refactor(core): introduce EventBus and refactor store infrastructure

- Add EventBus for decoupled event-driven communication between services
- Add EventSubscriber component for centralized event handling
- Add requestDedupe utility for shared request deduplication
- Refactor api/wsService to use eventBus instead of direct router navigation
- Extract MessageMapper.toCachedMessages for consistent message mapping
- Remove deprecated BaseManager and CacheBus classes
- Improve @mention rendering with memberMap support in segment rendering
- Update hooks to use useRef instead of useState for fetch tracking

src/services/api.ts

@@ -6,11 +6,10 @@
  */
 
 import AsyncStorage from '@react-native-async-storage/async-storage';
-import { CommonActions } from '@react-navigation/native';
 import Constants from 'expo-constants';
 import { Platform } from 'react-native';
 
-import { hrefVerificationGuide } from '../navigation/hrefs';
+import { eventBus } from '@/core/events/EventBus';
 
 // 生产地址 https://bbs.littlelan.cn
 const getBaseUrl = () => {
@@ -74,37 +73,27 @@ interface JwtPayload {
 // API 客户端类
 class ApiClient {
   private baseUrl: string;
-  private navigation: any = null;
-  private expoRouter: any = null;
   private verificationModalShown = false;
-  // 刷新锁：防止并发刷新
   private refreshLock: Promise<boolean> | null = null;
 
   constructor(baseUrl: string) {
     this.baseUrl = baseUrl;
   }
 
-  setExpoRouter(router: any) {
-    this.expoRouter = router;
-  }
-
   private handleVerificationRequired() {
     if (this.verificationModalShown) return;
     this.verificationModalShown = true;
-    if (this.expoRouter) {
-      this.expoRouter.push(hrefVerificationGuide());
-    }
+    eventBus.emit({ type: 'SHOW_VERIFICATION_MODAL' });
     setTimeout(() => {
       this.verificationModalShown = false;
     }, 3000);
   }
 
-  // 设置导航对象（用于处理401跳转）
-  setNavigation(navigation: any) {
-    this.navigation = navigation;
+  private navigateToLogin() {
+    eventBus.emit({ type: 'NAVIGATE', payload: { path: '/(auth)/login' } });
+    eventBus.emit({ type: 'AUTH_LOGOUT' });
   }
 
-  // 解析 JWT token 获取 payload
   private parseJwt(token: string): JwtPayload | null {
     try {
       const parts = token.split('.');
@@ -208,19 +197,10 @@ class ApiClient {
       if (this.isTokenExpiringSoon(token)) {
         const refreshed = await this.refreshToken();
         if (!refreshed) {
-          // 刷新失败，清除 token 并跳转登录
           await this.clearToken();
-          if (this.navigation) {
-            this.navigation.dispatch(
-              CommonActions.reset({
-                index: 0,
-                routes: [{ name: 'Login' }],
-              })
-            );
-          }
+          this.navigateToLogin();
           throw new ApiError(401, '登录已过期，请重新登录');
         }
-        // 刷新成功，使用新 token
         const newToken = await this.getToken();
         if (newToken) {
           headers['Authorization'] = `Bearer ${newToken}`;
@@ -246,23 +226,13 @@ class ApiClient {
       
       // 处理 401 未授权
       if (response.status === 401) {
-        // 尝试刷新 token
         const refreshed = await this.refreshToken();
         if (!refreshed) {
-          // 刷新失败，清除 token 并跳转登录
           await this.clearToken();
-          if (this.navigation) {
-            this.navigation.dispatch(
-              CommonActions.reset({
-                index: 0,
-                routes: [{ name: 'Login' }],
-              })
-            );
-          }
+          this.navigateToLogin();
           throw new ApiError(401, '登录已过期，请重新登录');
         }
         
-        // 刷新成功后重试请求
         return this.request(method, path, params, body);
       }
 

src/services/webrtc/WebRTCManager.ts

@@ -38,8 +38,8 @@ class WebRTCManager {
   // ICE restart 相关状态
   private reconnectAttempts = 0;
   private readonly MAX_RECONNECT_ATTEMPTS = 3;
-  private reconnectTimer: NodeJS.Timeout | null = null;
-  private disconnectTimer: NodeJS.Timeout | null = null;
+  private reconnectTimer: ReturnType<typeof setTimeout> | null = null;
+  private disconnectTimer: ReturnType<typeof setTimeout> | null = null;
 
   async initialize(iceServers: ICEServer[] = []): Promise<void> {
     if (this.peerConnection) {

src/services/wsService.ts

@@ -1,7 +1,7 @@
 import { AppState, AppStateStatus } from 'react-native';
 
 import { api, WS_URL } from './api';
-import { hrefVerificationGuide } from '../navigation/hrefs';
+import { eventBus } from '@/core/events/EventBus';
 import { MessageCategory, SystemMessageType, SystemMessageExtraData, MessageSegment } from '../types/dto';
 import { systemNotificationService } from './systemNotificationService';
 
@@ -300,8 +300,8 @@ class WebSocketService {
   private reconnectAttempts = 0;
   private maxReconnectAttempts = 20;
   private reconnectDelay = 3000;
-  private reconnectTimer: NodeJS.Timeout | null = null;
-  private heartbeatTimer: NodeJS.Timeout | null = null;
+  private reconnectTimer: ReturnType<typeof setTimeout> | null = null;
+  private heartbeatTimer: ReturnType<typeof setTimeout> | null = null;
   private heartbeatInterval = 30000; // 30秒心跳
   private messageHandlers: Map<WSMessageType, MessageHandler[]> = new Map();
   private connectionHandlers: ConnectionHandler[] = [];
@@ -318,7 +318,7 @@ class WebSocketService {
 
   // 降级状态
   private isFallbackMode = false;
-  private fallbackCheckTimer: NodeJS.Timeout | null = null;
+  private fallbackCheckTimer: ReturnType<typeof setTimeout> | null = null;
 
   private getWSUrl(token: string | null): string {
     return `${WS_URL}?token=${encodeURIComponent(token || '')}`;
@@ -1122,20 +1122,12 @@ class WebSocketService {
   private handleVerificationRequired(): void {
     if (this.verificationModalShown) return;
     this.verificationModalShown = true;
-    if (this.routerRef) {
-      this.routerRef.push(hrefVerificationGuide());
-    }
+    eventBus.emit({ type: 'SHOW_VERIFICATION_MODAL' });
     setTimeout(() => {
       this.verificationModalShown = false;
     }, 3000);
   }
 
-  private routerRef: any = null;
-
-  setRouter(router: any): void {
-    this.routerRef = router;
-  }
-
   private startHeartbeat(): void {
     this.stopHeartbeat();
     this.heartbeatTimer = setInterval(() => {