feat: 首页添加小程序入口按钮（仅移动端显示）

- 右上角固定定位，导航栏下方
- 微信绿色圆角按钮
- PC 端自动隐藏

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

src/views/Home/HomePage.tsx

@@ -14,6 +14,8 @@ import type { Feature } from '@/types/home';
 import { HeroHeader } from './components/HeroHeader';
 import { FeaturedFeatureCard } from './components/FeaturedFeatureCard';
 import { FeatureCard } from './components/FeatureCard';
+import MiniProgramLauncher from '@/components/MiniProgramLauncher';
+import { isMobileDevice } from '@/components/MiniProgramLauncher/hooks/useWechatEnvironment';
 import '@/styles/home-animations.css';
 
 /**
@@ -79,6 +81,9 @@ const HomePage: React.FC = () => {
   // 其他功能
   const regularFeatures = CORE_FEATURES.slice(1);
 
+  // 移动端判断（用于显示小程序入口）
+  const isMobile = isMobileDevice();
+
   return (
     <Box>
       {/* Hero Section - 深色科技风格 */}
@@ -131,6 +136,31 @@ const HomePage: React.FC = () => {
           </VStack>
         </Container>
       </Box>
+
+      {/* 移动端右上角固定按钮 - 小程序入口 */}
+      {isMobile && (
+        <Box
+          position="fixed"
+          top="70px"
+          right="16px"
+          zIndex={1000}
+        >
+          <MiniProgramLauncher
+            path="/pages/index/index"
+            buttonStyle={{
+              backgroundColor: '#07c160',
+              color: '#fff',
+              padding: '8px 16px',
+              fontSize: '14px',
+              fontWeight: '500',
+              borderRadius: '20px',
+              boxShadow: '0 2px 8px rgba(7, 193, 96, 0.3)',
+            }}
+          >
+            小程序
+          </MiniProgramLauncher>
+        </Box>
+      )}
     </Box>
   );
 };