+}
+function searchNavigate(path: string) {
+  searchVisible.value = false;
+  searchQuery.value = '';
+  void router.push(path);
+}
+function handleSearchShortcut(event: KeyboardEvent) {
+  if ((event.ctrlKey || event.metaKey) && event.key.toLowerCase() === 'k') {
+    event.preventDefault();
+    searchVisible.value = !searchVisible.value;
+  }
+}
+onMounted(() => window.addEventListener('keydown', handleSearchShortcut));
+onUnmounted(() => window.removeEventListener('keydown', handleSearchShortcut));
 
 /** 高亮当前菜单：直接比较路由路径，避免依赖路由名 */
 const activeMenu = computed(() => route.path);
@@ -178,172 +162,10 @@ const activeMenu = computed(() => route.path);
 /** 顶栏显示的当前页面标题（小屏下替代侧边栏的"我在哪"提示，1Panel 同款做法） */
 const currentTitle = computed(() => menuItems.find((item) => item.path === route.path)?.title ?? APP_TITLE);
 
-/* -------------------------------------------------------------- 导航指示器 */
-
-/**
- * 侧栏激活项的**滑动指示器**（beUI 的 `shared-layout-bg` / tabs 的 layoutId 手法）。
- *
- * 做法是**一个**绝对定位的药丸跟着激活项平移，而不是让每个菜单项各自画一块底色。
- * 后者在切换时是"旧的瞬间消失、新的瞬间出现"，看不出两者之间的关系；
- * 前者的滑动把「我从这一项去了那一项」这个关系画了出来 —— 这是整个动效层里
- * 唯一一处"传达信息"而非"装饰"的动画。
- *
- * 位置靠**量 DOM**而不是写死数值：菜单项的位置由 Element Plus 的 padding 与行高决定，
- * 写死会在组件库升级、字号变化或菜单文案变长时错位。
- * 用 ResizeObserver 而不是 window.resize：侧栏宽度/菜单重排都可能由非窗口因素触发。
- */
-/**
- * `el-aside` 是**组件**而不是原生标签：模板 ref 拿到的是组件实例，
- * 直接 `.querySelector()` 会 `TypeError: not a function`（实测踩过，而且被
- * `app.config.errorHandler` 吞成了控制台里一行中文异常，界面看着毫无异样）。
- * 组件实例的 `$el` 才是它真正渲染出来的那个 `<aside>` 元素。
- */
-type AsideRef = { $el?: HTMLElement } | HTMLElement | null;
-const asideRef = ref<AsideRef>(null);
-
-function asideElement(): HTMLElement | null {
-  const value = asideRef.value;
-  if (!value) return null;
-  return value instanceof HTMLElement ? value : (value.$el ?? null);
-}
-
-const indicator = ref({ x: 0, y: 0, width: 0, height: 0, visible: false });
-/** 指示器的裁剪框 = 菜单**视口**（滚动容器自身），滚动时激活项滚出去就跟着被裁掉 */
-const indicatorClip = ref({ top: 0, left: 0, width: 0, height: 0 });
-
-/** 菜单滚动容器：桌面侧栏里的 .el-menu（小屏是抽屉里的另一个 el-menu，没有指示器） */
-function menuScroller(): HTMLElement | null {
-  return asideElement()?.querySelector<HTMLElement>('.layout-menu') ?? null;
-}
-
-function syncIndicator(): void {
-  const aside = asideElement();
-  const scroller = menuScroller();
-  const active = scroller?.querySelector<HTMLElement>('.el-menu-item.is-active');
-  if (!aside || !scroller || !active) {
-    indicator.value = { ...indicator.value, visible: false };
-    return;
-  }
-  const asideRect = aside.getBoundingClientRect();
-  const box = scroller.getBoundingClientRect();
-  /*
-   * 以菜单视口为基准量，而不是以整个侧栏为基准。
-   *
-   * 菜单列是可滚动的（见 .layout-menu 的 overflow）：量侧栏的话，激活项被滚出视口后
-   * 指示器会"贴"到品牌区/页脚上。裁剪框跟着菜单视口，指示器就只在菜单里可见。
-   */
-  indicatorClip.value = {
-    top: box.top - asideRect.top,
-    left: box.left - asideRect.left,
-    width: box.width,
-    height: box.height,
-  };
-  const rect = active.getBoundingClientRect();
-  indicator.value = {
-    x: rect.left - box.left,
-    y: rect.top - box.top,
-    width: rect.width,
-    height: rect.height,
-    visible: rect.width > 0 && rect.height > 0,
-  };
-}
-
-const indicatorClipStyle = computed(() => ({
-  top: `${indicatorClip.value.top}px`,
-  left: `${indicatorClip.value.left}px`,
-  width: `${indicatorClip.value.width}px`,
-  height: `${indicatorClip.value.height}px`,
-}));
-
-const indicatorStyle = computed(() => ({
-  width: `${indicator.value.width}px`,
-  height: `${indicator.value.height}px`,
-  transform: `translate(${indicator.value.x}px, ${indicator.value.y}px)`,
-  opacity: indicator.value.visible ? '1' : '0',
-}));
-
-let asideObserver: ResizeObserver | null = null;
-let indicatorFrame = 0;
-let scrollerEl: HTMLElement | null = null;
-let scrollSettleTimer = 0;
-/** 正在跟随滚动：这期间关掉过渡，否则每帧都重新起一段 397ms 的弹簧，看起来"慢吞吞地追" */
-const indicatorFollowing = ref(false);
-const SCROLL_SETTLE_MS = 140;
-
-/**
- * 把测量推迟到下一帧再跑。
- *
- * 侧栏折叠时 `.aside` 的宽度有一整段过渡，`ResizeObserver` 会逐帧回调；若在回调里**同步**
- * 读 `getBoundingClientRect()` 再写样式，就是在每一帧中间强行插入一次同步布局
- * （Chromium 还会因此报 "ResizeObserver loop completed with undelivered notifications"）。
- * 放进 rAF 就变成"本帧布局完成后统一量一次"，代价是跟随慢一帧，肉眼无感。
- */
-function scheduleIndicatorSync(): void {
-  if (indicatorFrame) return;
-  indicatorFrame = requestAnimationFrame(() => {
-    indicatorFrame = 0;
-    syncIndicator();
-  });
-}
-
-/**
- * 滚动菜单时**同步**量一次（不走 rAF 版）：滚动本身已经在合成器上跑，
- * 再隔一帧读数会看到指示器明显落后于菜单。
- */
-function handleMenuScroll(): void {
-  syncIndicator();
-  indicatorFollowing.value = true;
-  window.clearTimeout(scrollSettleTimer);
-  scrollSettleTimer = window.setTimeout(() => {
-    indicatorFollowing.value = false;
-  }, SCROLL_SETTLE_MS);
-}
-
-/** 绑定/解绑菜单滚动监听（小屏没有侧栏，切回来时要重新绑） */
-function bindMenuScroller(): void {
-  const next = menuScroller();
-  if (next === scrollerEl) return;
-  scrollerEl?.removeEventListener('scroll', handleMenuScroll);
-  scrollerEl = next;
-  scrollerEl?.addEventListener('scroll', handleMenuScroll, { passive: true });
-}
-
-/**
- * 首次测量放在 onMounted（而不是 nextTick）：子组件先于父组件挂载完成，
- * 此刻 `.el-menu-item.is-active` 已在文档里，量完再让浏览器首帧绘制 ——
- * 于是指示器**第一次出现就是正确位置**，不会从左上角滑过去。
- */
 onMounted(() => {
-  // 生效权限（`GET /permissions/me`）：菜单里的「权限组」要等它回来才显示。
-  // 失败不阻塞布局，带权限要求的入口保持关闭。
   void auth.ensurePermissions();
-  syncIndicator();
-  bindMenuScroller();
-  const aside = asideElement();
-  if (aside && typeof ResizeObserver !== 'undefined') {
-    asideObserver = new ResizeObserver(scheduleIndicatorSync);
-    asideObserver.observe(aside);
-  }
 });
 
-onUnmounted(() => {
-  if (indicatorFrame) cancelAnimationFrame(indicatorFrame);
-  indicatorFrame = 0;
-  window.clearTimeout(scrollSettleTimer);
-  scrollerEl?.removeEventListener('scroll', handleMenuScroll);
-  scrollerEl = null;
-  asideObserver?.disconnect();
-  asideObserver = null;
-});
-
-// 路由变化后菜单的 active 类由 Element Plus 更新，等一拍再量
-watch(
-  () => route.path,
-  () => {
-    void nextTick(syncIndicator);
-  },
-);
-
 /** 小屏：侧边栏收进抽屉，由顶栏汉堡按钮唤出 */
 const drawerVisible = ref(false);
 
@@ -356,11 +178,6 @@ watch(
 
 watch(isMobile, (mobile) => {
   if (!mobile) drawerVisible.value = false;
-  // 侧栏是按 v-if 挂载/卸载的：从抽屉切回常驻侧栏后，新的 .el-menu 需要重新绑滚动监听
-  void nextTick(() => {
-    syncIndicator();
-    bindMenuScroller();
-  });
 });
 
 /**
@@ -544,7 +361,6 @@ const tourSteps = computed(() => [
     <!-- 桌面/平板：常驻深色侧边栏（折叠成 64px 图标导轨，见样式里的 .ch-nav.is-collapsed） -->
     <el-aside
       v-if="!isMobile"
-      ref="asideRef"
       :width="ui.sidebarCollapsed ? 'var(--ch-aside-collapsed-width)' : 'var(--ch-aside-width)'"
       class="layout-aside ch-sidebar ch-nav"
       :class="{ 'is-collapsed': ui.sidebarCollapsed }"
@@ -554,23 +370,17 @@ const tourSteps = computed(() => [
         <img class="brand-logo" src="/logo.png" alt="" width="24" height="24" />
         <span class="brand-text">ClassHelper</span>
       </div>
-      <!-- 激活项的滑动指示器：单个药丸在菜单项之间平移，位置由 syncIndicator() 量出来。
-           外层裁剪框贴着**菜单视口**（菜单列可滚动，激活项滚出去时指示器要一起被裁掉），
-           pointer-events:none 是必需的 —— 它盖在菜单项上，否则会把点击吃掉。 -->
-      <div class="nav-indicator-clip" :style="indicatorClipStyle" aria-hidden="true">
-        <div class="nav-indicator" :class="{ 'is-following': indicatorFollowing }" :style="indicatorStyle" />
+      <ManagementMenu
+        :groups="menuGroups"
+        :active="activeMenu"
+        :collapsed="ui.sidebarCollapsed"
+        @select="handleMenuSelect"
+        @expand="ui.toggleSidebar()"
+      />
+      <div class="sidebar-foot">
+        <span class="sidebar-status-dot" />
+        <span v-if="!ui.sidebarCollapsed">{{ connectionText }}</span>
       </div>
-      <el-menu :default-active="activeMenu" class="layout-menu" @select="handleMenuSelect">
-        <el-menu-item
-          v-for="item in visibleMenuItems"
-          :key="item.path"
-          :index="item.path"
-          :title="ui.sidebarCollapsed ? item.title : undefined"
-        >
-          <el-icon><component :is="item.icon" /></el-icon>
-          <span>{{ item.title }}</span>
-        </el-menu-item>
-      </el-menu>
     </el-aside>
 
     <el-container class="layout-body">
@@ -608,7 +418,12 @@ const tourSteps = computed(() => [
               <Fold v-else />
             </el-icon>
           </button>
-          <span class="header-title">{{ isMobile ? currentTitle : APP_TITLE }}</span>
+          <span v-if="isMobile" class="header-title">{{ currentTitle }}</span>
+          <el-breadcrumb v-else class="management-breadcrumb" separator="/" aria-label="当前位置">
+            <el-breadcrumb-item :to="{ path: '/dashboard' }">首页</el-breadcrumb-item>
+            <el-breadcrumb-item v-if="currentGroup">{{ currentGroup.title }}</el-breadcrumb-item>
+            <el-breadcrumb-item>{{ currentTitle }}</el-breadcrumb-item>
+          </el-breadcrumb>
           <el-tag v-if="!isMobile" :type="connectionType" size="small" effect="light" data-tour="conn-tag">
             <span class="header-conn">{{ connectionText }}</span>
           </el-tag>
@@ -628,6 +443,11 @@ const tourSteps = computed(() => [
         </div>
 
         <div class="header-right">
+          <button class="nav-search" aria-label="搜索页面" @click="searchVisible = true">
+            <el-icon><Search /></el-icon>
+            <span v-if="!isMobile">搜索页面</span>
+            <kbd v-if="!isMobile">Ctrl K</kbd>
+          </button>
           <!--
             AI 助手快捷入口：与侧栏「AI 助手」菜单项同一道门控。
             关怀模式打开时挂 .care-emphasis（字号写在 styles/index.css 的关怀模式块里，
@@ -754,6 +574,35 @@ const tourSteps = computed(() => [
         </div>
       </el-header>
 
+      <nav class="workspace-tabs" aria-label="已打开页面">
+        <div class="workspace-tabs-scroll">
+          <div
+            v-for="tab in tabs"
+            :key="tab.path"
+            class="workspace-tab"
+            :class="{ active: route.path === tab.path }"
+          >
+            <button
+              :aria-current="route.path === tab.path ? 'page' : undefined"
+              @click="router.push(tab.fullPath)"
+            >
+              <el-icon><component :is="tab.icon" /></el-icon>
+              {{ tab.title }}
+            </button>
+            <button
+              v-if="tab.path !== '/dashboard'"
+              class="close-tab"
+              :aria-label="`关闭${tab.title}`"
+              @click="closeTab(tab.path)"
+            >
+              ×
+            </button>
+          </div>
+        </div>
+        <button class="tabs-action" title="关闭其他页签" aria-label="关闭其他页签" @click="closeOtherTabs">
+          <el-icon><FolderOpened /></el-icon>
+        </button>
+      </nav>
       <el-main class="layout-main">
         <!--
           这里**刻意不用** `<transition>` 包 router-view。
@@ -786,15 +635,33 @@ const tourSteps = computed(() => [
           <img class="brand-logo" src="/logo.png" alt="" width="24" height="24" />
           <span class="brand-text">ClassHelper</span>
         </div>
-        <el-menu :default-active="activeMenu" class="layout-menu" @select="handleMenuSelect">
-          <el-menu-item v-for="item in visibleMenuItems" :key="item.path" :index="item.path">
-            <el-icon><component :is="item.icon" /></el-icon>
-            <span>{{ item.title }}</span>
-          </el-menu-item>
-        </el-menu>
+        <ManagementMenu :groups="menuGroups" :active="activeMenu" @select="handleMenuSelect" />
       </div>
     </el-drawer>
 
+    <el-dialog
+      v-model="searchVisible"
+      title="搜索页面"
+      width="min(560px, 92vw)"
+      class="navigation-search"
+      @closed="searchQuery = ''"
+    >
+      <el-input
+        v-model="searchQuery"
+        placeholder="输入功能名称"
+        clearable
+        autofocus
+        @keydown.enter="searchResults[0] && searchNavigate(searchResults[0].path)"
+      />
+      <div class="navigation-results">
+        <button v-for="item in searchResults" :key="item.path" @click="searchNavigate(item.path)">
+          <el-icon><component :is="item.icon" /></el-icon>
+          <span>{{ item.title }}</span>
+          <small>{{ menuGroups.find((g) => g.items.some((i) => i.path === item.path))?.title }}</small>
+        </button>
+        <el-empty v-if="!searchResults.length" description="没有匹配的功能" :image-size="64" />
+      </div>
+    </el-dialog>
     <el-dialog v-model="passwordVisible" title="修改密码" width="420px">
       <el-form ref="passwordFormRef" :model="passwordForm" :rules="passwordRules" label-width="90px">
         <el-form-item label="当前密码" prop="currentPassword">
@@ -1176,3 +1043,5 @@ const tourSteps = computed(() => [
   line-height: 1.5;
 }
 </style>
+
+<style src="../styles/management-shell.css"></style>
diff --git a/packages/web-admin/src/styles/management-shell.css b/packages/web-admin/src/styles/management-shell.css
new file mode 100644
index 0000000..caf6057
--- /dev/null
+++ b/packages/web-admin/src/styles/management-shell.css
@@ -0,0 +1,276 @@
+/* 参照 art-design-pro 的留白、导航层次与工作区结构；沿用现有页面和语义主题令牌。 */
+:root {
+  --ch-aside-width: 240px;
+  --ch-bg: #f7f8fa;
+  --ch-border: #edf0f4;
+  --el-color-primary: #5d6bfa;
+  --el-color-primary-light-3: #8e98fc;
+  --el-color-primary-light-5: #aeb5fd;
+  --el-color-primary-light-7: #ced2fe;
+  --el-color-primary-light-8: #dfe2fe;
+  --el-color-primary-light-9: #eff0ff;
+  --el-color-primary-dark-2: #4a55c8;
+}
+html.dark {
+  --ch-bg: #14161a;
+  --ch-border: #2e323c;
+  --el-color-primary-light-3: #7f8afc;
+  --el-color-primary-light-5: #5963b8;
+  --el-color-primary-light-7: #3c437d;
+  --el-color-primary-light-8: #30365f;
+  --el-color-primary-light-9: #272c48;
+}
+.layout .ch-sidebar,
+.ch-sidebar-drawer.ch-sidebar {
+  background: var(--ch-surface);
+  color: var(--ch-text);
+  border-radius: 0;
+  border-right: 1px solid var(--ch-border);
+}
+.layout .brand,
+.ch-sidebar-drawer .brand {
+  height: 64px;
+  padding: 0 24px;
+  gap: 12px;
+  border-bottom: 0;
+  color: var(--ch-text);
+  letter-spacing: 0.3px;
+  flex-shrink: 0;
+}
+.layout .brand-text {
+  font-size: 18px;
+}
+.layout .layout-header {
+  height: 64px;
+  border-radius: 0;
+  box-shadow: none;
+  border-bottom: 1px solid var(--ch-border);
+  padding: 0 24px;
+}
+.layout .layout-body {
+  display: flex;
+  flex-direction: column;
+  min-height: 0;
+  overflow: hidden;
+}
+.layout .header-left {
+  flex: 1;
+}
+.management-breadcrumb {
+  min-width: 0;
+  white-space: nowrap;
+}
+.layout .header-left > .el-tag {
+  display: none;
+}
+.layout .header-right {
+  gap: 12px;
+}
+.layout .nav-toggle {
+  background: transparent;
+}
+.layout .user-chip {
+  padding: 6px 10px;
+  border-radius: 10px;
+  background: var(--ch-surface-alt);
+}
+.sidebar-foot {
+  flex-shrink: 0;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  gap: 8px;
+  height: 48px;
+  color: var(--ch-text-muted);
+  border-top: 1px solid var(--ch-border);
+  font-size: 12px;
+  white-space: nowrap;
+}
+.sidebar-status-dot {
+  width: 6px;
+  height: 6px;
+  border-radius: 50%;
+  background: var(--el-color-primary);
+}
+.nav-search {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  background: var(--ch-surface-alt);
+  border: 1px solid var(--ch-border);
+  color: var(--ch-text-muted);
+  border-radius: 8px;
+  padding: 7px 10px;
+  cursor: pointer;
+  font: inherit;
+  font-size: 12px;
+  white-space: nowrap;
+}
+.nav-search kbd {
+  font: inherit;
+  font-size: 10px;
+  border: 1px solid var(--ch-border);
+  border-radius: 4px;
+  padding: 1px 4px;
+  background: var(--ch-surface);
+}
+.workspace-tabs {
+  display: flex;
+  flex-shrink: 0;
+  height: 46px;
+  padding: 0 20px;
+  gap: 12px;
+  background: var(--ch-surface);
+  border-bottom: 1px solid var(--ch-border);
+  min-width: 0;
+}
+.workspace-tabs-scroll {
+  display: flex;
+  flex: 1;
+  align-items: stretch;
+  overflow-x: auto;
+  scrollbar-width: none;
+  min-width: 0;
+  gap: 4px;
+}
+.workspace-tab {
+  display: flex;
+  align-items: center;
+  flex-shrink: 0;
+  border-bottom: 2px solid transparent;
+  gap: 2px;
+  color: var(--ch-text-muted);
+  padding: 0 4px;
+}
+.workspace-tab.active {
+  border-bottom-color: var(--el-color-primary);
+  color: var(--el-color-primary);
+  background: var(--el-color-primary-light-9);
+}
+.workspace-tab button,
+.tabs-action {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  border: 0;
+  color: inherit;
+  background: transparent;
+  cursor: pointer;
+  font: inherit;
+  font-size: 13px;
+  padding: 8px;
+  white-space: nowrap;
+}
+.workspace-tab button.close-tab {
+  font-size: 18px;
+  padding: 2px 5px;
+  border-radius: 4px;
+}
+.workspace-tab button:hover,
+.tabs-action:hover {
+  color: var(--el-color-primary);
+}
+.tabs-action {
+  color: var(--ch-text-muted);
+}
+.layout .layout-main {
+  min-height: 0;
+}
+.layout-main .page {
+  max-width: 1800px;
+  margin: 0 auto;
+  padding: 24px;
+}
+.layout-main .page-title {
+  font-size: 22px;
+  letter-spacing: -0.4px;
+  font-weight: 600;
+}
+.layout-main .page-subtitle {
+  margin-top: 8px;
+  color: var(--ch-text-muted);
+}
+.layout-main .el-card {
+  border-radius: 12px;
+  border: 1px solid var(--ch-border);
+  box-shadow: none;
+}
+.layout-main .el-card__header {
+  padding: 18px 22px;
+  background: transparent;
+  font-weight: 600;
+  border-color: var(--ch-border);
+}
+.layout-main .el-table {
+  --el-table-header-bg-color: var(--ch-surface-alt);
+  --el-table-border-color: var(--ch-border);
+}
+.layout-main .el-table th.el-table__cell {
+  height: 46px;
+  font-weight: 500;
+  color: var(--ch-text-secondary);
+}
+.navigation-results {
+  display: flex;
+  flex-direction: column;
+  gap: 6px;
+  margin-top: 16px;
+  max-height: 50vh;
+  overflow: auto;
+}
+.navigation-results > button {
+  border: 0;
+  border-radius: 8px;
+  background: var(--ch-surface-alt);
+  padding: 12px;
+  display: flex;
+  align-items: center;
+  gap: 12px;
+  color: var(--ch-text);
+  cursor: pointer;
+  text-align: left;
+  font: inherit;
+}
+.navigation-results > button:hover {
+  background: var(--el-color-primary-light-9);
+  color: var(--el-color-primary);
+}
+.navigation-results small {
+  margin-left: auto;
+  color: var(--ch-text-muted);
+}
+.management-menu :focus-visible,
+.workspace-tabs button:focus-visible,
+.nav-search:focus-visible {
+  outline: 2px solid var(--el-color-primary);
+  outline-offset: -2px;
+}
+@media (max-width: 1100px) {
+  .nav-search > span,
+  .nav-search > kbd {
+    display: none;
+  }
+  .layout .header-right {
+    gap: 6px;
+  }
+  .management-breadcrumb .el-breadcrumb__item:nth-child(2) {
+    display: none;
+  }
+}
+@media (max-width: 768px) {
+  .layout .layout-header {
+    height: 56px;
+    padding: 0 12px;
+  }
+  .workspace-tabs {
+    height: 42px;
+    padding: 0 10px;
+  }
+  .layout-main .page {
+    padding: 16px 12px;
+  }
+  .layout .user-chip {
+    padding: 6px;
+    background: transparent;
+  }
+}
diff --git a/packages/web-admin/src/views/DashboardView.vue b/packages/web-admin/src/views/DashboardView.vue
index 36f4aad..28c8af6 100644
--- a/packages/web-admin/src/views/DashboardView.vue
+++ b/packages/web-admin/src/views/DashboardView.vue
@@ -22,6 +22,32 @@ const realtime = useRealtimeStore();
 const loading = ref(false);
 const summary = ref<DashboardSummary | null>(null);
 const unreadCount = ref(0);
+const todayLabel = new Intl.DateTimeFormat('zh-CN', {
+  timeZone: 'Asia/Shanghai',
+  month: 'long',
+  day: 'numeric',
+  weekday: 'long',
+}).format(new Date());
+const quickEntries = computed(() =>
+  [
+    {
+      path: '/plan-editor',
+      title: '编排课表',
+      hint: '时间表与教学安排',
+      icon: 'Calendar',
+      enabled: auth.can('schedule:read'),
+    },
+    { path: '/homeworks', title: '发布作业', hint: '布置并追踪完成情况', icon: 'Notebook', enabled: true },
+    { path: '/notifications', title: '通知与叫人', hint: '实时送达教室', icon: 'Bell', enabled: true },
+    {
+      path: '/clients',
+      title: '客户端',
+      hint: '设备状态与维护',
+      icon: 'Monitor',
+      enabled: auth.can('client:read'),
+    },
+  ].filter((entry) => entry.enabled),
+);
 
 const statCards = computed(() => {
   const data = summary.value;
@@ -100,6 +126,26 @@ function openNotification(item: NotificationDto): void {
       </div>
     </div>
 
+    <section class="dashboard-welcome">
+      <div>
+        <span class="welcome-eyebrow">{{ todayLabel }}</span>
+        <h3>{{ auth.displayName }}，欢迎回来</h3>
+        <p>教学安排、班级动态与设备运行，在这里集中处理。</p>
+      </div>
+      <div class="welcome-symbol" aria-hidden="true">
+        <el-icon><School /></el-icon>
+      </div>
+    </section>
+    <div class="dashboard-shortcuts" aria-label="常用功能">
+      <button v-for="entry in quickEntries" :key="entry.path" @click="router.push(entry.path)">
+        <el-icon><component :is="entry.icon" /></el-icon>
+        <span>
+          <strong>{{ entry.title }}</strong>
+          <small>{{ entry.hint }}</small>
+        </span>
+        <el-icon><Right /></el-icon>
+      </button>
+    </div>
     <div class="stat-grid">
       <StatCard
         v-for="(card, index) in statCards"
@@ -164,6 +210,113 @@ function openNotification(item: NotificationDto): void {
 </template>
 
 <style scoped>
+.dashboard-welcome {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  padding: 26px 30px;
+  border: 1px solid var(--el-color-primary-light-8);
+  border-radius: 14px;
+  margin-bottom: 16px;
+  background: linear-gradient(110deg, var(--el-color-primary-light-9), var(--ch-surface));
+}
+.welcome-eyebrow {
+  color: var(--ch-text-muted);
+  font-size: 12px;
+}
+.dashboard-welcome h3 {
+  margin: 10px 0;
+  color: var(--ch-text);
+  font-size: 24px;
+  font-weight: 600;
+}
+.dashboard-welcome p {
+  margin: 0;
+  color: var(--ch-text-secondary);
+}
+.welcome-symbol {
+  display: grid;
+  place-items: center;
+  width: 84px;
+  height: 84px;
+  border-radius: 24px;
+  background: var(--el-color-primary-light-8);
+  color: var(--el-color-primary);
+  font-size: 44px;
+  transform: rotate(-8deg);
+}
+.dashboard-shortcuts {
+  display: grid;
+  grid-template-columns: repeat(4, minmax(0, 1fr));
+  gap: 14px;
+  margin-bottom: 20px;
+}
+.dashboard-shortcuts button {
+  display: flex;
+  align-items: center;
+  gap: 12px;
+  padding: 18px;
+  min-width: 0;
+  border: 1px solid var(--ch-border);
+  border-radius: 12px;
+  background: var(--ch-surface);
+  color: var(--el-color-primary);
+  cursor: pointer;
+  text-align: left;
+  font: inherit;
+}
+.dashboard-shortcuts button:hover {
+  border-color: var(--el-color-primary-light-5);
+  background: var(--el-color-primary-light-9);
+}
+.dashboard-shortcuts button > .el-icon:first-child {
+  flex-shrink: 0;
+  width: 38px;
+  height: 38px;
+  border-radius: 10px;
+  background: var(--el-color-primary-light-9);
+  font-size: 22px;
+}
+.dashboard-shortcuts button > .el-icon:last-child {
+  margin-left: auto;
+}
+.dashboard-shortcuts span {
+  min-width: 0;
+}
+.dashboard-shortcuts strong {
+  display: block;
+  color: var(--ch-text);
+  font-weight: 500;
+  white-space: nowrap;
+}
+.dashboard-shortcuts small {
+  display: block;
+  font-size: 11px;
+  color: var(--ch-text-muted);
+  margin-top: 6px;
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+@media (max-width: 1200px) {
+  .dashboard-shortcuts {
+    grid-template-columns: repeat(2, minmax(0, 1fr));
+  }
+}
+@media (max-width: 600px) {
+  .dashboard-welcome {
+    padding: 20px;
+  }
+  .dashboard-welcome h3 {
+    font-size: 20px;
+  }
+  .welcome-symbol {
+    display: none;
+  }
+  .dashboard-shortcuts button {
+    padding: 12px;
+  }
+}
 .card-header {
   display: flex;
   align-items: center;
diff --git a/packages/web-admin/src/views/HomeworksView.vue b/packages/web-admin/src/views/HomeworksView.vue
index 0b7ef5d..c9df1f0 100644
--- a/packages/web-admin/src/views/HomeworksView.vue
+++ b/packages/web-admin/src/views/HomeworksView.vue
@@ -507,7 +507,7 @@ onUnmounted(() => {
     <div class="page-header">
       <div>
         <h2 class="page-title">作业发布</h2>
-        <p class="page-subtitle">发布后立即通过 WebSocket 广播到学生客户端（homework:new）</p>
+        <p class="page-subtitle">按班级和课程发布作业，实时送达教室并查看完成情况</p>
       </div>
       <div class="toolbar">
         <el-select
diff --git a/scripts/ui-smoke/main.cjs b/scripts/ui-smoke/main.cjs
index 77f3856..38494c0 100644
--- a/scripts/ui-smoke/main.cjs
+++ b/scripts/ui-smoke/main.cjs
@@ -493,6 +493,45 @@ async function main() {
     `出现=${tour?.appeared ?? '-'} 跳过后关闭=${tour?.closed ?? '-'}`,
   );
 
+  const navigation = await win.webContents.executeJavaScript(`(async () => {
+    const pause = () => new Promise(r => setTimeout(r,250));
+    const groups = [...document.querySelectorAll('.management-menu > .el-sub-menu')];
+    const targets = ['/notifications','/homeworks'];
+    let visited = true;
+    for (const path of targets) {
+      const item=document.querySelector('.management-menu [data-path="'+path+'"]');
+      if (!item) { visited=false; continue; }
+      const parent=item.closest('.el-sub-menu');
+      if (!parent.classList.contains('is-opened')) parent.querySelector('.el-sub-menu__title').click();
+      await pause(); item.click(); await pause();
+      visited = visited && location.pathname === path && !!document.querySelector('.management-breadcrumb');
+    }
+    const tabs=document.querySelectorAll('.workspace-tab').length;
+    const active=document.querySelector('.workspace-tab.active')?.textContent.includes('作业');
+    document.querySelector('[aria-label="搜索页面"]').click(); await pause();
+    const input=document.querySelector('.navigation-search input');
+    input.value='通知';input.dispatchEvent(new Event('input',{bubbles:true}));await pause();
+    const result=document.querySelector('.navigation-results button');result?.click();await pause();
+    const searched=location.pathname==='/notifications';
+    const close=document.querySelector('[aria-label="关闭通知发布"]');close?.click();await pause();
+    const closed=location.pathname==='/homeworks'&&!document.querySelector('[aria-label="关闭通知发布"]');
+    document.querySelector('[data-test="nav-collapse-toggle"]').click();await pause();
+    groups[0].querySelector('.management-group-title').click();await pause();
+    const railExpanded=!document.querySelector('.layout-aside.is-collapsed')&&groups[0].classList.contains('is-opened');
+    const current=document.querySelector('.management-menu [data-path="/homeworks"]')?.closest('.el-sub-menu');
+    if(current&&!current.classList.contains('is-opened')) current.querySelector('.el-sub-menu__title').click();await pause();
+
+    return {ok:groups.length>=2&&visited&&tabs>=3&&active&&searched&&closed&&railExpanded,railExpanded,groups:groups.length,tabs,visited,active,searched,closed};
+  })()`);
+  record('二级菜单、面包屑、页签切换关闭和权限内搜索均可用', navigation.ok, JSON.stringify(navigation));
+  if (process.env.UI_SMOKE_SHOTS_DIR) {
+    fs.mkdirSync(process.env.UI_SMOKE_SHOTS_DIR, { recursive: true });
+    fs.writeFileSync(
+      path.join(process.env.UI_SMOKE_SHOTS_DIR, 'desktop-management.png'),
+      (await win.webContents.capturePage()).toPNG(),
+    );
+  }
+
   // 4. 逐一点击侧边栏菜单
   const visited = [];
   const failures = [];