- layouts/partials/head.html: full <head> partial with meta partials + CSS pipeline
- layouts/partials/meta/seo.html: canonical URL + robots directives
- layouts/partials/meta/og.html: Open Graph + Twitter Card meta tags
- layouts/partials/meta/ai-disclosure.html: AI content disclosure (EU AI Act)
- layouts/partials/meta/json-ld.html: Schema.org JSON-LD structured data
- layouts/partials/tag-nav.html: site-wide tag cloud partial
- layouts/_default/baseof.html: simplified to use partial head.html
- layouts/_default/single.html: removed inline head block (now in head.html)
Verified: canonical, robots, OG tags, ai-content-disclosure on live pages.
96 pages build clean.
Closes: asw#15
