feat: 小程序跳转改用明文 URL Scheme

- UrlSchemeLauncher: 使用明文 Scheme 格式，无需后端 API 生成
- HomePage: 修复 path 格式，去掉开头斜杠以匹配小程序后台配置

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

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

src/views/Home/HomePage.tsx

@@ -146,7 +146,7 @@ const HomePage: React.FC = () => {
           zIndex={1000}
         >
           <MiniProgramLauncher
-            path="/pages/index/index"
+            path="pages/index/index"
             buttonStyle={{
               backgroundColor: '#07c160',
               color: '#fff',