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/services/backgroundService.ts

@@ -11,7 +11,7 @@
 import { AppState, AppStateStatus, Platform } from 'react-native';
 import * as BackgroundFetch from 'expo-background-fetch';
 import * as TaskManager from 'expo-task-manager';
-import { sseService } from './sseService';
+import { wsService } from './wsService';
 import {
   triggerVibration,
   vibrateOnMessage,
@@ -36,8 +36,8 @@ let appStateSubscription: any = null;
 TaskManager.defineTask(BACKGROUND_FETCH_TASK, async () => {
   try {
     // 检查 SSE 连接状态
-    if (!sseService.isConnected()) {
-      await sseService.connect();
+    if (!wsService.isConnected()) {
+      await wsService.connect();
     }
     
     // 返回收到新数据
@@ -51,8 +51,8 @@ TaskManager.defineTask(BACKGROUND_FETCH_TASK, async () => {
 // SSE 保活任务
 TaskManager.defineTask(REALTIME_KEEPALIVE_TASK, async () => {
   try {
-    if (!sseService.isConnected()) {
-      await sseService.connect();
+    if (!wsService.isConnected()) {
+      await wsService.connect();
     }
     return BackgroundFetch.BackgroundFetchResult.NewData;
   } catch (error) {
@@ -120,8 +120,8 @@ function setupAppStateListener(): void {
     void nextAppState;
     if (nextAppState === 'active') {
       // App 回到前台，确保连接
-      if (!sseService.isConnected()) {
-        sseService.connect();
+      if (!wsService.isConnected()) {
+        wsService.connect();
       }
     }
   });