fix: 修复微信内浏览器移动端检测问题

- isMobileDevice() 添加微信浏览器检测（micromessenger）
- 确保微信内浏览器使用 URL Scheme 跳转小程序

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

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

src/components/MiniProgramLauncher/hooks/useWechatEnvironment.js

@@ -43,12 +43,15 @@ export const isMobileDevice = () => {
   // 方式4：Safari 特定检测（iOS Safari 不会在 UA 中包含 "Mobile" 但会有 "Safari"）
   const isSafariMobile = /Safari/i.test(ua) && /Apple/i.test(navigator.vendor) && touchCheck;
 
-  const result = uaCheck || (touchCheck && screenCheck) || isSafariMobile;
+  // 方式5：微信浏览器检测（微信内必定是移动端）
+  const isWechat = ua.toLowerCase().includes('micromessenger');
+
+  const result = uaCheck || (touchCheck && screenCheck) || isSafariMobile || isWechat;
 
   // 调试日志（仅在开发环境）
   if (process.env.NODE_ENV === 'development') {
     console.log('[isMobileDevice] UA:', ua);
-    console.log('[isMobileDevice] uaCheck:', uaCheck, 'touchCheck:', touchCheck, 'screenCheck:', screenCheck, 'isSafariMobile:', isSafariMobile);
+    console.log('[isMobileDevice] uaCheck:', uaCheck, 'touchCheck:', touchCheck, 'screenCheck:', screenCheck, 'isSafariMobile:', isSafariMobile, 'isWechat:', isWechat);
     console.log('[isMobileDevice] result:', result);
   }