Fall back to page or site Author param in footer copyright.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

layouts/_partials/footer.html

@@ -2,7 +2,7 @@
   <div class="container py-4">
     <div class="row">
       <div class="col-md-6">
-        <p>&copy; {{ now.Year }} {{ .Site.Title }}</p>
+        <p>&copy; {{ now.Year }} {{ or (or .Params.Author .Site.Params.Author) .Site.Title }}</p>
       </div>
       <div class="col-md-6 text-md-end">
         <p>