feat(im): 添加群组管理 API 和群历史消息接口

- types.ts：新增 ImGroup 类型
- imSDK.ts：新增 createGroup / listGroups / fetchGroupHistory
- index.ts：导出 ImGroup 类型

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/im/imSDK.ts

@@ -1,7 +1,7 @@
 import { getConfig } from '../core/config'
 import { apiRequest, getToken, saveToken } from '../core/http'
 import { ImClient } from './imClient'
-import type { ChatType, ImEventListener, ImMessage, MsgType } from './types'
+import type { ChatType, ImEventListener, ImGroup, ImMessage, MsgType } from './types'
 
 let client: ImClient | null = null
 
@@ -91,4 +91,36 @@ export const ImSDK = {
   isConnected() {
     return client?.isConnected() ?? false
   },
+
+  async createGroup(name: string, memberIds: string[]): Promise<ImGroup> {
+    const config = getConfig()
+    return apiRequest<ImGroup>('/api/im/groups', {
+      method: 'POST',
+      params: { appId: config.appId },
+      body: { name, memberIds },
+    })
+  },
+
+  async listGroups(): Promise<ImGroup[]> {
+    const config = getConfig()
+    const res = await apiRequest<ImGroup[] | { content?: ImGroup[] }>('/api/im/groups', {
+      params: { appId: config.appId },
+    })
+    return Array.isArray(res) ? res : (res.content ?? [])
+  },
+
+  async fetchGroupHistory(groupId: string, page = 0, size = 50): Promise<ImMessage[]> {
+    const config = getConfig()
+    const res = await apiRequest<{ content?: ImMessage[] } | ImMessage[]>(
+      `/api/im/messages/history/${encodeURIComponent(groupId)}`,
+      {
+        params: {
+          appId: config.appId,
+          page: String(page),
+          size: String(size),
+        },
+      },
+    )
+    return Array.isArray(res) ? res : (res.content ?? [])
+  },
 }

src/im/types.ts

@@ -45,3 +45,13 @@ export interface SendMessageParams {
   content: string
   mentionedUserIds?: string
 }
+
+export interface ImGroup {
+  id: string
+  appId: string
+  name: string
+  creatorId: string
+  memberIds: string
+  adminIds: string
+  createdAt: string
+}

src/index.ts

@@ -5,7 +5,7 @@ export { XuqmSDK } from './core/sdk'
 
 export { ImSDK } from './im/imSDK'
 export { ImClient } from './im/imClient'
-export type { ImMessage, ChatType, MsgType, MsgStatus, ImEventListener, SendMessageParams } from './im/types'
+export type { ImMessage, ChatType, MsgType, MsgStatus, ImEventListener, SendMessageParams, ImGroup } from './im/types'
 
 export { PushSDK } from './push/pushSDK'
 export type { PushVendor } from './push/pushSDK'