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/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(() => {