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/core/usecases/ProcessMessageUseCase.ts

@@ -6,6 +6,7 @@
 
 import { messageRepository, userCacheRepository, CachedMessage } from '@/database';
 import { wsClient, WSEventType } from '../../data/datasources/WSClient';
+import { MessageMapper } from '@/data/mappers';
 import {
   Message,
   Conversation,
@@ -50,7 +51,7 @@ interface ReadStateRecord {
   timestamp: number;
   version: number;
   lastReadSeq: number;
-  clearTimer?: NodeJS.Timeout;
+  clearTimer?: ReturnType<typeof setTimeout>;
 }
 
 class ProcessMessageUseCase {
@@ -596,16 +597,9 @@ class ProcessMessageUseCase {
         );
 
         // 保存到本地
-        await messageRepository.saveMessagesBatch(serverMessages.map((m: any) => ({
-          id: m.id,
-          conversationId: m.conversation_id || conversationId,
-          senderId: m.sender_id,
-          seq: m.seq,
-          segments: m.segments || [],
-          createdAt: m.created_at,
-          status: m.status || 'normal',
-          isRead: false,
-        })));
+        await messageRepository.saveMessagesBatch(
+          MessageMapper.toCachedMessages(serverMessages, conversationId)
+        );
 
         return serverMessages;
       }
@@ -639,17 +633,9 @@ class ProcessMessageUseCase {
           })
         );
 
-        // 保存到本地
-        await messageRepository.saveMessagesBatch(messages.map((m: any) => ({
-          id: m.id,
-          conversationId: m.conversation_id || conversationId,
-          senderId: m.sender_id,
-          seq: m.seq,
-          segments: m.segments || [],
-          createdAt: m.created_at,
-          status: m.status || 'normal',
-          isRead: false,
-        })));
+        await messageRepository.saveMessagesBatch(
+          MessageMapper.toCachedMessages(response.messages, conversationId)
+        );
 
         return messages;
       }