- Enhanced normalizeRichText() to detect and preserve HTML from HTML editors
- Added renderRichText() helper to safely render HTML vs plain text content
- Updated 4 rendering locations (narrative sections, systemic exams, investigations)
- Backward compatible: plain textarea fields still work correctly
- Fixes issue where strip_tags() removed all HTML formatting from editor content
Resolves blank discharge summaries in PDF when content saved from TinyMCE/HTML editors
