feat: 从 React Context 迁移到 Redux，实现了：

1. ✅ 集中式状态管理 - PostHog 状态与应用状态统一管理
  2. ✅ 自动追踪机制 - Middleware 自动拦截 Redux actions 进行追踪
  3. ✅ Redux DevTools 支持 - 可视化调试所有 PostHog 事件
  4. ✅ 离线事件缓存 - 网络恢复时自动刷新缓存事件
  5. ✅ 性能优化 Hooks - 提供轻量级 Hook 避免不必要的重渲染

src/store/index.js

@@ -1,18 +1,25 @@
 // src/store/index.js
 import { configureStore } from '@reduxjs/toolkit';
 import communityDataReducer from './slices/communityDataSlice';
+import posthogReducer from './slices/posthogSlice';
+import posthogMiddleware from './middleware/posthogMiddleware';
 
 export const store = configureStore({
   reducer: {
-    communityData: communityDataReducer
+    communityData: communityDataReducer,
+    posthog: posthogReducer, // ✅ PostHog Redux 状态管理
   },
   middleware: (getDefaultMiddleware) =>
     getDefaultMiddleware({
       serializableCheck: {
         // 忽略这些 action types 的序列化检查
-        ignoredActions: ['communityData/fetchPopularKeywords/fulfilled', 'communityData/fetchHotEvents/fulfilled'],
+        ignoredActions: [
+          'communityData/fetchPopularKeywords/fulfilled',
+          'communityData/fetchHotEvents/fulfilled',
+          'posthog/trackEvent/fulfilled', // ✅ PostHog 事件追踪
+        ],
       },
-    }),
+    }).concat(posthogMiddleware), // ✅ PostHog 自动追踪中间件
 });
 
 export default store;