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/App.js

@@ -59,9 +59,12 @@ import NotificationContainer from "components/NotificationContainer";
 import ConnectionStatusBar from "components/ConnectionStatusBar";
 import NotificationTestTool from "components/NotificationTestTool";
 import ScrollToTop from "components/ScrollToTop";
-import PostHogProvider from "components/PostHogProvider";
 import { logger } from "utils/logger";
 
+// PostHog Redux 集成
+import { useDispatch } from 'react-redux';
+import { initializePostHog } from "store/slices/posthogSlice";
+
 /**
  * ConnectionStatusBar 包装组件
  * 需要在 NotificationProvider 内部使用，所以单独提取
@@ -109,6 +112,13 @@ function ConnectionStatusBarWrapper() {
 
 function AppContent() {
     const { colorMode } = useColorMode();
+    const dispatch = useDispatch();
+
+    // 🎯 PostHog Redux 初始化
+    useEffect(() => {
+        dispatch(initializePostHog());
+        logger.info('App', 'PostHog Redux 初始化已触发');
+    }, [dispatch]);
 
     return (
         <Box minH="100vh" bg={colorMode === 'dark' ? 'gray.800' : 'white'}>
@@ -296,34 +306,32 @@ export default function App() {
     }, []);
 
     return (
-        <PostHogProvider>
-            <ReduxProvider store={store}>
-                <ChakraProvider
-                    theme={theme}
-                    toastOptions={{
-                        defaultOptions: {
-                            position: 'top',
-                            duration: 3000,
-                            isClosable: true,
-                        }
-                    }}
-                >
-                    <ErrorBoundary>
-                        <NotificationProvider>
-                            <AuthProvider>
-                                <AuthModalProvider>
-                                    <IndustryProvider>
-                                        <AppContent />
-                                        <AuthModalManager />
-                                        <NotificationContainer />
-                                        <NotificationTestTool />
-                                    </IndustryProvider>
-                                </AuthModalProvider>
-                        </AuthProvider>
-                    </NotificationProvider>
-                </ErrorBoundary>
-            </ChakraProvider>
-            </ReduxProvider>
-        </PostHogProvider>
+        <ReduxProvider store={store}>
+            <ChakraProvider
+                theme={theme}
+                toastOptions={{
+                    defaultOptions: {
+                        position: 'top',
+                        duration: 3000,
+                        isClosable: true,
+                    }
+                }}
+            >
+                <ErrorBoundary>
+                    <NotificationProvider>
+                        <AuthProvider>
+                            <AuthModalProvider>
+                                <IndustryProvider>
+                                    <AppContent />
+                                    <AuthModalManager />
+                                    <NotificationContainer />
+                                    <NotificationTestTool />
+                                </IndustryProvider>
+                            </AuthModalProvider>
+                    </AuthProvider>
+                </NotificationProvider>
+            </ErrorBoundary>
+        </ChakraProvider>
+        </ReduxProvider>
     );
 }