* feat: Add Markdown to PDF conversion functionality
- Implement dual-panel interface with live preview
- Support 3 Markdown flavors: GitHub, CommonMark, Pandoc
- Add file upload support for .md files
- Implement image quality settings (High/Medium/Low)
- Add professional user messaging and error handling
- Support all common Markdown elements (headers, lists, tables, code blocks, etc.)
- Add automatic navigation back to tool after completion
Resolves#37
* fix: improve markdown to PDF conversion with math support and better rendering
- Add KaTeX support for mathematical expressions (inline and block math)
- Fix horizontal separator rendering with improved CSS
- Enhance table rendering with proper borders and cell styling
- Replace CDN dependencies with local KaTeX installation
- Add comprehensive math preprocessing for $...$ and 20112...20112 syntax
- Improve markdown preview with real-time math rendering
- Update UI placeholder text with math examples
- Add fallback rendering for math expressions when KaTeX fails
Resolves issues with:
- Horizontal separators not rendering properly
- Tables missing borders and proper structure
- Mathematical expressions not displaying correctly
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Co-authored-by: syazkun <mohamadsyazwan193@gmail.com>
