- Add React.lazy code splitting for all 15 tool pages
- Fix WCAG AA contrast issues (304 text color fixes)
- Add ARIA labels and aria-expanded to navigation buttons
- Add aria-live for error announcements in tools
- Implement responsive ad layout:
- Desktop (≥1280px): Right sidebar with 3 ad units
- Tablet (1024-1279px): Bottom section with 3 horizontal units
- Mobile (<1024px): Fixed bottom banner
- Add TabletAdSection component for tablet ad placement
- Integrate Onidel affiliate partnership
- Update all Adsterra domains to solutionbiologyisle.com
- Add release notes for 2026-02-18 updates
- Added new Markdown Editor with live preview, GFM support, PDF/HTML/DOCX export
- Upgraded all paste fields to CodeMirror with syntax highlighting and expand/collapse
- Enhanced Object Editor with advanced URL fetching and preview mode
- Improved export views with syntax highlighting in Table/Object editors
- Implemented SEO improvements (FAQ schema, breadcrumbs, internal linking)
- Added Related Tools recommendations component
- Created custom 404 page with tool suggestions
- Consolidated tools: removed JSON, Serialize, CSV-JSON (merged into main editors)
- Updated documentation and cleaned up redundant files
- Updated release notes with user-centric improvements
