Show GN: Mark - 일반 사용자를 위한 쉽고 가벼운 Markdown 뷰어/에디터

As Markdown becomes the standard format in the AI era, Mark lowers the entry barrier for general users by providing a familiar WYSIWYG experience. The integration of Upstage's Solar Pro 3 for unlimited AI editing and multi-format parsing signifies a shift toward AI-native productivity tools that prioritize accessibility over complex technical configurations.