fix(core): can't enter presentation again in share page (#7262)

Fix [TOV-916](https://linear.app/affine-design/issue/TOV-916/分享页面的-present-按钮在第二次进入演示模式时未生效)

packages/frontend/electron/renderer/app.tsx

@@ -35,6 +35,7 @@ const desktopWhiteList = [
   '/open-app/url',
   '/upgrade-success',
   '/ai-upgrade-success',
+  '/share',
 ];
 if (
   !environment.isDesktop &&