I built a lightweight Markdown editor (~15 MB) with live preview, KaTeX, and Mermaid support

Hey r/markdown! I've been working on SoloMD, a cross-platform Markdown editor focused on simplicity. Key features: Live preview (markers hide when cursor leaves the line) KaTeX math rendering ($E=mc^2$) Mermaid diagrams Focus mode & typewriter mode Export to HTML/PDF/DOCX Multi-encoding support...