• Open files via URL scheme — Other apps and the OS can now open a file directly in Astro Editor with astro-editor://open?path=<file>. The app launches if it isn't running, switches to the file's project if needed, and opens it ready to edit. Should work across macOS, Windows, and Linux.
• Copy as Slug — A small "Copy as slug" link now appears under title fields in the frontmatter panel. This generates a URL-friendly slug from the title and copies it to your clipboard. Will likely be replaced with a better "New File" system once I get to that work.