fix: harden editorial brand rendering and SEO

layouts/partials/cta-button.html

@@ -15,6 +15,10 @@
 {{- $text := .text | default "Visit Casino" -}}
 {{- $style := .style | default "primary" -}}
 {{- $size := .size | default "" -}}
+{{- $affiliateURL := $brand.affiliateBaseUrl | default "" -}}
+{{- $siteURL := strings.TrimSuffix "/" $page.Site.BaseURL -}}
+{{- $targetURL := strings.TrimSuffix "/" $affiliateURL -}}
+{{- if and $affiliateURL (ne $targetURL $siteURL) -}}
 
 {{- $subid := .subid | default "" -}}
 {{- if not $subid -}}
@@ -27,7 +31,7 @@
 {{- if not $subid -}}{{- $subid = $page.Type -}}{{- end -}}
 {{- if or (eq $subid "_index") (eq $subid "") -}}{{- $subid = "home" -}}{{- end -}}
 
-{{- $href := printf "%s?%s=%s" $brand.affiliateBaseUrl $brand.affiliateSubIdParam $subid -}}
+{{- $href := printf "%s?%s=%s" $affiliateURL $brand.affiliateSubIdParam $subid -}}
 
 {{- $classes := "btn-primary" -}}
 {{- if eq $style "secondary" -}}{{- $classes = "btn-secondary" -}}{{- end -}}
@@ -37,3 +41,4 @@
 {{- with .class -}}{{- $classes = printf "%s %s" $classes . -}}{{- end -}}
 
 <a href="{{ $href }}" class="{{ $classes }}" rel="sponsored nofollow noopener" target="_blank" data-affiliate data-subid="{{ $subid }}">{{ $text }}</a>
+{{- end -}}