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/stores/post/hooks.ts

@@ -1,25 +1,16 @@
-/**
- * 帖子相关 React Hooks
- */
-
-import { useCallback, useEffect, useState } from 'react';
+import { useCallback, useEffect, useRef } from 'react';
 import { usePostManagerStore } from './postStore';
 import { postManager } from './PostManager';
 import type { Post } from '../../types';
 import { POST_LIST_PAGE_SIZE } from '../postListSources';
 import type { PostListTab } from '../postListSources';
 
-// ==================== usePostList ====================
-
 export interface UsePostListResult {
   posts: Post[];
   isLoading: boolean;
   refresh: () => Promise<void>;
 }
 
-/**
- * 获取帖子列表 hook
- */
 export function usePostList(
   type: PostListTab = 'hot',
   page = 1,
@@ -33,17 +24,18 @@ export function usePostList(
     const key = `list:${type}:${page}:${pageSize}`;
     return state.loadingListKeys.has(key);
   });
-  const [hasFetched, setHasFetched] = useState(false);
+  const lastFetchedRef = useRef<string | null>(null);
 
   useEffect(() => {
-    if (!hasFetched) {
-      setHasFetched(true);
+    const key = `${type}:${page}:${pageSize}`;
+    if (lastFetchedRef.current !== key) {
+      lastFetchedRef.current = key;
       usePostManagerStore.getState().setLoadingList(type, page, pageSize, true);
       postManager.getPosts(type, page, pageSize).finally(() => {
         usePostManagerStore.getState().setLoadingList(type, page, pageSize, false);
       });
     }
-  }, [type, page, pageSize, hasFetched]);
+  }, [type, page, pageSize]);
 
   const refresh = useCallback(async () => {
     usePostManagerStore.getState().setLoadingList(type, page, pageSize, true);
@@ -57,17 +49,12 @@ export function usePostList(
   return { posts, isLoading, refresh };
 }
 
-// ==================== usePostDetail ====================
-
 export interface UsePostDetailResult {
   post: Post | null;
   isLoading: boolean;
   refresh: () => Promise<Post | null>;
 }
 
-/**
- * 获取帖子详情 hook
- */
 export function usePostDetail(postId: string | undefined | null): UsePostDetailResult {
   const post = usePostManagerStore(state =>
     postId ? (state.detailsMap.get(postId)?.data ?? null) : null
@@ -75,18 +62,18 @@ export function usePostDetail(postId: string | undefined | null): UsePostDetailR
   const isLoading = usePostManagerStore(state =>
     postId ? state.loadingDetailIds.has(postId) : false
   );
-  const [hasFetched, setHasFetched] = useState(false);
+  const lastFetchedRef = useRef<string | null>(null);
 
   useEffect(() => {
     if (!postId) return;
-    if (!hasFetched) {
-      setHasFetched(true);
+    if (lastFetchedRef.current !== postId) {
+      lastFetchedRef.current = postId;
       usePostManagerStore.getState().setLoadingDetail(postId, true);
       postManager.getPostDetail(postId).finally(() => {
         usePostManagerStore.getState().setLoadingDetail(postId, false);
       });
     }
-  }, [postId, hasFetched]);
+  }, [postId]);
 
   const refresh = useCallback(async () => {
     if (!postId) return null;
@@ -99,4 +86,4 @@ export function usePostDetail(postId: string | undefined | null): UsePostDetailR
   }, [postId]);
 
   return { post, isLoading, refresh };
-}
+}