- One robots.txt at root referencing two sitemaps
- One central sitemap.xml with all pages (no per-site sitemaps)
- Deleted: 4 per-site sitemap templates, 4 per-site robots.txt files
- Simplified sitemap template (uses collections.all)
- sitemap.njk: remove site.pathPrefix (page.url already includes it in Eleventy v3)
- base.njk: prefix CSS paths with site.pathPrefix so sub-sites load their own theme
- Add site.pathPrefix to infra, smarthome, code, retro configs
- Update shared sitemap template to use pathPrefix
- Hub has no prefix, subdirectories get /infra/, /smarthome/, etc.