Improve SEO: add site description, robots.txt, and structured data

- Add site description meta tag for search results
- Create robots.txt template with sitemap reference
- Add JSON-LD structured data (ResearchOrganization schema)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: cfortuna

hugo.toml

@@ -24,6 +24,7 @@ copyright = "SensorLab"
 
 [params]
     author = "SensorLab"
+    description = "SensorLab at Jozef Stefan Institute - Research in artificial intelligence, communications and computing."
     github = "https://github.com/sensorlab"
 
     inlineCSS = false

layouts/partials/seo.html

@@ -71,6 +71,28 @@
 {{ template "_internal/opengraph.html" . }}
 {{ template "_internal/twitter_cards.html" . }}
 
+{{/* JSON-LD structured data for better SEO */}}
+{{ if .IsHome }}
+<script type="application/ld+json">
+{
+  "@context": "https://schema.org",
+  "@type": "ResearchOrganization",
+  "name": "SensorLab",
+  "url": "{{ .Site.BaseURL }}",
+  "logo": "{{ "images/sensorlab-color.min.svg" | absURL }}",
+  "description": "{{ .Site.Params.description }}",
+  "parentOrganization": {
+    "@type": "ResearchOrganization",
+    "name": "Jozef Stefan Institute",
+    "url": "https://www.ijs.si"
+  },
+  "sameAs": [
+    "{{ .Site.Params.github }}"
+  ]
+}
+</script>
+{{ end }}
+
 <title>
     {{- if not hugo.IsProduction  }}[DEV] {{ end -}}
     {{- if not .IsHome }}{{ .Params.name | default .Title }} &mdash; {{ end -}}

layouts/robots.txt

@@ -0,0 +1,4 @@
+User-agent: *
+Allow: /
+
+Sitemap: {{ "sitemap.xml" | absURL }}