refactor(message): replace MessageStateManager with zustand store

- Remove MessageStateManager wrapper layer in favor of direct zustand store
- Move service modules to services/ subdirectory (ConversationOperations, MessageDeduplication, MessageSendService, MessageSyncService, ReadReceiptManager, UserCacheService, WSMessageHandler)
- Add new zustand-based store with subscriptionManager for event handling
- Introduce React hooks for message state (useConversations, useMessages, useUnreadCount, etc.)
- Update exports in index.ts to reflect new module structure
- Deprecate messageManager.ts entry point in favor of message/index.ts
- Maintain backward compatibility with existing MessageManager API

src/stores/message/index.ts

@@ -1,12 +1,27 @@
 /**
  * 消息模块统一导出
  * 
- * 提供向后兼容的 API 导出
+ * 重构说明：
+ * - 移除了 MessageStateManager 包装层
+ * - 直接使用 zustand store 进行状态管理
+ * - 服务层移至 services/ 目录
+ * - 新增 hooks.ts 封装常用逻辑
  */
 
 // ==================== 主管理器 ====================
 export { messageManager, MessageManager } from './MessageManager';
 
+// ==================== 状态管理 ====================
+export {
+  useMessageStore,
+  subscriptionManager,
+  normalizeConversationId,
+  mergeMessagesById,
+  notifySubscribers,
+  subscribeToMessages,
+} from './store';
+export type { MessageState, MessageActions, MessageStore } from './store';
+
 // ==================== 类型导出 ====================
 // 从 types.ts 导出所有类型
 export type {
@@ -17,6 +32,7 @@ export type {
   ReadStateRecord,
   MessageManagerConversationListDeps,
   HandleNewMessageOptions,
+  // 服务接口类型（保留向后兼容，但服务层已不再使用）
   IMessageStateManager,
   IMessageDeduplication,
   IUserCacheService,
@@ -37,30 +53,57 @@ export {
   MIN_RECONNECT_SYNC_INTERVAL,
 } from './constants';
 
-// ==================== 子模块导出（可选使用）====================
-// 状态管理器
-export { MessageStateManager, messageStateManager } from './MessageStateManager';
+// ==================== 服务导出 ====================
+export {
+  // 消息去重服务
+  MessageDeduplication,
+  messageDeduplication,
+  
+  // 用户缓存服务
+  UserCacheService,
+  userCacheService,
+  
+  // 已读回执管理器
+  ReadReceiptManager,
+  
+  // 会话操作服务
+  ConversationOperations,
+  
+  // 消息发送服务
+  MessageSendService,
+  
+  // 消息同步服务
+  MessageSyncService,
+  
+  // WebSocket 消息处理器
+  WSMessageHandler,
+} from './services';
 
-// 消息去重服务
-export { MessageDeduplication, messageDeduplication } from './MessageDeduplication';
-
-// 用户缓存服务
-export { UserCacheService, userCacheService } from './UserCacheService';
-
-// 已读回执管理器
-export { ReadReceiptManager } from './ReadReceiptManager';
-
-// 会话操作服务
-export { ConversationOperations } from './ConversationOperations';
-
-// 消息发送服务
-export { MessageSendService } from './MessageSendService';
-
-// 消息同步服务
-export { MessageSyncService } from './MessageSyncService';
-
-// WebSocket 消息处理器
-export { WSMessageHandler } from './WSMessageHandler';
+// ==================== Hooks 导出 ====================
+export {
+  // 会话相关
+  useConversations,
+  useConversation,
+  useCreateConversation,
+  useUpdateConversation,
+  useActiveConversation,
+  
+  // 消息相关
+  useMessages,
+  useSendMessage,
+  useMarkAsRead,
+  
+  // 未读数相关
+  useUnreadCount,
+  useSystemUnreadCount,
+  
+  // 群聊相关
+  useGroupTyping,
+  useGroupMuted,
+  
+  // 通用
+  useMessageManager,
+} from './hooks';
 
 // ==================== 默认导出 ====================
 export { default } from './MessageManager';