refactor(WebSocket): migrate from SSE to WebSocket for real-time messaging

- Replaced SSEClient with WSClient for handling real-time messaging.
- Updated ProcessMessageUseCase to initialize WebSocket listeners.
- Refactored messageService to prioritize WebSocket for sending messages, with fallback to HTTP.
- Removed sseService and adjusted imports across the application to utilize wsService.
- Enhanced message handling and connection management for improved performance and reliability.

src/stores/message/index.ts

@@ -12,8 +12,8 @@ export type { MessageState, MessageEvent, MessageSubscriber, MessageEventType }
 // 导出同步服务
 export { messageSyncService, MessageSyncService } from './MessageSyncService';
 
-// 导出SSE处理器
-export { sseMessageHandler, SSEMessageHandler } from './SSEMessageHandler';
+// 导出WS处理器
+export { wsMessageHandler, WSMessageHandler } from './WSMessageHandler';
 
 // 导出已读管理器
 export { readReceiptManager, ReadReceiptManager } from './ReadReceiptManager';