feat: 实现的功能 Home 页面追踪（2个事件）

**Home 页面**:
1. **页面访问** - 了解流量来源、登录转化率
2. **功能卡片点击** - 识别最受欢迎的功能
3. **推荐功能效果** - 分析特色功能（新闻中心）的点击率

src/views/Home/HomePage.js

@@ -1,5 +1,5 @@
 // src/views/Home/HomePage.js - 专业投资分析平台
-import React, { useEffect } from 'react';
+import React, { useEffect, useCallback } from 'react';
 import {
   Box,
   Container,
@@ -21,10 +21,13 @@ import heroBg from '../../assets/img/BackgroundCard1.png';
 import '../../styles/home-animations.css';
 import { logger } from '../../utils/logger';
 import MidjourneyHeroSection from '../Community/components/MidjourneyHeroSection';
+import { usePostHogTrack } from '../../hooks/usePostHogRedux';
+import { ACQUISITION_EVENTS } from '../../lib/constants';
 
 export default function HomePage() {
   const { user, isAuthenticated } = useAuth(); // ⚡ 移除 isLoading，不再依赖它
   const navigate = useNavigate();
+  const { track } = usePostHogTrack(); // PostHog 追踪
   const [imageLoaded, setImageLoaded] = React.useState(false);
 
   // 响应式配置
@@ -46,6 +49,15 @@ export default function HomePage() {
     });
   }, [user?.id, isAuthenticated]); // 只依赖 user.id,避免无限循环
 
+  // 🎯 PostHog 追踪：页面浏览
+  useEffect(() => {
+    track(ACQUISITION_EVENTS.LANDING_PAGE_VIEWED, {
+      timestamp: new Date().toISOString(),
+      is_authenticated: isAuthenticated,
+      user_id: user?.id || null,
+    });
+  }, [track, isAuthenticated, user?.id]);
+
   // 核心功能配置 - 5个主要功能
   const coreFeatures = [
     {
@@ -106,15 +118,25 @@ export default function HomePage() {
   ];
 
   // @TODO 如何区分内部链接和外部链接？
-  const handleProductClick = (url) => {
+  const handleProductClick = useCallback((feature) => {
-    if (url.startsWith('http')) {
+    // 🎯 PostHog 追踪：功能卡片点击
+    track(ACQUISITION_EVENTS.FEATURE_CARD_CLICKED, {
+      feature_id: feature.id,
+      feature_title: feature.title,
+      feature_url: feature.url,
+      is_featured: feature.featured || false,
+      link_type: feature.url.startsWith('http') ? 'external' : 'internal',
+    });
+
+    // 原有导航逻辑
+    if (feature.url.startsWith('http')) {
       // 外部链接，直接打开
-      window.open(url, '_blank');
+      window.open(feature.url, '_blank');
     } else {
       // 内部路由
-      navigate(url);
+      navigate(feature.url);
     }
-  };
+  }, [track, navigate]);
 
   return (
     <Box>
@@ -273,7 +295,7 @@ export default function HomePage() {
                         borderRadius="full"
                         fontWeight="bold"
                         w={{ base: '100%', md: 'auto' }}
-                        onClick={() => handleProductClick(coreFeatures[0].url)}
+                        onClick={() => handleProductClick(coreFeatures[0])}
                         minH="44px"
                         flexShrink={0}
                       >
@@ -305,7 +327,7 @@ export default function HomePage() {
                           borderColor: `${feature.color}.400`,
                           transform: 'translateY(-2px)'
                         }}
-                        onClick={() => handleProductClick(feature.url)}
+                        onClick={() => handleProductClick(feature)}
                         minH={{ base: 'auto', md: '180px' }}
                       >
                       <CardBody p={{ base: 5, md: 6 }}>
@@ -343,7 +365,7 @@ export default function HomePage() {
                             minH="44px"
                             onClick={(e) => {
                               e.stopPropagation();
-                              handleProductClick(feature.url);
+                              handleProductClick(feature);
                             }}
                           >
                             使用