1.0.9

• Added in-app updates — the app checks GitHub for new releases and can download and install them right from Settings, with download progress and cancel
• Added an app–server compatibility check — both sides declare the version range they support, and dismissable notices on launch warn when either one should be updated to avoid issues
• Added an About section in Settings — app version and update status, the creator's GitHub profile and a link to the repository
• Added a file preview screen — shared markdown files open rendered like chat messages, from the file browser or a chat link, with save and share actions