diff --git a/src/views/im/home/Index.vue b/src/views/im/home/Index.vue
new file mode 100644
index 000000000..d4778e29d
--- /dev/null
+++ b/src/views/im/home/Index.vue
@@ -0,0 +1,97 @@
+<!-- TODO @AI：文件名，是不是应该小写？ -->
+<template>
+  <!--
+    IM 外层容器：聊天模块的全屏沉浸式壳
+    - 左侧 ToolBar：头像 + 三 Tab（消息/好友/群聊）+ 底部设置
+    - 右侧 <router-view>：按路由渲染 MessagePage / FriendPage / GroupPage
+    - 挂载全局弹层：UserInfoCard / ContextMenu / ImageViewer
+  -->
+  <div class="flex w-full h-full overflow-hidden">
+    <ToolBar />
+    <!--
+      keep-alive 缓存子页面：
+      - 切 Tab 不重建组件，ChatPanel 滚动位置、输入框草稿等 UI 状态不丢
+      - Vue 3 里 keep-alive 不能直接包 <router-view>（会有警告），必须走 v-slot 拿 Component
+    -->
+    <router-view v-slot="{ Component }">
+      <keep-alive>
+        <component :is="Component" />
+      </keep-alive>
+    </router-view>
+
+    <!-- 全局弹层：由 useImUiStore 统一调度 -->
+    <!-- TODO @AI：【是不是没必要】大图预览改为 <el-image :preview-src-list> 在调用方就地承接，不再全局挂 -->
+    <UserInfoCard />
+    <ContextMenu />
+  </div>
+</template>
+
+<script lang="ts" setup>
+import { onMounted, onUnmounted, watch } from 'vue'
+
+import { useConversationStore } from './store/conversationStore'
+import { useImWebSocketStore } from './store/websocketStore'
+import { useFriendStore } from './store/friendStore'
+import { useGroupStore } from './store/groupStore'
+import { useMessagePuller } from './composables/useMessagePuller'
+import { useMessageSender } from './composables/useMessageSender'
+import { ImConversationType } from '../utils/constants'
+import ToolBar from './components/ToolBar.vue'
+import UserInfoCard from './components/UserInfoCard.vue'
+import ContextMenu from './components/ContextMenu.vue'
+
+defineOptions({ name: 'ImIndex' })
+
+const conversationStore = useConversationStore()
+const wsStore = useImWebSocketStore()
+const friendStore = useFriendStore()
+const groupStore = useGroupStore()
+const { pullOnce } = useMessagePuller()
+const { readActive, syncPrivateReadStatus } = useMessageSender()
+
+// TODO @AI：注释
+onMounted(async () => {
+  // 1. 从 IndexedDB 恢复本地会话数据（按会话分桶，需 await 以保证后续步骤拿到完整列表）
+  await conversationStore.loadConversations()
+  // 2. 建立 WebSocket 长连接（跨 Tab 持续保持，不因路由切换断开）
+  wsStore.connect()
+  // 3. 预拉好友 / 群列表：必须 await，pullOnce 内部要靠 friendStore / groupStore 补 senderNickName 和会话 name/avatar
+  await Promise.all([
+    friendStore.loadFriends().catch((e) => console.warn('[IM] 预拉好友失败', e)),
+    groupStore.loadGroups().catch((e) => console.warn('[IM] 预拉群列表失败', e))
+  ])
+  // 4. 增量拉取离线消息（私聊 + 群聊，使用各自 minId 游标）
+  await pullOnce()
+  // 5. 默认选中第一个会话（仅在消息 Tab 可见）
+  const sorted = conversationStore.getSortedConversations
+  if (sorted.length > 0 && !conversationStore.activeConversation) {
+    conversationStore.setActiveConversation(sorted[0])
+  }
+})
+
+// TODO @AI：注释
+onUnmounted(() => {
+  wsStore.disconnect()
+})
+
+/**
+ * 会话切换时自动标记为已读 + 私聊下拉对方已读位置：
+ * - 立刻清零本地未读
+ * - 同步后端已读状态；服务端会广播 READ/RECEIPT 事件通知其它端与对方
+ * - 私聊额外补一次「对方已读到哪条」，弥补离线 / 多端漏掉的 RECEIPT 推送
+ */
+watch(
+  () => conversationStore.activeConversation?.targetId,
+  async (targetId) => {
+    if (!targetId) {
+      return
+    }
+    // TODO @AI：这里增加注释
+    await readActive()
+    // TODO @AI：这里增加注释
+    if (conversationStore.activeConversation?.type === ImConversationType.PRIVATE) {
+      void syncPrivateReadStatus(targetId)
+    }
+  }
+)
+</script>