- Add og:type, og:url, og:title, og:description, og:image, og:site_name meta tags
- Add twitter:card, twitter:title, twitter:description, twitter:image meta tags
- Add canonical URL link element
- Use social-image.png for social preview image
- Update document.title dynamically when modal opens/closes
- Resolve resource titles from JSON data files instead of raw filenames
- Handle skill/hook folder path mismatches for title lookup
- Change title separator from '-' to '|' for consistency
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>