diff --git a/src/views/im/home/components/group/GroupInfo.vue b/src/views/im/home/components/group/GroupInfo.vue
new file mode 100644
index 000000000..2cf079ac1
--- /dev/null
+++ b/src/views/im/home/components/group/GroupInfo.vue
@@ -0,0 +1,142 @@
+<template>
+  <!--
+    群信息内容组件（与 UserInfo 对位）
+    - 头像 + 群名 + 成员数 + 成员宫格 + 动作区，纯展示 + 抛事件，业务由父级承接
+    - relation 走 groupStore 缓存推导：命中 = member（已加群），否则 = stranger（未加群），无 id = readonly
+    - 成员宫格仅 member 时拉取（陌生群拉不到，所有信息走 props.group 卡片快照）
+  -->
+  <div class="flex justify-center">
+    <div class="w-full max-w-[320px] flex flex-col gap-3 items-center">
+      <UserAvatar
+        :url="group.showImage || group.showImageThumb"
+        :name="group.showGroupName || group.name"
+        :size="72"
+        :clickable="false"
+        :previewable="isMember"
+      />
+      <div
+        class="w-full text-lg font-semibold leading-snug text-[var(--el-text-color-primary)] truncate text-center"
+      >
+        {{ group.showGroupName || group.name }}
+      </div>
+      <div v-if="memberCountText" class="text-13px text-[var(--el-text-color-secondary)]">
+        {{ memberCountText }}
+      </div>
+
+      <!-- 成员宫格：仅 member 渲染（陌生群拉不到成员） -->
+      <div v-if="isMember && members.length" class="flex flex-wrap gap-2 justify-center w-full pt-2">
+        <GroupMemberGrid
+          v-for="member in members"
+          :key="member.userId"
+          :member="member"
+          :group-name="group.name"
+        />
+      </div>
+
+      <!-- 动作区：member 进入群聊 / stranger 加入群聊 / readonly 不渲染 -->
+      <div v-if="isMember" class="mt-4">
+        <el-button type="primary" @click="emit('chat', group)">进入群聊</el-button>
+      </div>
+      <div v-else-if="isStranger" class="mt-4">
+        <el-button type="primary" @click="emit('apply', group)">加入群聊</el-button>
+      </div>
+    </div>
+  </div>
+</template>
+
+<script lang="ts" setup>
+import { computed, ref, watch } from 'vue'
+
+import UserAvatar from '../user/UserAvatar.vue'
+import GroupMemberGrid from './GroupMemberGrid.vue'
+import { useUserStore } from '@/store/modules/user'
+import { CommonStatusEnum } from '@/utils/constants'
+import { useFriendStore } from '../../store/friendStore'
+import { useGroupStore } from '../../store/groupStore'
+import { getMemberDisplayName } from '../../../utils/user'
+import type { Friend, GroupLite, GroupMember } from '../../types'
+import type { GroupMemberLite } from './GroupMember.vue'
+
+defineOptions({ name: 'ImGroupInfo' })
+
+const props = defineProps<{
+  group: GroupLite
+}>()
+
+const emit = defineEmits<{
+  /** member 点「进入群聊」；父级负责切会话 + 关浮层 */
+  chat: [group: GroupLite]
+  /** stranger 点「加入群聊」；父级负责弹申请理由 + 调 applyJoinGroup */
+  apply: [group: GroupLite]
+}>()
+
+const userStore = useUserStore()
+const groupStore = useGroupStore()
+const friendStore = useFriendStore()
+
+const members = ref<GroupMemberLite[]>([])
+
+/**
+ * 是否已加群：基于"自己确实在成员列表里"判断
+ * - 缓存未命中：直接 false（陌生群）
+ * - 命中且 members 已拉：精准查 self.userId 在不在
+ * - 命中但 members 未拉：fetchGroups 接口语义即「我加入的群」，命中视为 member（拉成员后会自动收敛）
+ */
+const isMember = computed(() => {
+  if (!props.group?.id) {
+    return false
+  }
+  const cached = groupStore.getGroup(props.group.id)
+  if (!cached) {
+    return false
+  }
+  if (cached.membersLoaded && cached.members) {
+    const myId = Number(userStore.getUser?.id) || 0
+    return cached.members.some(
+      (m) => m.userId === myId && m.status === CommonStatusEnum.ENABLE
+    )
+  }
+  return true
+})
+/** 是否未加群：有 id 但 isMember 不成立；对比 isMember 用于动作区按钮分支 */
+const isStranger = computed(() => !!props.group?.id && !isMember.value)
+
+/** 成员数文案：member 优先用本地拉到的列表长度，stranger 用 props.group.memberCount 卡片快照 */
+const memberCountText = computed(() => {
+  const count = isMember.value
+    ? props.group.memberCount || members.value.length
+    : props.group.memberCount
+  return count ? `${count} 位成员` : ''
+})
+
+/** member 切群 / 首挂：拉成员；竞态用 group.id 比对丢弃陈旧响应避免上一条群成员错位 */
+watch(
+  () => [props.group?.id, isMember.value] as const,
+  async ([id, member]) => {
+    members.value = []
+    if (!id || !member) {
+      return
+    }
+    const list = await groupStore.fetchGroupMembers(id)
+    if (props.group?.id !== id) {
+      return
+    }
+    members.value = list.map((m) =>
+      convertGroupMemberLite(m, friendStore.getFriend(m.userId))
+    )
+  },
+  { immediate: true }
+)
+
+/** 群成员 → 列表项 */
+function convertGroupMemberLite(member: GroupMember, friend: Friend | undefined): GroupMemberLite {
+  return {
+    userId: member.userId,
+    showName: getMemberDisplayName(member, friend),
+    nickname: member.nickname,
+    avatar: member.avatar,
+    status: member.status,
+    role: member.role
+  }
+}
+</script>
diff --git a/src/views/im/home/components/group/GroupInfoCard.vue b/src/views/im/home/components/group/GroupInfoCard.vue
new file mode 100644
index 000000000..c91c19c8a
--- /dev/null
+++ b/src/views/im/home/components/group/GroupInfoCard.vue
@@ -0,0 +1,96 @@
+<template>
+  <!--
+    群信息浮层（与 UserInfoCard 对位）
+    - 仅承担「浮层定位 + 关闭逻辑（点遮罩 / Esc）」，群信息视觉走 <GroupInfo>，与通讯录详情共用一份组件
+    - 触发：useImUiStore.openGroupInfoCardAtEvent(group, e)
+    - GroupInfo 内部按 groupStore 缓存推导 member / stranger，浮层只负责接 chat / apply 事件做业务
+  -->
+  <teleport to="body">
+    <div v-if="card.show" class="fixed inset-0 z-9998" @click.self="handleClose">
+      <div
+        class="fixed w-80 p-4 bg-[var(--el-bg-color-overlay)] rounded-md shadow-xl"
+        :style="{ left: card.position.x + 'px', top: card.position.y + 'px' }"
+        @click.stop
+      >
+        <GroupInfo v-if="card.group" :group="card.group" @chat="handleChat" @apply="handleApply" />
+      </div>
+    </div>
+  </teleport>
+</template>
+
+<script lang="ts" setup>
+import { computed, onMounted, onUnmounted } from 'vue'
+import { useRouter } from 'vue-router'
+import { ElMessage, ElMessageBox } from 'element-plus'
+
+import GroupInfo from './GroupInfo.vue'
+import { useImUiStore } from '../../store/uiStore'
+import { useConversationStore } from '../../store/conversationStore'
+import { useGroupStore } from '../../store/groupStore'
+import { applyJoinGroup } from '@/api/im/group/request'
+import { ImConversationType, ImGroupAddSource } from '../../../utils/constants'
+import type { GroupLite } from '../../types'
+
+defineOptions({ name: 'ImGroupInfoCard' })
+
+const uiStore = useImUiStore()
+const conversationStore = useConversationStore()
+const groupStore = useGroupStore()
+const router = useRouter()
+
+const card = computed(() => uiStore.groupInfoCard)
+
+/** 关闭浮层 */
+function handleClose() {
+  uiStore.closeGroupInfoCard()
+}
+
+/** Esc 关闭 */
+function handleKeydown(e: KeyboardEvent) {
+  if (e.key === 'Escape' && card.value.show) {
+    handleClose()
+  }
+}
+
+onMounted(() => window.addEventListener('keydown', handleKeydown))
+onUnmounted(() => window.removeEventListener('keydown', handleKeydown))
+
+/** 进入群聊：取本地最新群信息（含 silent / 群备注），新建或激活会话 + 跳路由 */
+function handleChat(group: GroupLite) {
+  const cached = groupStore.getGroup(group.id)
+  conversationStore.openConversation(
+    group.id,
+    ImConversationType.GROUP,
+    cached?.name || group.name || '',
+    cached?.avatar || group.showImage || '',
+    { silent: !!cached?.silent }
+  )
+  if (router.currentRoute.value.name !== 'ImHomeConversation') {
+    router.push({ name: 'ImHomeConversation' })
+  }
+  handleClose()
+}
+
+/** 加入群聊：先关浮层（避免与 prompt 的 mask 互相遮挡）→ 弹申请理由（可选）→ applyJoinGroup */
+async function handleApply(group: GroupLite) {
+  handleClose()
+  let applyContent = ''
+  try {
+    const result = await ElMessageBox.prompt(`申请加入「${group.name || ''}」`, '申请加群', {
+      confirmButtonText: '发送申请',
+      cancelButtonText: '取消',
+      inputPlaceholder: '请填写验证消息（可选）',
+      inputValue: ''
+    })
+    applyContent = (result.value || '').trim()
+  } catch {
+    return
+  }
+  await applyJoinGroup({
+    groupId: group.id,
+    applyContent: applyContent || undefined,
+    addSource: ImGroupAddSource.SHARE_LINK
+  })
+  ElMessage.success('加群申请已发送')
+}
+</script>
diff --git a/src/views/im/home/pages/contact/GroupDetail.vue b/src/views/im/home/pages/contact/GroupDetail.vue
index 9bb21afbb..25d9cdf9b 100644
--- a/src/views/im/home/pages/contact/GroupDetail.vue
+++ b/src/views/im/home/pages/contact/GroupDetail.vue
@@ -1,98 +1,25 @@
 <template>
   <!--
     通讯录 - 群聊详情
-    - 头像 + 群名 + 成员数 + 成员宫格 + "进入群聊"，纯展示不做群管理
-    - 成员列表按 group.id 懒拉，组件内部维护；切换群时清空避免上一条群成员闪现
+    - 内容走共享 <GroupInfo>，与 GroupInfoCard 浮层用同一份组件
+    - 通讯录里都是已加群（GroupInfo 内部按 groupStore 推导）；chat 抛上去由父级承接
   -->
-  <div class="flex justify-center pt-12 px-6">
-    <div class="w-full max-w-[320px] flex flex-col gap-3 items-center">
-      <UserAvatar
-        :url="group.showImage || group.showImageThumb"
-        :name="group.showGroupName || group.name"
-        :size="72"
-        :clickable="false"
-        previewable
-      />
-      <div
-        class="text-lg font-semibold leading-snug text-[var(--el-text-color-primary)] truncate w-full text-center"
-      >
-        {{ group.showGroupName || group.name }}
-      </div>
-      <div class="text-13px text-[var(--el-text-color-secondary)]"> {{ memberCount }} 位成员 </div>
-      <!-- 成员宫格：纯展示，宽度跟着 320 容器自动换行；不带"邀请 +"瓦片 -->
-      <div class="flex flex-wrap gap-2 justify-center w-full pt-2">
-        <!-- 注意！！！加好友话术里的群名一律用 group.name（原始名）；showGroupName 是我自定义的群备注，不能带给对端 -->
-        <GroupMemberGrid
-          v-for="member in members"
-          :key="member.userId"
-          :member="member"
-          :group-name="group.name"
-        />
-      </div>
-      <div class="mt-4">
-        <el-button type="primary" @click="emit('chat', group)">进入群聊</el-button>
-      </div>
-    </div>
+  <div class="pt-12 px-6">
+    <GroupInfo :group="group" @chat="emit('chat', $event)" />
   </div>
 </template>
 
 <script lang="ts" setup>
-import { computed, ref, watch } from 'vue'
-
-import UserAvatar from '../../components/user/UserAvatar.vue'
-import GroupMemberGrid from '../../components/group/GroupMemberGrid.vue'
-import type { Friend, GroupLite, GroupMember } from '../../types'
-import type { GroupMemberLite } from '../../components/group/GroupMember.vue'
-import { useFriendStore } from '../../store/friendStore'
-import { useGroupStore } from '../../store/groupStore'
-import { getMemberDisplayName } from '../../../utils/user'
+import GroupInfo from '../../components/group/GroupInfo.vue'
+import type { GroupLite } from '../../types'
 
 defineOptions({ name: 'ImContactGroupDetail' })
 
-const props = defineProps<{
+defineProps<{
   group: GroupLite
 }>()
 
 const emit = defineEmits<{
   chat: [group: GroupLite]
 }>()
-
-const groupStore = useGroupStore()
-const friendStore = useFriendStore()
-
-const members = ref<GroupMemberLite[]>([])
-
-/** 群人数文案：优先后端 memberCount，其次按已拉到的列表长度兜底；都没有给 0 */
-const memberCount = computed(() => props.group.memberCount || members.value.length || 0)
-
-/** 切换群 / 首挂：拉成员；竞态用 group.id 比对丢弃陈旧响应避免上一条群成员错位 */
-watch(
-  () => props.group?.id,
-  async (id) => {
-    members.value = []
-    if (!id) {
-      return
-    }
-    const list = await groupStore.fetchGroupMembers(id)
-    if (props.group?.id !== id) {
-      return
-    }
-    members.value = list.map((member) =>
-      convertGroupMemberLite(member, friendStore.getFriend(member.userId))
-    )
-  },
-  { immediate: true }
-)
-
-/** 群成员 → 列表项 */
-function convertGroupMemberLite(member: GroupMember, friend: Friend | undefined): GroupMemberLite {
-  return {
-    userId: member.userId,
-    showName: getMemberDisplayName(member, friend),
-    nickname: member.nickname,
-    avatar: member.avatar,
-    status: member.status,
-    role: member.role
-  }
-}
 </script>
diff --git a/src/views/im/home/pages/conversation/components/conversation/ConversationGroupSide.vue b/src/views/im/home/pages/conversation/components/conversation/ConversationGroupSide.vue
index e1f8f14fe..6be42eecd 100644
--- a/src/views/im/home/pages/conversation/components/conversation/ConversationGroupSide.vue
+++ b/src/views/im/home/pages/conversation/components/conversation/ConversationGroupSide.vue
@@ -700,7 +700,10 @@ async function handleQuit() {
   }
   const groupId = props.group.id
   await quitGroup(groupId)
-  // 同步清本地：会话列表 + 群 store；不清的话冷启动前还会残留这条群 / 会话
+  // 本地立即响应：先把 self.member 置 DISABLE（让 GroupInfo 等 isMember 收敛），再清会话 + 群 store
+  if (myId.value) {
+    groupStore.updateMemberStatus(groupId, myId.value, CommonStatusEnum.DISABLE)
+  }
   conversationStore.removeConversation(ImConversationType.GROUP, groupId)
   groupStore.removeGroup(groupId)
   message.success('已退出群聊')
diff --git a/src/views/im/home/store/groupStore.ts b/src/views/im/home/store/groupStore.ts
index 6e0ac6ada..d94ee0aa0 100644
--- a/src/views/im/home/store/groupStore.ts
+++ b/src/views/im/home/store/groupStore.ts
@@ -15,6 +15,7 @@ import {
 import { useConversationStore } from './conversationStore'
 import { useGroupRequestStore } from './groupRequestStore'
 import { ImConversationType, ImGroupMemberRole, ImMessageType } from '../../utils/constants'
+import { CommonStatusEnum } from '@/utils/constants'
 import {
   getCurrentUserId,
   imStorage,
@@ -453,6 +454,17 @@ export const useGroupStore = defineStore('imGroupStore', {
       this.saveGroupMembers(groupId)
     },
 
+    /** 本地更新群成员的 status（自己退群 / 被踢的本地预置；让 isMember 立即收敛到 stranger，不依赖 removeGroup 的整群移除） */
+    updateMemberStatus(groupId: number, userId: number, status: number) {
+      const group = this.getGroup(groupId)
+      const member = group?.members?.find((m) => m.userId === userId)
+      if (!member || member.status === status) {
+        return
+      }
+      member.status = status
+      this.saveGroupMembers(groupId)
+    },
+
     /** 本地更新群成员的 displayUserName（GROUP_MEMBER_NICKNAME_UPDATE 事件）；不命中则等 fetchGroupMembers 兜底 */
     updateMemberDisplayUserName(groupId: number, userId: number, displayUserName: string) {
       const group = this.getGroup(groupId)
@@ -574,7 +586,7 @@ export const useGroupStore = defineStore('imGroupStore', {
     },
 
     /** 创建群广播：创建者多端同步 + 初始成员 bootstrap；payload.memberUserIds 含自己 → 拉群详情 / 成员；本端发起者已经 upsert 过本群，跳过避免双拉 */
-    applyGroupCreateNotification(groupId: number, payload: GroupNotificationPayload) {
+    async applyGroupCreateNotification(groupId: number, payload: GroupNotificationPayload) {
       if (!isSelfInPayloadMembers(payload)) {
         return
       }
@@ -583,7 +595,8 @@ export const useGroupStore = defineStore('imGroupStore', {
       if (selfIsOperator && this.getGroup(groupId)) {
         return
       }
-      this.fetchGroupInfo(groupId).catch(() => undefined)
+      // 先 await fetchGroupInfo 把群 upsert 进 state.groups；否则 fetchGroupMembers 的「不是我加入的群」guard 会兜空
+      await this.fetchGroupInfo(groupId)
       this.fetchGroupMembers(groupId, true).catch(() => undefined)
     },
 
@@ -611,36 +624,43 @@ export const useGroupStore = defineStore('imGroupStore', {
     },
 
     /** 成员加入：被邀请者本端 group 未就位先 fetchGroupInfo bootstrap；所有人都刷成员列表（新成员 nickname / avatar 不在 payload） */
-    applyGroupMemberInviteNotification(groupId: number, payload: GroupNotificationPayload) {
+    async applyGroupMemberInviteNotification(groupId: number, payload: GroupNotificationPayload) {
+      // 自己刚被拉进来：必须 await fetchGroupInfo 让群入 state.groups，否则 fetchGroupMembers 的 guard 会兜空
       if (isSelfInPayloadMembers(payload) && !this.getGroup(groupId)) {
-        this.fetchGroupInfo(groupId).catch(() => undefined)
+        await this.fetchGroupInfo(groupId)
       }
       this.fetchGroupMembers(groupId, true).catch(() => undefined)
     },
 
     /** 自由进群：进群者本端 group 未就位先 fetchGroupInfo bootstrap；所有人都刷成员列表 */
-    applyGroupMemberEnterNotification(groupId: number, payload: GroupNotificationPayload) {
+    async applyGroupMemberEnterNotification(groupId: number, payload: GroupNotificationPayload) {
       const selfUserId = getCurrentUserId()
+      // 自己自由进群：必须 await fetchGroupInfo 让群入 state.groups，否则 fetchGroupMembers 的 guard 会兜空
       if (selfUserId && payload.entrantUserId === selfUserId && !this.getGroup(groupId)) {
-        this.fetchGroupInfo(groupId).catch(() => undefined)
+        await this.fetchGroupInfo(groupId)
       }
       this.fetchGroupMembers(groupId, true).catch(() => undefined)
     },
 
-    /** 成员退群：退群者本人多端同步走 removeGroup；其他成员从本地列表移除 quitter */
+    /** 成员退群：退群者本人先把 self.status 置 DISABLE 再 removeGroup（保留状态语义 + 维持 groups 列表干净）；其他成员从本地列表移除 quitter */
     applyGroupMemberQuitNotification(groupId: number, payload: GroupNotificationPayload) {
       const selfUserId = getCurrentUserId()
       if (selfUserId && payload.operatorUserId === selfUserId) {
+        this.updateMemberStatus(groupId, selfUserId, CommonStatusEnum.DISABLE)
         this.removeGroup(groupId)
       } else if (payload.operatorUserId) {
         this.removeMembersLocal(groupId, [payload.operatorUserId])
       }
     },
 
-    /** 成员被移出：被踢者本人 removeGroup；其他成员从本地列表移除被踢者 */
+    /** 成员被移出：被踢者本人先把 self.status 置 DISABLE 再 removeGroup；其他成员从本地列表移除被踢者 */
     applyGroupMemberKickNotification(groupId: number, payload: GroupNotificationPayload) {
       const memberIds = payload.memberUserIds || []
+      const selfUserId = getCurrentUserId()
       if (isSelfInPayloadMembers(payload)) {
+        if (selfUserId) {
+          this.updateMemberStatus(groupId, selfUserId, CommonStatusEnum.DISABLE)
+        }
         this.removeGroup(groupId)
       } else if (memberIds.length) {
         this.removeMembersLocal(groupId, memberIds)