site: add pagefind metadata for improved search ranking

Index description, keywords, and breadcrumbs as Pagefind metadata
to improve search result relevance. Configure ranking weights to
prioritize title matches and reduce term frequency bias.

- Add pagefind-meta.html partial for centralized metadata
- Move breadcrumb metadata from breadcrumbs.html to new partial
- Configure metaWeights: title (10x), keywords (6x), description (4x)

Assisted-By: cagent

layouts/_default/baseof.html

@@ -63,6 +63,7 @@
         {{ if ne .Params.sitemap false }}data-pagefind-body{{- end }}
         class="dark:bg-background-dark w-full min-w-0 bg-white p-8"
       >
+        {{ partial "pagefind-meta.html" . }}
         {{ block "main" . }}
         {{ end }}
       </div>

layouts/partials/breadcrumbs.html

@@ -1,19 +1,13 @@
 <nav
   id="breadcrumbs"
-  {{- $breadcrumbTitles := slice }}
   data-pagefind-ignore
   class="breadcrumbs mb-4 flex min-w-0 items-center gap-2 text-gray-400 dark:text-gray-300"
 >
   {{ range .Ancestors.Reverse }}
-    {{ $breadcrumbTitles = $breadcrumbTitles | append .LinkTitle }}
     <a href="{{ .Permalink }}" class="link truncate"
       >{{ markdownify .LinkTitle }}</a
     >
     <span>/</span>
   {{- end }}
-  <span
-    data-pagefind-meta="breadcrumbs:{{ collections.Delimit $breadcrumbTitles " / " }}"
-    class="truncate"
-    >{{ markdownify .LinkTitle }}</span
-  >
+  <span class="truncate">{{ markdownify .LinkTitle }}</span>
 </nav>

layouts/partials/pagefind-meta.html

@@ -0,0 +1,10 @@
+{{/* Pagefind metadata - must be inside data-pagefind-body */}}
+{{- $description := partial "utils/description.html" . -}}
+{{- $keywords := partialCached "utils/keywords.html" . . -}}
+{{- $breadcrumbs := slice -}}
+{{- range .Ancestors.Reverse -}}
+  {{- $breadcrumbs = $breadcrumbs | append .LinkTitle -}}
+{{- end -}}
+{{- with $description }}<meta data-pagefind-meta="description:{{ . }}">{{ end }}
+{{- with $keywords }}<meta data-pagefind-meta="keywords:{{ delimit . ", " }}">{{ end }}
+{{- with $breadcrumbs }}<meta data-pagefind-meta="breadcrumbs:{{ delimit . " / " }}">{{ end }}

layouts/partials/search-bar.html

@@ -23,7 +23,12 @@
       termFrequency: 0.0,
       termSimilarity: 2.0,
       pageLength: 0.0,
-      termSaturation: 1.0
+      termSaturation: 1.0,
+      metaWeights: {
+        title: 10.0,
+        description: 4.0,
+        keywords: 6.0
+      }
     }
   });