diff --git a/src/im/useIm.ts b/src/im/useIm.ts
index 512602a..e53a6e7 100644
--- a/src/im/useIm.ts
+++ b/src/im/useIm.ts
@@ -1,4 +1,4 @@
-import { ref, shallowRef, onUnmounted } from 'vue'
+import { ref, shallowRef, onUnmounted, reactive, type Ref } from 'vue'
 import { ImClient } from './ImClient'
 import {
   deleteConversation,
@@ -28,13 +28,49 @@ import {
 import type {
   ConversationView,
   HistoryQuery,
+  ImGroup,
   ImMessage,
   PageResult,
   SendMessageParams,
   ChatType,
+  FriendRequest,
+  GroupJoinRequest,
 } from '../types'
 
-export function useIm() {
+export interface UseImReturn {
+  connect: () => void
+  send: (params: SendMessageParams) => ImMessage
+  revoke: (msgId: string) => Promise<ImMessage>
+  edit: (msgId: string, content: string) => Promise<ImMessage>
+  disconnect: () => void
+  messages: Ref<ImMessage[]>
+  conversations: Ref<ConversationView[]>
+  connected: Ref<boolean>
+  error: Ref<Event | null>
+  refreshConversations: () => Promise<void>
+  loadHistory: (toId: string, query?: HistoryQuery) => Promise<PageResult<ImMessage>>
+  loadGroupHistory: (groupId: string, query?: HistoryQuery) => Promise<PageResult<ImMessage>>
+  jumpToMessagePage: (toId: string, messageId: string, pageSize?: number, maxPages?: number) => Promise<ImMessage[] | null>
+  jumpToGroupMessagePage: (groupId: string, messageId: string, pageSize?: number, maxPages?: number) => Promise<ImMessage[] | null>
+  setConversationRead: (targetId: string, chatType?: ChatType) => Promise<void>
+  setConversationPinnedState: (targetId: string, chatType: ChatType, pinned: boolean) => Promise<void>
+  setConversationMutedState: (targetId: string, chatType: ChatType, muted: boolean) => Promise<void>
+  setConversationDraft: (targetId: string, chatType: ChatType, draft: string) => Promise<void>
+  removeConversation: (targetId: string, chatType: ChatType) => Promise<void>
+  getFriends: () => Promise<string[]>
+  getGroups: () => Promise<ImGroup[]>
+  getGroup: (groupId: string) => Promise<ImGroup>
+  sendFriend: (toUserId: string, remark?: string) => Promise<FriendRequest>
+  loadFriendRequests: (direction?: 'incoming' | 'outgoing') => Promise<FriendRequest[]>
+  approveFriendRequest: (requestId: string) => Promise<FriendRequest>
+  declineFriendRequest: (requestId: string) => Promise<FriendRequest>
+  sendGroupJoin: (groupId: string, remark?: string) => Promise<GroupJoinRequest>
+  loadGroupJoinRequests: (groupId: string) => Promise<GroupJoinRequest[]>
+  approveGroupJoinRequest: (groupId: string, requestId: string) => Promise<GroupJoinRequest>
+  declineGroupJoinRequest: (groupId: string, requestId: string) => Promise<GroupJoinRequest>
+}
+
+export function useIm(): UseImReturn {
   const client = shallowRef<ImClient | null>(null)
   const messages = ref<ImMessage[]>([])
   const conversations = ref<ConversationView[]>([])
@@ -220,7 +256,7 @@ export function useIm() {
 
   onUnmounted(disconnect)
 
-  return {
+  return reactive({
     connect,
     send,
     revoke,
@@ -251,5 +287,5 @@ export function useIm() {
     loadGroupJoinRequests,
     approveGroupJoinRequest,
     declineGroupJoinRequest,
-  }
+  }) as UseImReturn
 }
diff --git a/src/types/index.ts b/src/types/index.ts
index 2e78a4e..1526599 100644
--- a/src/types/index.ts
+++ b/src/types/index.ts
@@ -18,6 +18,8 @@ export type MsgType =
   | 'RICH_TEXT'
   | 'CALL_AUDIO'
   | 'CALL_VIDEO'
+  | 'QUOTE'
+  | 'MERGE'
   | 'REVOKED'
   | 'FORWARD'
 
@@ -39,6 +41,7 @@ export interface ImMessage {
   groupReadCount?: number
   revoked?: boolean
   createdAt: string
+  editedAt?: string | null
 }
 
 export interface ConversationView {