Add Open Graph, Twitter card and structured data to the docs - #269
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The site emitted no og:, twitter: or JSON-LD tags at all, so a link shared on LinkedIn, Bluesky or Slack rendered as a bare URL. overrides/main.html now fills the extrahead block with Open Graph and Twitter card tags, plus a SoftwareApplication JSON-LD block on the home page. Titles and descriptions reuse the per-page front matter from #268 and fall back to the site-wide values, so all 17 pages get a distinct card. Adds a 1200x630 social card image. og:image and og:url are built from site_url rather than the url filter: scrapers do not resolve relative paths. Two Zensical details worth recording: the template engine treats missing values as errors, so every page.meta access is guarded, and page.is_homepage is never set - the home page is identified by an empty page.url plus a canonical_url, which also excludes 404.html.
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The site emitted no og:, twitter: or JSON-LD tags at all, so a link shared on LinkedIn, Bluesky or Slack rendered as a bare URL.
overrides/main.html now fills the extrahead block with Open Graph and Twitter card tags, plus a SoftwareApplication JSON-LD block on the home page. Titles and descriptions reuse the per-page front matter from #268 and fall back to the site-wide values, so all 17 pages get a distinct card. Adds a 1200x630 social card image.
og:image and og:url are built from site_url rather than the url filter: scrapers do not resolve relative paths.
Two Zensical details worth recording: the template engine treats missing values as errors, so every page.meta access is guarded, and page.is_homepage is never set - the home page is identified by an empty page.url plus a canonical_url, which also excludes 404.html.