diff --git a/apps/web/src/shared/components/Header.vue b/apps/web/src/shared/components/Header.vue
index 6a4dea5..d6901fe 100644
--- a/apps/web/src/shared/components/Header.vue
+++ b/apps/web/src/shared/components/Header.vue
@@ -40,6 +40,18 @@ const router = useRouter()
 const { isMobile, isDesktop } = useBreakpoints()
 const { learnStep } = useLearnProgress()
 
+/**
+ * 课堂求助的入口收进姓名下拉里了，顶栏只留姓名按钮上的角标 —— 老师不用展开
+ * 菜单也能看见有没有人举手。桌面端限定，教师端接单后要在弹框里替学生写代码。
+ */
+const showHelpRequests = ref(false)
+const hasHelpEntry = computed(
+  () => isDesktop.value && userStore.isTeacherOrAbove,
+)
+const pendingHelpCount = computed(() =>
+  hasHelpEntry.value ? collabStore.pendingCount : 0,
+)
+
 const isDark = useDark()
 
 /**
@@ -241,6 +253,17 @@ const menus = computed<MenuOption[]>(() => [
 ])
 
 const options = computed<Array<DropdownOption | DropdownDividerOption>>(() => [
+  {
+    label: pendingHelpCount.value
+      ? `课堂求助（${pendingHelpCount.value}）`
+      : "课堂求助",
+    key: "help",
+    show: hasHelpEntry.value,
+    icon: renderIcon("streamline-emojis:raising-hands-2"),
+    props: {
+      onClick: () => (showHelpRequests.value = true),
+    },
+  },
   {
     label: "我的主页",
     key: "home",
@@ -348,15 +371,16 @@ function handleMenuSelect(key: string) {
       >
         {{ screenMode }}
       </n-button>
-      <HelpRequestList v-if="isDesktop && userStore.isTeacherOrAbove" />
       <div v-if="userStore.isFinished">
         <n-dropdown v-if="userStore.isAuthed" :options="options" size="large">
-          <n-button>
-            <Icon :icon="avatar" height="20"></Icon>
-            <span style="padding-left: 8px">
-              {{ userStore.user!.username }}
-            </span>
-          </n-button>
+          <n-badge :value="pendingHelpCount" :max="99">
+            <n-button>
+              <Icon :icon="avatar" height="20"></Icon>
+              <span style="padding-left: 8px">
+                {{ userStore.user!.username }}
+              </span>
+            </n-button>
+          </n-badge>
         </n-dropdown>
         <n-flex align="center" v-else>
           <n-button
@@ -389,6 +413,7 @@ function handleMenuSelect(key: string) {
       整个丢弃），header 行随之丢掉 `max-width: 2000px` 那条居中样式。
       n-modal 默认 teleport 到 body，塞在这里不影响它的实际渲染位置。
     -->
+    <HelpRequestList v-if="hasHelpEntry" v-model:show="showHelpRequests" />
     <CollabModal v-if="userStore.isTeacherOrAbove" />
   </n-flex>
 </template>
diff --git a/apps/web/src/shared/components/HelpRequestList.vue b/apps/web/src/shared/components/HelpRequestList.vue
index 7b318bf..2180110 100644
--- a/apps/web/src/shared/components/HelpRequestList.vue
+++ b/apps/web/src/shared/components/HelpRequestList.vue
@@ -2,18 +2,35 @@
 import { Icon } from "@iconify/vue"
 import { useCollabStore } from "shared/store/collab"
 
+/** 由顶栏的姓名下拉菜单打开 */
+const show = defineModel<boolean>("show", { default: false })
+
 const collabStore = useCollabStore()
 
-// 等待时长要每秒走一格，所以自己转一个 now
+// 等待时长要每秒走一格，所以自己转一个 now。
+// 只在弹框开着时转 —— 这个组件跟着顶栏常驻，关着的时候没人看这个数。
 const now = ref(Date.now())
 let timer: number | null = null
-onMounted(() => {
-  timer = window.setInterval(() => (now.value = Date.now()), 1000)
-})
-onUnmounted(() => {
-  if (timer !== null) window.clearInterval(timer)
+
+function stopTimer() {
+  if (timer === null) return
+  window.clearInterval(timer)
+  timer = null
+}
+
+watch(show, (opened) => {
+  if (!opened) {
+    stopTimer()
+    return
+  }
+  now.value = Date.now()
+  if (timer === null) {
+    timer = window.setInterval(() => (now.value = Date.now()), 1000)
+  }
 })
 
+onUnmounted(stopTimer)
+
 const waited = (createdAt: number) => {
   const seconds = Math.max(0, Math.floor((now.value - createdAt) / 1000))
   const m = Math.floor(seconds / 60)
@@ -25,21 +42,19 @@ const handleAccept = (studentId: number, status: string) => {
   // 已被别的老师接走的不能点
   if (status === "active") return
   collabStore.accept(studentId)
+  // 接单后马上要弹 CollabModal，这个列表得让位
+  show.value = false
 }
 </script>
 
 <template>
-  <n-popover trigger="click" placement="bottom-end" style="padding: 0">
-    <template #trigger>
-      <n-badge :value="collabStore.pendingCount" :max="99">
-        <n-button>
-          <Icon icon="streamline-emojis:raising-hands-2" height="20" />
-          <span style="padding-left: 8px">求助</span>
-        </n-button>
-      </n-badge>
-    </template>
-
-    <div style="width: 320px; max-height: 60vh; overflow: auto; padding: 8px">
+  <n-modal
+    v-model:show="show"
+    preset="card"
+    title="课堂求助"
+    :style="{ width: '420px' }"
+  >
+    <div style="max-height: 60vh; overflow: auto">
       <n-empty v-if="collabStore.groupedRequests.length === 0" description="暂无求助" />
 
       <div v-for="group in collabStore.groupedRequests" :key="group.problemId">
@@ -94,5 +109,5 @@ const handleAccept = (studentId: number, status: string) => {
         <n-divider style="margin: 4px 0" />
       </div>
     </div>
-  </n-popover>
+  </n-modal>
 </template>