- Add CSS custom properties for brand colors
- Remove global font-weight: bold from body
- Increase content panel opacity from 0.6 to 0.88
- Add dynamic lang attribute, favicon, and Open Graph meta tags
- Move scripts to <head> with defer (required due to automagic-images plugin)
- Disable automagic-images plugin (PHPHtmlParser strips all <script src> tags
during HTML re-serialization, breaking Bootstrap JS and all dropdowns)
- Add loading="lazy" to below-fold images across templates
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>