Mutualiser les calculs SEO du head

layouts/partials/seo/image.html

@@ -1,4 +1,17 @@
-{{- $socialImage := partial "head/social-image.html" . -}}
+{{- $page := . -}}
+{{- $data := dict -}}
+{{- if reflect.IsMap . -}}
+  {{- with index . "Page" -}}
+    {{- $page = . -}}
+  {{- end -}}
+  {{- with index . "Data" -}}
+    {{- $data = . -}}
+  {{- end -}}
+{{- end -}}
+{{- if eq (len $data) 0 -}}
+  {{- $data = partialCached "head/data.html" $page $page.RelPermalink -}}
+{{- end -}}
+{{- $socialImage := index $data "socialImage" -}}
 {{- $openGraphImage := $socialImage.openGraph -}}
 {{- $image := dict -}}
 {{- with $openGraphImage.url -}}