feat(后台): 侧栏分组带图标、可收起，加顶栏；所有后台页面统一页头

- 侧栏按 概览 / 教学内容 / 学情分析 / 站点管理 分组，去掉超管菜单里的重复项；
  菜单项的角色与路由守卫一一对应，没有题目权限的教师不再看到点了就被踢回首页的「题目」
- 顶栏：面包屑、回到前台、明暗切换、用户菜单（退出登录）；窄屏侧栏自动收起
- 新增 PageHeader：标题 + 右侧主操作 + 下方筛选栏，编辑页带返回按钮
- 卡点分析 / 年度趋势 / 标签管理从题目列表的按钮挪进侧栏
- 首页改成统计卡片 + 班级排名卡片；设置页按钮移到卡片右上角
- 题目、比赛、题单、用户列表的「选项」列固定在右侧，不再被挤出屏幕

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

apps/web/src/admin/achievement/list.vue

@@ -1,4 +1,5 @@
 <script setup lang="ts">
+import PageHeader from "admin/components/PageHeader.vue"
 import { NButton, NFlex } from "naive-ui"
 import { deleteAchievement, getAdminAchievements, type AdminAchievement } from "admin/api"
 import AchievementIcon from "shared/components/AchievementIcon.vue"
@@ -106,22 +107,21 @@ onMounted(load)
 </script>
 
 <template>
-  <n-card :title="title">
-    <template #header-extra>
+  <PageHeader
+    :title="title"
+    description="「已解锁人数」是唯一的仪表盘：配置一周后仍为 0，多半是阈值配错了而不是太难。"
+  >
+    <template #actions>
       <n-button type="primary" @click="create">新建成就</n-button>
     </template>
+  </PageHeader>
 
-    <n-alert type="info" style="margin-bottom: 12px">
-      「已解锁人数」是唯一的仪表盘：配置一周后仍为 0，多半是阈值配错了而不是太难。
-    </n-alert>
+  <n-data-table
+    :loading="loading"
+    :data="list"
+    :columns="columns"
+    :row-key="(row: AdminAchievement) => row.id"
+  />
 
-    <n-data-table
-      :loading="loading"
-      :data="list"
-      :columns="columns"
-      :row-key="(row: AdminAchievement) => row.id"
-    />
-
-    <AchievementModal v-model:show="showModal" :editing="editing" @saved="load" />
-  </n-card>
+  <AchievementModal v-model:show="showModal" :editing="editing" @saved="load" />
 </template>

apps/web/src/admin/ai/list.vue

@@ -1,13 +1,14 @@
 <template>
-  <n-flex justify="space-between" class="titleWrapper">
-    <h2 class="title">AI 学习分析报告</h2>
-    <n-input
-      v-model:value="query.username"
-      clearable
-      placeholder="输入用户名筛选"
-      style="width: 200px"
-    />
-  </n-flex>
+  <PageHeader title="AI 学习分析报告">
+    <template #filters>
+      <n-input
+        v-model:value="query.username"
+        clearable
+        placeholder="输入用户名筛选"
+        style="width: 220px"
+      />
+    </template>
+  </PageHeader>
   <n-alert
     v-if="pinnedReports.length > 0"
     type="warning"
@@ -60,6 +61,7 @@
 </template>
 
 <script lang="ts" setup>
+import PageHeader from "admin/components/PageHeader.vue"
 import { MdPreview } from "md-editor-v3"
 import "md-editor-v3/lib/preview.css"
 import Pagination from "shared/components/Pagination.vue"
@@ -168,13 +170,6 @@ watchDebounced(() => query.username, listReports, {
 </script>
 
 <style scoped>
-.titleWrapper {
-  margin-bottom: 16px;
-  align-items: center;
-}
-.title {
-  margin: 0;
-}
 .detail .meta {
   margin-bottom: 0;
 }

apps/web/src/admin/announcement/detail.vue

@@ -1,4 +1,5 @@
 <script lang="ts" setup>
+import PageHeader from "admin/components/PageHeader.vue"
 import { errorMessage } from "utils/api"
 import TextEditor from "shared/components/TextEditor.vue"
 import type { AnnouncementEdit } from "utils/types"
@@ -72,9 +73,10 @@ async function submit() {
 onMounted(init)
 </script>
 <template>
-  <h2 class="title">
-    {{ route.name === "admin announcement create" ? "新建公告" : "编辑公告" }}
-  </h2>
+  <PageHeader
+    :title="route.name === 'admin announcement create' ? '新建公告' : '编辑公告'"
+    :back="{ name: 'admin announcement list' }"
+  />
   <n-form inline>
     <n-form-item label="标题">
       <n-input class="contestTitle" v-model:value="announcement.title" />
@@ -95,10 +97,6 @@ onMounted(init)
   </n-flex>
 </template>
 <style scoped>
-.title {
-  margin-top: 0;
-}
-
 .select {
   width: 100px;
 }

apps/web/src/admin/announcement/list.vue

@@ -1,4 +1,5 @@
 <script setup lang="ts">
+import PageHeader from "admin/components/PageHeader.vue"
 import { NSwitch } from "naive-ui"
 import Pagination from "shared/components/Pagination.vue"
 import { parseTime } from "utils/functions"
@@ -93,22 +94,13 @@ watch(query, listAnnouncements, { deep: true })
 </script>
 
 <template>
-  <n-flex align="center" class="titleWrapper">
-    <h2 class="title">网站公告</h2>
-    <n-button type="primary" @click="$router.push({ name: 'admin announcement create' })">
-      新建
-    </n-button>
-  </n-flex>
+  <PageHeader title="网站公告">
+    <template #actions>
+      <n-button type="primary" @click="$router.push({ name: 'admin announcement create' })">
+        新建公告
+      </n-button>
+    </template>
+  </PageHeader>
   <n-data-table striped :columns="columns" :data="announcements" />
   <Pagination :total="total" v-model:limit="query.limit" v-model:page="query.page" />
 </template>
-
-<style scoped>
-.titleWrapper {
-  margin-bottom: 16px;
-}
-
-.title {
-  margin: 0;
-}
-</style>

apps/web/src/admin/components/PageHeader.vue

@@ -0,0 +1,99 @@
+<script setup lang="ts">
+import { Icon } from "@iconify/vue"
+import type { RouteLocationRaw } from "vue-router"
+
+/**
+ * 后台每一页顶上的那一块：标题行（返回 · 标题 · 标签 ········ 操作按钮），
+ * 下面可选一行筛选栏。以前每页各写一份 `.titleWrapper`，筛选控件和「新建」
+ * 挤在同一行、左右位置每页不一样，这里统一成一种排法。
+ *
+ * - `back`：给了就在标题前出一个返回按钮，跳到这个位置（不用 router.back，
+ *   从外链直接打开编辑页时没有「上一页」可回）
+ * - `#extra`：紧跟标题的小东西（计数 tag 之类）
+ * - `#actions`：标题行最右边的按钮，主操作放最后
+ * - `#filters`：筛选栏，靠左排
+ */
+defineProps<{
+  title: string
+  description?: string
+  back?: RouteLocationRaw
+}>()
+
+const slots = defineSlots<{
+  extra?: () => any
+  actions?: () => any
+  filters?: () => any
+}>()
+</script>
+
+<template>
+  <div class="pageHeader">
+    <div class="row">
+      <div class="heading">
+        <n-button v-if="back" quaternary circle size="small" @click="$router.push(back)">
+          <template #icon><Icon icon="ph:arrow-left" /></template>
+        </n-button>
+        <h2 class="title">{{ title }}</h2>
+        <slot name="extra" />
+      </div>
+      <div v-if="slots.actions" class="actions">
+        <slot name="actions" />
+      </div>
+    </div>
+    <n-text v-if="description" depth="3" class="description">{{ description }}</n-text>
+    <div v-if="slots.filters" class="filters">
+      <slot name="filters" />
+    </div>
+  </div>
+</template>
+
+<style scoped>
+.pageHeader {
+  margin-bottom: 16px;
+}
+
+.row {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  flex-wrap: wrap;
+  gap: 12px;
+  min-height: 34px;
+}
+
+.heading {
+  display: flex;
+  align-items: center;
+  flex-wrap: wrap;
+  gap: 8px;
+  min-width: 0;
+}
+
+.title {
+  margin: 0;
+  font-size: 20px;
+  font-weight: 600;
+  line-height: 1.4;
+}
+
+.actions {
+  display: flex;
+  align-items: center;
+  flex-wrap: wrap;
+  gap: 8px;
+}
+
+.description {
+  display: block;
+  margin-top: 4px;
+  font-size: 13px;
+}
+
+.filters {
+  display: flex;
+  align-items: center;
+  flex-wrap: wrap;
+  gap: 8px 12px;
+  margin-top: 12px;
+}
+</style>

apps/web/src/admin/contest/detail.vue

@@ -1,4 +1,5 @@
 <script setup lang="ts">
+import PageHeader from "admin/components/PageHeader.vue"
 import { errorMessage } from "utils/api"
 import { formatISO } from "date-fns"
 import TextEditor from "shared/components/TextEditor.vue"
@@ -112,23 +113,19 @@ onMounted(getContestDetail)
 </script>
 
 <template>
-  <n-flex class="titleWrapper" align="center">
-    <h2 class="title">
-      {{ route.name === "admin contest create" ? "新建比赛" : "编辑比赛" }}
-    </h2>
-    <template v-if="!props.contestID">
-      <n-alert type="success">
-        <template #header>
-          开始时间 {{ parseTime(contest.startTime, "YYYY年M月D日 HH:mm:ss") }}
-        </template>
-      </n-alert>
-      <n-alert type="warning">
-        <template #header>
-          结束时间 {{ parseTime(contest.endTime, "YYYY年M月D日 HH:mm:ss") }}
-        </template>
-      </n-alert>
+  <PageHeader
+    :title="route.name === 'admin contest create' ? '新建比赛' : '编辑比赛'"
+    :back="{ name: 'admin contest list' }"
+  >
+    <template v-if="!props.contestID" #extra>
+      <n-tag type="success" round>
+        开始 {{ parseTime(contest.startTime, "YYYY年M月D日 HH:mm:ss") }}
+      </n-tag>
+      <n-tag type="warning" round>
+        结束 {{ parseTime(contest.endTime, "YYYY年M月D日 HH:mm:ss") }}
+      </n-tag>
     </template>
-  </n-flex>
+  </PageHeader>
   <n-form inline>
     <n-form-item label="标题">
       <n-input style="width: 300px" v-model:value="contest.title" />
@@ -164,13 +161,3 @@ onMounted(getContestDetail)
     <n-button type="primary" @click="submit">保存</n-button>
   </n-flex>
 </template>
-
-<style scoped>
-.titleWrapper {
-  margin-bottom: 16px;
-}
-
-.title {
-  margin: 0;
-}
-</style>

apps/web/src/admin/contest/helper.vue

@@ -1,4 +1,5 @@
 <script setup lang="ts">
+import PageHeader from "admin/components/PageHeader.vue"
 import { errorMessage } from "utils/api"
 import type { AcmHelperItem, ContestSubmissionInfo } from "utils/types"
 import { NButton, NCheckbox, NSelect, NTag } from "naive-ui"
@@ -232,38 +233,37 @@ onMounted(loadData)
 
 <template>
   <n-flex vertical>
-    <n-flex justify="space-between" align="center">
-      <n-flex align="center">
-        <h2 style="margin: 0">比赛辅助检查</h2>
-        <n-tag type="info" size="large"> 总计: {{ stats.total }} </n-tag>
-        <n-tag type="success" size="large"> 已检查: {{ stats.checked }} </n-tag>
-        <n-tag type="warning" size="large"> 未检查: {{ stats.unchecked }} </n-tag>
-      </n-flex>
-      <n-button type="primary" :disabled="stats.unchecked === 0" @click="markAllAsChecked">
-        标记全部为已检查
-      </n-button>
-    </n-flex>
-
-    <n-alert type="info" style="margin-bottom: 16px">
-      <template #header>使用说明</template>
-      此工具用于赛后人工审核代码，检查是否存在抄袭、作弊等行为。请逐个查看通过（AC）的提交代码，检查完成后勾选"已检查"。
-    </n-alert>
-
-    <n-flex align="center" style="margin-bottom: 16px">
-      <n-input
-        v-model:value="query.username"
-        placeholder="筛选用户名"
-        style="width: 150px"
-        clearable
-      />
-      <n-input
-        v-model:value="query.problemId"
-        placeholder="筛选题目"
-        style="width: 150px"
-        clearable
-      />
-      <n-select v-model:value="query.checked" :options="checkedOptions" style="width: 120px" />
-    </n-flex>
+    <PageHeader
+      title="比赛辅助检查"
+      description="赛后人工审核代码，检查是否存在抄袭、作弊等行为。请逐个查看通过（AC）的提交代码，检查完成后勾选「已检查」。"
+      :back="{ name: 'admin contest list' }"
+    >
+      <template #extra>
+        <n-tag type="info" round>总计 {{ stats.total }}</n-tag>
+        <n-tag type="success" round>已检查 {{ stats.checked }}</n-tag>
+        <n-tag type="warning" round>未检查 {{ stats.unchecked }}</n-tag>
+      </template>
+      <template #actions>
+        <n-button type="primary" :disabled="stats.unchecked === 0" @click="markAllAsChecked">
+          标记全部为已检查
+        </n-button>
+      </template>
+      <template #filters>
+        <n-input
+          v-model:value="query.username"
+          placeholder="筛选用户名"
+          style="width: 150px"
+          clearable
+        />
+        <n-input
+          v-model:value="query.problemId"
+          placeholder="筛选题目"
+          style="width: 150px"
+          clearable
+        />
+        <n-select v-model:value="query.checked" :options="checkedOptions" style="width: 120px" />
+      </template>
+    </PageHeader>
 
     <n-data-table
       :columns="columns"

apps/web/src/admin/contest/list.vue

@@ -1,4 +1,5 @@
 <script setup lang="ts">
+import PageHeader from "admin/components/PageHeader.vue"
 import { NSwitch, NTag } from "naive-ui"
 import ContestTitle from "shared/components/ContestTitle.vue"
 import ContestAccessTag from "shared/components/ContestAccessTag.vue"
@@ -79,6 +80,7 @@ const columns: DataTableColumn<AdminContest>[] = [
   {
     title: "选项",
     key: "actions",
+    fixed: "right",
     width: 300,
     render: (row) => h(Actions, { contest: row }),
   },
@@ -99,27 +101,21 @@ watchDebounced(() => query.keyword, listContests, {
 </script>
 
 <template>
-  <n-flex justify="space-between" class="titleWrapper">
-    <n-flex align="center">
-      <h2 class="title">比赛列表</h2>
+  <PageHeader title="比赛列表">
+    <template #actions>
       <n-button type="primary" @click="$router.push({ name: 'admin contest create' })">
-        新建
+        新建比赛
       </n-button>
-    </n-flex>
-    <div>
-      <n-input v-model:value="query.keyword" placeholder="输入标题关键字" />
-    </div>
-  </n-flex>
+    </template>
+    <template #filters>
+      <n-input
+        v-model:value="query.keyword"
+        placeholder="输入标题关键字"
+        clearable
+        style="width: 220px"
+      />
+    </template>
+  </PageHeader>
   <n-data-table :columns="columns" :data="contests" />
   <Pagination :total="total" v-model:limit="query.limit" v-model:page="query.page" />
 </template>
-
-<style scoped>
-.titleWrapper {
-  margin-bottom: 16px;
-}
-
-.title {
-  margin: 0;
-}
-</style>

apps/web/src/admin/learn/index.vue

@@ -1,4 +1,5 @@
 <script setup lang="ts">
+import PageHeader from "admin/components/PageHeader.vue"
 import { TUTORIAL_READ_SECONDS } from "@oj2/contract"
 import { NProgress, NTag, NText } from "naive-ui"
 import { getLearnStudents, getLearnTutorials, getLearnExercises } from "admin/api"
@@ -357,33 +358,31 @@ onMounted(load)
 </script>
 
 <template>
-  <h2 style="margin-top: 0">自学情况</h2>
-
-  <n-flex align="center" style="margin-bottom: 16px">
-    <n-radio-group v-model:value="type" size="small">
-      <n-radio-button
-        v-for="item in typeOptions"
-        :key="item.value"
-        :value="item.value"
-        :label="item.label"
+  <!-- 口径写在表上方，免得老师对着「已读 0 课 / 累计 25 分钟」猜是不是坏了 -->
+  <PageHeader
+    title="自学情况"
+    :description="`「已读」按累计停留满 ${TUTORIAL_READ_SECONDS / 60} 分钟算，不足的只计时长`"
+  >
+    <template #filters>
+      <n-radio-group v-model:value="type" size="small">
+        <n-radio-button
+          v-for="item in typeOptions"
+          :key="item.value"
+          :value="item.value"
+          :label="item.label"
+        />
+      </n-radio-group>
+      <n-input
+        v-model:value="className"
+        placeholder="班级或年级，如 241 / 24"
+        clearable
+        style="width: 200px"
+        @keyup.enter="load"
+        @clear="load"
       />
-    </n-radio-group>
-    <n-input
-      v-model:value="className"
-      placeholder="班级或年级，如 241 / 24"
-      clearable
-      style="width: 200px"
-      @keyup.enter="load"
-      @clear="load"
-    />
-    <n-button type="primary" secondary @click="load">查询</n-button>
-    <n-text depth="3"> {{ studentCount }} 名学生，{{ startedCount }} 人已经开始学 </n-text>
-    <!-- 口径写在表上方，免得老师对着「已读 0 课 / 累计 25 分钟」猜是不是坏了 -->
-    <n-text depth="3" style="font-size: 12px">
-      「已读」按累计停留满
-      {{ TUTORIAL_READ_SECONDS / 60 }} 分钟算，不足的只计时长
-    </n-text>
-  </n-flex>
+      <n-button type="primary" secondary @click="load">查询</n-button>
+    </template>
+  </PageHeader>
 
   <n-grid cols="2 s:3 m:5" :x-gap="12" :y-gap="12" responsive="screen" style="margin-bottom: 16px">
     <n-gi>

apps/web/src/admin/problem/Stuck.vue

@@ -1,4 +1,5 @@
 <script setup lang="ts">
+import PageHeader from "admin/components/PageHeader.vue"
 import { getStuckProblems } from "admin/api"
 import type { StuckProblem } from "utils/types"
 
@@ -37,7 +38,7 @@ onMounted(async () => {
 </script>
 
 <template>
-  <h2 style="margin-top: 0">学生卡点分析（只分析前40道题目）</h2>
+  <PageHeader title="卡点分析" description="只分析前 40 道题目" />
   <n-data-table
     :loading="loading"
     :columns="columns"

apps/web/src/admin/problem/TopACTrend.vue

@@ -1,4 +1,5 @@
 <script setup lang="ts">
+import PageHeader from "admin/components/PageHeader.vue"
 import type { AcTrend } from "utils/types"
 import { Line } from "vue-chartjs"
 import {
@@ -127,31 +128,34 @@ onMounted(fetchData)
 </script>
 
 <template>
-  <h2 style="margin-top: 0">年度趋势</h2>
-  <n-space align="center" style="margin-bottom: 16px">
-    <span>年份范围</span>
-    <n-select
-      v-model:value="sinceYear"
-      :options="yearOptions"
-      style="width: 100px"
-      @update:value="fetchData"
-    />
-    <span>—</span>
-    <n-select
-      v-model:value="untilYear"
-      :options="yearOptions"
-      style="width: 100px"
-      @update:value="fetchData"
-    />
-    <span>年提交下限</span>
-    <n-select
-      v-model:value="minPerYear"
-      :options="minPerYearOptions"
-      style="width: 90px"
-      @update:value="fetchData"
-    />
-    <n-tag type="info" size="small">共 {{ data.length }} 题</n-tag>
-  </n-space>
+  <PageHeader title="年度趋势">
+    <template #extra>
+      <n-tag type="info" size="small" round>共 {{ data.length }} 题</n-tag>
+    </template>
+    <template #filters>
+      <span>年份范围</span>
+      <n-select
+        v-model:value="sinceYear"
+        :options="yearOptions"
+        style="width: 100px"
+        @update:value="fetchData"
+      />
+      <span>—</span>
+      <n-select
+        v-model:value="untilYear"
+        :options="yearOptions"
+        style="width: 100px"
+        @update:value="fetchData"
+      />
+      <span>年提交下限</span>
+      <n-select
+        v-model:value="minPerYear"
+        :options="minPerYearOptions"
+        style="width: 90px"
+        @update:value="fetchData"
+      />
+    </template>
+  </PageHeader>
   <n-spin :show="loading">
     <div v-if="!loading && data.length === 0" style="text-align: center; padding: 40px">
       暂无数据

apps/web/src/admin/problem/detail.vue

@@ -1,4 +1,5 @@
 <script setup lang="ts">
+import PageHeader from "admin/components/PageHeader.vue"
 import { errorCode, errorMessage } from "utils/api"
 import { PROBLEM_TAG_MAX_LENGTH } from "@oj2/contract"
 import { getProblemTagList } from "shared/api"
@@ -529,10 +530,18 @@ watch(
 </script>
 
 <template>
-  <n-flex>
-    <h2 class="title">{{ title }}</h2>
-    <n-button v-if="showClear" @click="clear">清空缓存</n-button>
-  </n-flex>
+  <PageHeader
+    :title="title ?? '题目'"
+    :back="
+      props.contestID
+        ? { name: 'admin contest problem list', params: { contestID: props.contestID } }
+        : { name: 'admin problem list' }
+    "
+  >
+    <template #actions>
+      <n-button v-if="showClear" @click="clear">清空缓存</n-button>
+    </template>
+  </PageHeader>
   <n-form inline label-placement="left">
     <n-form-item label="显示编号">
       <n-input class="w-100" v-model:value="problem._id" />
@@ -832,10 +841,6 @@ watch(
 </template>
 
 <style scoped>
-.title {
-  margin-top: 0;
-}
-
 .box {
   margin-bottom: 20px;
 }

apps/web/src/admin/problem/list.vue

@@ -13,6 +13,7 @@ import { useRouteQuery } from "@vueuse/router"
 import AuthorSelect from "shared/components/AuthorSelect.vue"
 import type { DataTableRowKey } from "naive-ui"
 import BatchTagModal from "./components/BatchTagModal.vue"
+import PageHeader from "admin/components/PageHeader.vue"
 
 interface Props {
   contestID?: string
@@ -166,6 +167,7 @@ const baseColumns: DataTableColumn<AdminProblemRow>[] = [
   {
     title: "选项",
     key: "actions",
+    fixed: "right",
     width: 320,
     render: (row) =>
       h(Actions, {
@@ -232,54 +234,41 @@ watch(() => [query.page, query.limit, query.author], listProblems)
 </script>
 
 <template>
-  <n-flex class="titleWrapper" justify="space-between">
-    <n-flex align="center">
-      <h2 class="title">{{ title }}</h2>
-      <n-button
-        v-if="!isContestProblemList"
-        type="primary"
-        @click="$router.push({ name: 'admin problem create' })"
-      >
-        新建
-      </n-button>
-      <n-button
-        v-if="!isContestProblemList"
-        @click="$router.push({ name: 'admin stuck problems' })"
-      >
-        卡点分析
-      </n-button>
-      <n-button v-if="!isContestProblemList" @click="$router.push({ name: 'admin top ac trend' })">
-        年度趋势
-      </n-button>
-      <n-button v-if="!isContestProblemList" @click="$router.push({ name: 'admin tag list' })">
-        标签管理
-      </n-button>
-    </n-flex>
-    <n-flex>
-      <template v-if="!isContestProblemList && selectedProblemIds.length">
-        <n-button type="primary" @click="openBatchTag('add')">
-          添加标签（{{ selectedProblemIds.length }}）
+  <PageHeader
+    :title="title ?? '题目列表'"
+    :back="isContestProblemList ? { name: 'admin contest list' } : undefined"
+  >
+    <template #actions>
+      <template v-if="!isContestProblemList">
+        <template v-if="selectedProblemIds.length">
+          <n-button @click="openBatchTag('remove')">移除标签</n-button>
+          <n-button secondary type="primary" @click="openBatchTag('add')">
+            添加标签（{{ selectedProblemIds.length }}）
+          </n-button>
+        </template>
+        <n-button type="primary" @click="$router.push({ name: 'admin problem create' })">
+          新建题目
         </n-button>
-        <n-button @click="openBatchTag('remove')">移除标签</n-button>
       </template>
-      <n-button v-if="isContestProblemList" @click="createContestProblem"> 新建比赛题目 </n-button>
-      <n-button v-if="isContestProblemList" type="primary" @click="selectProblems">
-        从题目中选择
-      </n-button>
-      <n-flex align="center" v-if="!props.contestID">
-        <span>出题人</span>
+      <template v-else>
+        <n-button @click="createContestProblem">新建比赛题目</n-button>
+        <n-button type="primary" @click="selectProblems">从题库中选择</n-button>
+      </template>
+    </template>
+    <template #filters>
+      <n-input
+        v-model:value="query.keyword"
+        placeholder="输入标题关键字"
+        clearable
+        style="width: 220px"
+        @clear="clearQuery"
+      />
+      <n-flex v-if="!props.contestID" align="center" :size="8">
+        <n-text depth="3">出题人</n-text>
         <AuthorSelect v-model:value="query.author" all />
       </n-flex>
-      <div>
-        <n-input
-          v-model:value="query.keyword"
-          placeholder="输入标题关键字"
-          clearable
-          @clear="clearQuery"
-        />
-      </div>
-    </n-flex>
-  </n-flex>
+    </template>
+  </PageHeader>
   <n-data-table
     striped
     :columns="columns"
@@ -301,13 +290,3 @@ watch(() => [query.page, query.limit, query.author], listProblems)
     @done="onBatchTagDone"
   />
 </template>
-
-<style scoped>
-.titleWrapper {
-  margin-bottom: 16px;
-}
-
-.title {
-  margin: 0;
-}
-</style>

apps/web/src/admin/problem/tags.vue

@@ -1,4 +1,5 @@
 <script setup lang="ts">
+import PageHeader from "admin/components/PageHeader.vue"
 import { NButton, NFlex, NInput } from "naive-ui"
 import type { AdminTag } from "utils/types"
 import { deleteTag, getTagAdminList, renameTag } from "../api"
@@ -144,13 +145,11 @@ watchDebounced(keyword, listTags, { debounce: 500, maxWait: 1000 })
 </script>
 
 <template>
-  <n-flex class="titleWrapper" justify="space-between">
-    <n-flex align="center">
-      <h2 class="title">标签管理</h2>
-      <n-button @click="$router.push({ name: 'admin problem list' })"> 返回题目列表 </n-button>
-    </n-flex>
-    <n-input v-model:value="keyword" style="width: 200px" placeholder="搜索标签" clearable />
-  </n-flex>
+  <PageHeader title="标签管理">
+    <template #filters>
+      <n-input v-model:value="keyword" style="width: 220px" placeholder="搜索标签" clearable />
+    </template>
+  </PageHeader>
   <n-data-table striped :columns="columns" :data="tags" />
   <TagProblemsModal
     v-model:show="showTagProblems"
@@ -159,13 +158,3 @@ watchDebounced(keyword, listTags, { debounce: 500, maxWait: 1000 })
     @changed="listTags"
   />
 </template>
-
-<style scoped>
-.titleWrapper {
-  margin-bottom: 16px;
-}
-
-.title {
-  margin: 0;
-}
-</style>

apps/web/src/admin/problemset/detail.vue

@@ -1,6 +1,7 @@
 <script setup lang="ts">
+import PageHeader from "admin/components/PageHeader.vue"
 import { errorMessage } from "utils/api"
-import { NTabPane, NTabs, NButton, NFlex } from "naive-ui"
+import { NTabPane, NTabs, NButton } from "naive-ui"
 import type {
   AdminProblemSet,
   AdminProblemSetProblem,
@@ -200,20 +201,21 @@ onMounted(() => {
 
 <template>
   <div v-if="problemSet">
-    <n-flex class="titleWrapper" justify="space-between" align="center">
-      <h2 class="title">{{ problemSet.title }}</h2>
-      <n-button
-        type="primary"
-        @click="
-          router.push({
-            name: 'admin problemset edit',
-            params: { problemSetId },
-          })
-        "
-      >
-        编辑题单
-      </n-button>
-    </n-flex>
+    <PageHeader :title="problemSet.title" :back="{ name: 'admin problemset list' }">
+      <template #actions>
+        <n-button
+          type="primary"
+          @click="
+            router.push({
+              name: 'admin problemset edit',
+              params: { problemSetId },
+            })
+          "
+        >
+          编辑题单
+        </n-button>
+      </template>
+    </PageHeader>
 
     <ProblemSetInfo :problem-set="problemSet" />
 
@@ -257,13 +259,3 @@ onMounted(() => {
     />
   </div>
 </template>
-
-<style scoped>
-.titleWrapper {
-  margin-bottom: 16px;
-}
-
-.title {
-  margin: 0;
-}
-</style>

apps/web/src/admin/problemset/edit.vue

@@ -1,4 +1,5 @@
 <script setup lang="ts">
+import PageHeader from "admin/components/PageHeader.vue"
 import { errorMessage } from "utils/api"
 import type { CreateProblemSetData, EditProblemSetData } from "utils/types"
 import { fromPickerValue, toPickerValue } from "utils/functions"
@@ -101,7 +102,14 @@ onMounted(() => {
 
 <template>
   <div>
-    <h2 class="title">{{ isEdit ? "编辑题单" : "创建题单" }}</h2>
+    <PageHeader
+      :title="isEdit ? '编辑题单' : '新建题单'"
+      :back="
+        isEdit
+          ? { name: 'admin problemset detail', params: { problemSetId } }
+          : { name: 'admin problemset list' }
+      "
+    />
 
     <n-form :model="formData" label-placement="top">
       <n-flex>
@@ -158,9 +166,3 @@ onMounted(() => {
     </n-form>
   </div>
 </template>
-
-<style scoped>
-.title {
-  margin: 0 0 16px 0;
-}
-</style>

apps/web/src/admin/problemset/list.vue

@@ -1,4 +1,5 @@
 <script setup lang="ts">
+import PageHeader from "admin/components/PageHeader.vue"
 import Pagination from "shared/components/Pagination.vue"
 import { usePagination } from "shared/composables/pagination"
 import { parseTime } from "utils/functions"
@@ -96,6 +97,7 @@ const columns: DataTableColumn<AdminProblemSet>[] = [
   {
     title: "选项",
     key: "actions",
+    fixed: "right",
     width: 300,
     render: (row) =>
       h(Actions, {
@@ -142,53 +144,36 @@ watch(() => [query.page, query.limit, query.difficulty, query.status], listProbl
 </script>
 
 <template>
-  <n-flex class="titleWrapper" justify="space-between">
-    <n-flex align="center">
-      <h2 class="title">题单管理</h2>
+  <PageHeader title="题单列表">
+    <template #actions>
       <n-button type="primary" @click="$router.push({ name: 'admin problemset create' })">
         新建题单
       </n-button>
-    </n-flex>
-    <n-flex align="center">
-      <n-flex align="center">
-        <span>难度：</span>
-        <n-select
-          v-model:value="query.difficulty"
-          :options="difficultyOptions"
-          placeholder="选择难度"
-          style="width: 120px"
-          clearable
-        />
-      </n-flex>
-      <n-flex align="center">
-        <span>状态：</span>
-        <n-select
-          v-model:value="query.status"
-          :options="statusOptions"
-          placeholder="选择状态"
-          style="width: 120px"
-          clearable
-        />
-      </n-flex>
+    </template>
+    <template #filters>
       <n-input
         v-model:value="query.keyword"
         placeholder="输入标题关键字"
         clearable
         @clear="clearQuery"
-        style="width: 200px"
+        style="width: 220px"
       />
-    </n-flex>
-  </n-flex>
+      <n-select
+        v-model:value="query.difficulty"
+        :options="difficultyOptions"
+        placeholder="全部难度"
+        style="width: 120px"
+        clearable
+      />
+      <n-select
+        v-model:value="query.status"
+        :options="statusOptions"
+        placeholder="全部状态"
+        style="width: 120px"
+        clearable
+      />
+    </template>
+  </PageHeader>
   <n-data-table striped :columns="columns" :data="problemSets" />
   <Pagination :total="total" v-model:limit="query.limit" v-model:page="query.page" />
 </template>
-
-<style scoped>
-.titleWrapper {
-  margin-bottom: 16px;
-}
-
-.title {
-  margin: 0;
-}
-</style>

apps/web/src/admin/setting/config.vue

@@ -1,4 +1,5 @@
 <script setup lang="ts">
+import PageHeader from "admin/components/PageHeader.vue"
 import { errorMessage } from "utils/api"
 import { NButton, NTag } from "naive-ui"
 import { CLASS_NAME_MAX_DIGITS, CLASS_NAME_MIN_DIGITS, CLASS_NAME_RE } from "utils/constants"
@@ -250,12 +251,10 @@ onMounted(() => {
 </script>
 
 <template>
-  <n-card class="box">
-    <template #header>
-      <n-flex align="center">
-        网站设置
-        <n-button type="primary" size="small" @click="saveWebsiteConfig"> 保存 </n-button>
-      </n-flex>
+  <PageHeader title="设置" />
+  <n-card class="box" title="网站">
+    <template #header-extra>
+      <n-button type="primary" size="small" @click="saveWebsiteConfig">保存</n-button>
     </template>
     <n-form inline label-placement="left">
       <n-form-item label="网站 URL">
@@ -295,31 +294,25 @@ onMounted(() => {
       </n-flex>
     </n-flex>
   </n-card>
-  <n-card class="box">
-    <template #header>
-      <n-flex align="center">
-        判题服务器
-        <n-button
-          v-if="abnormalServers.length"
-          size="small"
-          type="warning"
-          @click="deleteAbnormalServers"
-        >
-          删除无效服务器
-        </n-button>
-      </n-flex>
+  <n-card class="box" title="判题服务器">
+    <template #header-extra>
+      <n-button
+        v-if="abnormalServers.length"
+        size="small"
+        type="warning"
+        @click="deleteAbnormalServers"
+      >
+        删除无效服务器
+      </n-button>
     </template>
     <div class="box">
       接口凭证 <n-tag size="small">{{ token }}</n-tag>
     </div>
     <n-data-table :single-line="false" striped :columns="serverColumns" :data="servers" />
   </n-card>
-  <n-card class="box" v-if="testcases.length">
-    <template #header>
-      <n-flex align="center">
-        无效的测试用例
-        <n-button size="small" type="warning" @click="() => deleteTestcase()"> 全部删除 </n-button>
-      </n-flex>
+  <n-card class="box" v-if="testcases.length" title="无效的测试用例">
+    <template #header-extra>
+      <n-button size="small" type="warning" @click="() => deleteTestcase()">全部删除</n-button>
     </template>
     <n-data-table striped class="table" :columns="testcaseColumns" :data="testcases" />
   </n-card>

apps/web/src/admin/setting/home.vue

@@ -2,6 +2,7 @@
 import { h, onMounted, reactive, ref, watch } from "vue"
 import { useRouter } from "vue-router"
 import { NButton } from "naive-ui"
+import PageHeader from "admin/components/PageHeader.vue"
 import Pagination from "shared/components/Pagination.vue"
 import { useUserStore } from "shared/store/user"
 import { getACRate } from "utils/functions"
@@ -151,50 +152,56 @@ watch(showModal, (v) => {
 </script>
 
 <template>
-  <n-flex align="center">
-    <n-avatar round :size="60" :src="userStore.profile?.avatar" />
-    <h1 class="name">亲爱的管理员：{{ userStore.user?.username }}</h1>
-  </n-flex>
-  <n-flex>
-    <h2>
-      <n-gradient-text type="info"> 总用户数：{{ userCount }} </n-gradient-text>
-    </h2>
-    <h2>
-      <n-gradient-text type="error"> 今日提交：{{ submissionCount }} </n-gradient-text>
-    </h2>
-    <h2>
-      <n-gradient-text type="warning"> 近期比赛：{{ contestCount }} </n-gradient-text>
-    </h2>
-    <h2>
+  <PageHeader :title="`你好，${userStore.user?.username ?? '管理员'}`">
+    <template #actions>
+      <n-button @click="router.push('/admin/contest/create')">新建比赛</n-button>
+      <n-button type="primary" @click="router.push('/admin/problem/create')">新建题目</n-button>
+    </template>
+  </PageHeader>
+
+  <n-grid cols="2 m:4" :x-gap="12" :y-gap="12" responsive="screen" class="stats">
+    <n-gi>
+      <n-card size="small"><n-statistic label="总用户数" :value="userCount" /></n-card>
+    </n-gi>
+    <n-gi>
+      <n-card size="small"><n-statistic label="今日提交" :value="submissionCount" /></n-card>
+    </n-gi>
+    <n-gi>
+      <n-card size="small"><n-statistic label="近期比赛" :value="contestCount" /></n-card>
+    </n-gi>
+    <n-gi>
       <!-- 判题机数量后端一直在下发，这里以前没显示 —— 判题机全掉线的时候，
            这一栏是 0，比学生喊「交了没反应」早得多 -->
-      <n-gradient-text :type="judgeServerCount > 0 ? 'success' : 'error'">
-        在线判题机：{{ judgeServerCount }}
-      </n-gradient-text>
-    </h2>
-  </n-flex>
-  <n-flex align="center" class="actions">
-    <span>我猜你要：</span>
-    <n-button @click="router.push('/admin/problem/create')">新题目</n-button>
-    <n-button @click="router.push('/admin/contest/create')">新比赛</n-button>
-    <div>
-      <n-input
-        style="width: 200px"
-        clearable
-        v-model:value="query.classroom"
-        placeholder="班级前缀"
-      />
-    </div>
-    <n-button @click="listRanks">用户排名</n-button>
-    <n-button @click="getRandomModal" v-if="query.classroom">随机抽签</n-button>
-    <Pagination
-      class="pagination"
-      :total="total"
-      v-model:page="query.page"
-      v-model:limit="query.limit"
-    />
-  </n-flex>
-  <n-data-table v-if="data.length" striped :data="data" :columns="columns" />
+      <n-card size="small">
+        <n-statistic label="在线判题机">
+          <n-text :type="judgeServerCount > 0 ? 'success' : 'error'">
+            {{ judgeServerCount }}
+          </n-text>
+        </n-statistic>
+      </n-card>
+    </n-gi>
+  </n-grid>
+
+  <n-card size="small" title="班级排名">
+    <template #header-extra>
+      <n-flex align="center" :size="8">
+        <n-input
+          style="width: 160px"
+          clearable
+          v-model:value="query.classroom"
+          placeholder="班级前缀"
+          @keyup.enter="listRanks"
+        />
+        <n-button secondary type="primary" @click="listRanks">查询</n-button>
+        <n-button v-if="query.classroom" @click="getRandomModal">随机抽签</n-button>
+      </n-flex>
+    </template>
+    <template v-if="data.length">
+      <n-data-table striped :data="data" :columns="columns" />
+      <Pagination :total="total" v-model:page="query.page" v-model:limit="query.limit" />
+    </template>
+    <n-empty v-else description="输入班级前缀后查询" style="padding: 24px 0" />
+  </n-card>
   <n-modal preset="card" title="猜猜看幸运儿是谁？" v-model:show="showModal" style="width: 400px">
     <n-flex vertical justify="center" align="center">
       <n-h1 :key="pulseKey" class="lucky pulse">{{ luckyGuy }}</n-h1>
@@ -206,17 +213,8 @@ watch(showModal, (v) => {
 </template>
 
 <style scoped>
-.name {
-  font-size: 32px;
-  margin: 0;
-}
-
-.actions {
-  margin-bottom: 20px;
-}
-
-.pagination {
-  margin: 0;
+.stats {
+  margin-bottom: 16px;
 }
 
 .lucky {

apps/web/src/admin/tutorial/detail.vue

@@ -1,4 +1,5 @@
 <script lang="ts" setup>
+import PageHeader from "admin/components/PageHeader.vue"
 import { errorMessage } from "utils/api"
 import CodeEditor from "shared/components/CodeEditor.vue"
 import MarkdownEditor from "shared/components/MarkdownEditor.vue"
@@ -72,9 +73,10 @@ async function submit() {
 onMounted(init)
 </script>
 <template>
-  <h2 class="title">
-    {{ route.name === "admin tutorial create" ? "新建教程" : "编辑教程" }}
-  </h2>
+  <PageHeader
+    :title="route.name === 'admin tutorial create' ? '新建教程' : '编辑教程'"
+    :back="{ name: 'admin tutorial list' }"
+  />
   <n-form inline>
     <n-form-item label="标题">
       <n-input class="contestTitle" v-model:value="tutorial.title" />
@@ -111,10 +113,6 @@ onMounted(init)
   </n-tabs>
 </template>
 <style scoped>
-.title {
-  margin-top: 0;
-}
-
 .select {
   width: 100px;
 }

apps/web/src/admin/tutorial/list.vue

@@ -1,4 +1,5 @@
 <script setup lang="ts">
+import PageHeader from "admin/components/PageHeader.vue"
 import { errorMessage } from "utils/api"
 import { NSwitch } from "naive-ui"
 import { parseTime } from "utils/functions"
@@ -77,12 +78,13 @@ onMounted(listTutorials)
 </script>
 
 <template>
-  <n-flex align="center" class="titleWrapper">
-    <h2 class="title">教程列表</h2>
-    <n-button type="primary" @click="$router.push({ name: 'admin tutorial create' })">
-      新建
-    </n-button>
-  </n-flex>
+  <PageHeader title="教程列表">
+    <template #actions>
+      <n-button type="primary" @click="$router.push({ name: 'admin tutorial create' })">
+        新建教程
+      </n-button>
+    </template>
+  </PageHeader>
   <n-tabs v-model:value="activeTab" type="line" animated>
     <n-tab-pane name="python" tab="Python">
       <n-data-table striped :columns="columns" :data="tutorials.python" />
@@ -92,13 +94,3 @@ onMounted(listTutorials)
     </n-tab-pane>
   </n-tabs>
 </template>
-
-<style scoped>
-.titleWrapper {
-  margin-bottom: 16px;
-}
-
-.title {
-  margin: 0;
-}
-</style>

apps/web/src/admin/user/generate.vue

@@ -1,4 +1,5 @@
 <script setup lang="ts">
+import PageHeader from "admin/components/PageHeader.vue"
 import { errorMessage } from "utils/api"
 import {
   CLASS_NAME_MAX_DIGITS,
@@ -81,6 +82,11 @@ async function submit() {
 </script>
 
 <template>
+  <PageHeader
+    title="批量导入用户"
+    description="每行一个名字，用户名为 ks + 班级号 + 名字，密码随机生成；导入后会下载账号清单"
+    :back="{ name: 'admin user list' }"
+  />
   <n-space>
     <n-flex vertical>
       <n-flex align="center">

apps/web/src/admin/user/list.vue

@@ -1,4 +1,5 @@
 <script setup lang="ts">
+import PageHeader from "admin/components/PageHeader.vue"
 import { errorMessage } from "utils/api"
 import { DataTableRowKey, NFlex, NTag, SelectOption } from "naive-ui"
 import Pagination from "shared/components/Pagination.vue"
@@ -105,6 +106,7 @@ const columns: DataTableColumn<AdminUserForm>[] = [
     key: "actions",
     title: "选项",
     width: 280,
+    fixed: "right",
     render: (row) =>
       h(Actions, {
         user: row,
@@ -252,43 +254,39 @@ watch(() => [query.page, query.limit, query.type, query.orderBy], listUsers)
 </script>
 
 <template>
-  <n-flex class="titleWrapper" justify="space-between">
-    <n-flex>
-      <h2 class="title">用户列表</h2>
-      <n-button type="primary" @click="createNewUser">新建</n-button>
-      <n-button @click="$router.push({ name: 'admin user generate' })"> 导入 </n-button>
-    </n-flex>
-    <n-flex>
+  <PageHeader title="用户列表">
+    <template #actions>
       <n-popconfirm v-if="userIDs.length" @positive-click="onDeleteUsers(userIDs)">
         <template #trigger>
-          <n-button type="warning">删除</n-button>
+          <n-button type="error" secondary>删除选中（{{ userIDs.length }}）</n-button>
         </template>
         确定删除选中的用户吗？删除后无法恢复！
       </n-popconfirm>
-      <n-flex align="center">
-        <n-select
-          v-model:value="query.orderBy"
-          :options="sortOptions"
-          placeholder="排序方式"
-          style="width: 120px"
-        />
-        <n-select
-          v-model:value="query.type"
-          :options="adminOptions"
-          placeholder="选择用户类型"
-          style="width: 120px"
-        />
-        <div>
-          <n-input
-            style="width: 200px"
-            v-model:value="query.keyword"
-            clearable
-            @clear="clearQuery"
-          />
-        </div>
-      </n-flex>
-    </n-flex>
-  </n-flex>
+      <n-button @click="$router.push({ name: 'admin user generate' })">批量导入</n-button>
+      <n-button type="primary" @click="createNewUser">新建用户</n-button>
+    </template>
+    <template #filters>
+      <n-input
+        style="width: 220px"
+        v-model:value="query.keyword"
+        placeholder="用户名 / 真名 / 邮箱"
+        clearable
+        @clear="clearQuery"
+      />
+      <n-select
+        v-model:value="query.type"
+        :options="adminOptions"
+        placeholder="选择用户类型"
+        style="width: 120px"
+      />
+      <n-select
+        v-model:value="query.orderBy"
+        :options="sortOptions"
+        placeholder="排序方式"
+        style="width: 120px"
+      />
+    </template>
+  </PageHeader>
   <n-data-table
     :data="users"
     :columns="columns"
@@ -353,13 +351,3 @@ watch(() => [query.page, query.limit, query.type, query.orderBy], listUsers)
     </n-form>
   </n-modal>
 </template>
-
-<style scoped>
-.titleWrapper {
-  margin-bottom: 16px;
-}
-
-.title {
-  margin: 0;
-}
-</style>

apps/web/src/shared/layout/admin.vue

@@ -1,6 +1,9 @@
 <script setup lang="ts">
 import { h } from "vue"
+import { Icon } from "@iconify/vue"
 import { RouterLink } from "vue-router"
+import { useBreakpoints } from "shared/composables/breakpoints"
+import { useDarkTransition } from "shared/composables/darkTransition"
 import { STORAGE_KEY } from "utils/constants"
 import storage from "utils/storage"
 import { useUserStore } from "../store/user"
@@ -9,122 +12,205 @@ import type { MenuOption } from "naive-ui"
 const route = useRoute()
 const router = useRouter()
 const userStore = useUserStore()
+const { isMobile } = useBreakpoints()
+const { isDark, toggleDark } = useDarkTransition()
 
-// 根据用户权限动态生成菜单选项
-const options = computed<MenuOption[]>(() => {
-  const baseOptions: MenuOption[] = [
-    {
-      label: () => h(RouterLink, { to: "/" }, { default: () => "前台" }),
-      key: "return to OJ",
-    },
-  ]
+/**
+ * 菜单的唯一一张表。`role` 必须和 routes.ts 里对应路由的 meta 对齐：
+ * 菜单里露出一个守卫不放行的入口，点下去就是被静默踢回首页。
+ * `path` 同时用来判定高亮：取当前路径能匹配上的**最长**那一条，所以
+ * /admin/problem/stuck 亮「卡点分析」而不是「题目」。
+ */
+type Role = "problem" | "teacher" | "super"
+interface NavItem {
+  label: string
+  icon: string
+  path: string
+  /** 点击跳到哪；不写就是 path 本身（path 只是前缀时必须写，前缀不一定有路由） */
+  to?: string
+  role: Role
+}
+interface NavGroup {
+  label: string
+  items: NavItem[]
+}
 
-  // Student Admin: only problems
-  if (userStore.isStudentAdmin) {
-    baseOptions.push({
-      label: () => h(RouterLink, { to: "/admin/problem/list" }, { default: () => "题目" }),
-      key: "admin problem list",
-    })
+const NAV: NavGroup[] = [
+  {
+    label: "概览",
+    items: [{ label: "首页", icon: "ph:house", path: "/admin", role: "super" }],
+  },
+  {
+    label: "教学内容",
+    items: [
+      {
+        label: "题目",
+        icon: "ph:code",
+        path: "/admin/problem",
+        to: "/admin/problem/list",
+        role: "problem",
+      },
+      { label: "标签", icon: "ph:tag", path: "/admin/problem/tags", role: "problem" },
+      {
+        label: "比赛",
+        icon: "ph:flag-checkered",
+        path: "/admin/contest",
+        to: "/admin/contest/list",
+        role: "teacher",
+      },
+      {
+        label: "题单",
+        icon: "ph:list-checks",
+        path: "/admin/problemset",
+        to: "/admin/problemset/list",
+        role: "teacher",
+      },
+      {
+        label: "教程",
+        icon: "ph:book-open",
+        path: "/admin/tutorial",
+        to: "/admin/tutorial/list",
+        role: "super",
+      },
+    ],
+  },
+  {
+    label: "学情分析",
+    items: [
+      {
+        label: "卡点分析",
+        icon: "ph:warning-diamond",
+        path: "/admin/problem/stuck",
+        role: "teacher",
+      },
+      {
+        label: "年度趋势",
+        icon: "ph:chart-line-up",
+        path: "/admin/problem/top_ac_trend",
+        role: "teacher",
+      },
+      { label: "自学情况", icon: "ph:student", path: "/admin/learn", role: "teacher" },
+      {
+        label: "AI 报告",
+        icon: "ph:sparkle",
+        path: "/admin/ai",
+        to: "/admin/ai/reports",
+        role: "teacher",
+      },
+    ],
+  },
+  {
+    label: "站点管理",
+    items: [
+      {
+        label: "用户",
+        icon: "ph:users",
+        path: "/admin/user",
+        to: "/admin/user/list",
+        role: "super",
+      },
+      {
+        label: "公告",
+        icon: "ph:megaphone",
+        path: "/admin/announcement",
+        to: "/admin/announcement/list",
+        role: "super",
+      },
+      {
+        label: "成就",
+        icon: "ph:medal",
+        path: "/admin/achievement",
+        to: "/admin/achievement/list",
+        role: "super",
+      },
+      { label: "设置", icon: "ph:gear-six", path: "/admin/config", role: "super" },
+    ],
+  },
+]
+
+function allowed(role: Role) {
+  if (role === "super") return userStore.isSuperAdmin
+  if (role === "teacher") return userStore.isTeacherOrAbove
+  return userStore.hasProblemPermission
+}
+
+const groups = computed(() =>
+  NAV.map((g) => ({ ...g, items: g.items.filter((i) => allowed(i.role)) })).filter(
+    (g) => g.items.length,
+  ),
+)
+
+function renderIcon(icon: string) {
+  return () => h(Icon, { icon, width: 18 })
+}
+
+function toOption(i: NavItem): MenuOption {
+  return {
+    key: i.path,
+    icon: renderIcon(i.icon),
+    label: () => h(RouterLink, { to: i.to ?? i.path }, { default: () => i.label }),
   }
+}
 
-  // Teacher Admin: problems + contests + problemsets
-  if (userStore.isTeacherAdmin) {
-    baseOptions.push(
-      {
-        label: () => h(RouterLink, { to: "/admin/problem/list" }, { default: () => "题目" }),
-        key: "admin problem list",
-      },
-      {
-        label: () => h(RouterLink, { to: "/admin/contest/list" }, { default: () => "比赛" }),
-        key: "admin contest list",
-      },
-      {
-        label: () => h(RouterLink, { to: "/admin/problemset/list" }, { default: () => "题单" }),
-        key: "admin problemset list",
-      },
-      {
-        label: () => h(RouterLink, { to: "/admin/ai/reports" }, { default: () => "报告" }),
-        key: "admin ai reports",
-      },
-      {
-        label: () => h(RouterLink, { to: "/admin/learn" }, { default: () => "自学" }),
-        key: "admin learn analytics",
-      },
-    )
+// 收起时 64px 放不下分组标题（会折成两行），换成分隔线
+const options = computed<MenuOption[]>(() =>
+  siderCollapsed.value
+    ? groups.value.flatMap((g, idx) => [
+        ...(idx ? [{ type: "divider", key: `divider-${g.label}` }] : []),
+        ...g.items.map(toOption),
+      ])
+    : groups.value.map((g) => ({
+        type: "group",
+        key: g.label,
+        label: g.label,
+        children: g.items.map(toOption),
+      })),
+)
+
+function matches(path: string, prefix: string) {
+  // 首页只能精确匹配，否则它是所有后台路径的前缀
+  if (prefix === "/admin") return path === "/admin" || path === "/admin/"
+  return path === prefix || path.startsWith(prefix + "/")
+}
+
+const current = computed(() => {
+  let best: { group: NavGroup; item: NavItem } | null = null
+  for (const group of groups.value) {
+    for (const item of group.items) {
+      if (matches(route.path, item.path) && item.path.length > (best?.item.path.length ?? 0)) {
+        best = { group, item }
+      }
+    }
   }
-
-  // Super Admin: everything
-  if (userStore.isSuperAdmin) {
-    baseOptions.push(
-      {
-        label: () => h(RouterLink, { to: "/admin" }, { default: () => "管理" }),
-        key: "admin home",
-      },
-      {
-        label: () => h(RouterLink, { to: "/admin/config" }, { default: () => "设置" }),
-        key: "admin config",
-      },
-      {
-        label: () => h(RouterLink, { to: "/admin/problem/list" }, { default: () => "题目" }),
-        key: "admin problem list",
-      },
-      {
-        label: () => h(RouterLink, { to: "/admin/contest/list" }, { default: () => "比赛" }),
-        key: "admin contest list",
-      },
-      {
-        label: () => h(RouterLink, { to: "/admin/problemset/list" }, { default: () => "题单" }),
-        key: "admin problemset list",
-      },
-      {
-        label: () => h(RouterLink, { to: "/admin/user/list" }, { default: () => "用户" }),
-        key: "admin user list",
-      },
-      {
-        label: () => h(RouterLink, { to: "/admin/announcement/list" }, { default: () => "公告" }),
-        key: "admin announcement list",
-      },
-      {
-        label: () => h(RouterLink, { to: "/admin/tutorial/list" }, { default: () => "教程" }),
-        key: "admin tutorial list",
-      },
-      {
-        label: () => h(RouterLink, { to: "/admin/achievement/list" }, { default: () => "成就" }),
-        key: "admin achievement list",
-      },
-      {
-        label: () => h(RouterLink, { to: "/admin/ai/reports" }, { default: () => "报告" }),
-        key: "admin ai reports",
-      },
-      {
-        label: () => h(RouterLink, { to: "/admin/learn" }, { default: () => "自学" }),
-        key: "admin learn analytics",
-      },
-    )
-  }
-
-  return baseOptions
+  return best
 })
 
-// 根据路径计算当前激活的菜单项
-const active = computed(() => {
-  const path = route.path
-  if (path === "/") return "return to OJ"
-  if (path === "/admin") return "admin home"
-  if (path.startsWith("/admin/config")) return "admin config"
-  if (path.startsWith("/admin/problemset")) return "admin problemset list"
-  if (path.startsWith("/admin/problem/stuck")) return "admin stuck problems"
-  if (path.startsWith("/admin/problem/tags")) return "admin problem list"
-  if (path.startsWith("/admin/problem")) return "admin problem list"
-  if (path.startsWith("/admin/contest")) return "admin contest list"
-  if (path.startsWith("/admin/user")) return "admin user list"
-  if (path.startsWith("/admin/announcement")) return "admin announcement list"
-  if (path.startsWith("/admin/tutorial")) return "admin tutorial list"
-  if (path.startsWith("/admin/ai")) return "admin ai reports"
-  if (path.startsWith("/admin/learn")) return "admin learn analytics"
-  return route.name as string
+const collapsed = ref<boolean>(storage.get(STORAGE_KEY.ADMIN_SIDER_COLLAPSED) ?? false)
+watch(collapsed, (v) => storage.set(STORAGE_KEY.ADMIN_SIDER_COLLAPSED, v))
+// 窄屏一律收起，不写回偏好 —— 手机上看一眼不该改掉桌面端的习惯
+const siderCollapsed = computed({
+  get: () => isMobile.value || collapsed.value,
+  set: (v) => {
+    if (!isMobile.value) collapsed.value = v
+  },
 })
 
+const userOptions: DropdownOption[] = [
+  { label: "回到前台", key: "home", icon: renderIcon("ph:arrow-square-out") },
+  { type: "divider", key: "d" },
+  { label: "退出登录", key: "logout", icon: renderIcon("ph:sign-out") },
+]
+
+async function onUserSelect(key: string) {
+  if (key === "home") {
+    router.push("/")
+  } else if (key === "logout") {
+    await userStore.signOut()
+    // 与前台 Header 一致：整页跳转把各个 store 里的数据清干净
+    window.location.replace("/")
+  }
+}
+
 onMounted(async () => {
   if (!storage.get(STORAGE_KEY.AUTHED)) {
     router.replace("/")
@@ -139,17 +225,109 @@ onMounted(async () => {
 
 <template>
   <n-layout has-sider position="absolute">
-    <!-- 侧边栏 -->
-    <n-layout-sider bordered :width="100" :native-scrollbar="false">
-      <!-- 菜单 -->
-      <n-menu :options="options" :value="active" />
+    <n-layout-sider
+      bordered
+      collapse-mode="width"
+      :collapsed-width="64"
+      :width="200"
+      :native-scrollbar="false"
+      :show-trigger="isMobile ? false : 'bar'"
+      v-model:collapsed="siderCollapsed"
+    >
+      <RouterLink to="/" class="brand" :class="{ collapsed: siderCollapsed }" title="回到前台">
+        <Icon icon="streamline-emojis:dog" :height="28" />
+        <span v-if="!siderCollapsed" class="brandText">后台管理</span>
+      </RouterLink>
+      <n-menu
+        :options="options"
+        :value="current?.item.path ?? null"
+        :collapsed="siderCollapsed"
+        :collapsed-width="64"
+        :collapsed-icon-size="20"
+        :indent="20"
+        :theme-overrides="{ itemHeight: '36px' }"
+      />
     </n-layout-sider>
 
-    <!-- 主内容区域 -->
     <n-layout>
-      <n-layout-content content-style="padding: 20px">
+      <n-layout-header bordered class="topbar">
+        <n-breadcrumb v-if="!isMobile">
+          <n-breadcrumb-item>后台</n-breadcrumb-item>
+          <template v-if="current">
+            <n-breadcrumb-item>{{ current.group.label }}</n-breadcrumb-item>
+            <n-breadcrumb-item>
+              <RouterLink :to="current.item.to ?? current.item.path">{{
+                current.item.label
+              }}</RouterLink>
+            </n-breadcrumb-item>
+          </template>
+        </n-breadcrumb>
+        <div v-if="isMobile" />
+        <n-flex align="center" :size="8" :wrap="false">
+          <n-button v-if="!isMobile" quaternary size="small" @click="router.push('/')">
+            <template #icon><Icon icon="ph:arrow-square-out" /></template>
+            回到前台
+          </n-button>
+          <n-button quaternary circle size="small" @click="toggleDark" title="切换明暗">
+            <template #icon>
+              <Icon :icon="isDark ? 'ph:sun' : 'ph:moon'" />
+            </template>
+          </n-button>
+          <n-dropdown
+            v-if="userStore.user"
+            :options="userOptions"
+            trigger="click"
+            @select="onUserSelect"
+          >
+            <n-button quaternary size="small">
+              <template #icon><Icon icon="ph:user-circle" /></template>
+              <template v-if="!isMobile">{{ userStore.user.username }}</template>
+            </n-button>
+          </n-dropdown>
+        </n-flex>
+      </n-layout-header>
+      <n-layout-content
+        position="absolute"
+        style="top: 49px"
+        :native-scrollbar="false"
+        content-style="padding: 20px 24px"
+      >
         <router-view></router-view>
       </n-layout-content>
     </n-layout>
   </n-layout>
 </template>
+
+<style scoped>
+.brand {
+  display: flex;
+  align-items: center;
+  gap: 10px;
+  height: 48px;
+  padding: 0 20px;
+  color: inherit;
+  text-decoration: none;
+  white-space: nowrap;
+  overflow: hidden;
+}
+
+.brand.collapsed {
+  justify-content: center;
+  padding: 0;
+}
+
+.brandText {
+  font-size: 16px;
+  font-weight: 600;
+}
+
+.topbar {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 12px;
+  height: 49px;
+  padding: 0 16px 0 24px;
+  box-sizing: border-box;
+}
+</style>

apps/web/src/utils/constants.ts

@@ -152,6 +152,7 @@ export const STORAGE_KEY = {
   LEARN_CURRENT_STEP: "learnStep",
   ADMIN_PROBLEM: "adminProblem",
   ADMIN_PROBLEM_TAGS: "adminProblemTags",
+  ADMIN_SIDER_COLLAPSED: "adminSiderCollapsed",
   DEMO_MODE: "demoMode",
   LOGIN_CLASS: "loginClass",
 }