refs #26324 [fid] Remove empty and duplicate links on electronic resolver links (JOP)

* reuse snippet from bbi

themes/fid/templates/ajax/resolverLinks.phtml

@@ -11,10 +11,21 @@
  *
  * modified for fid:
  * - hide no-Resolver-Content-Message
+ * - remove empty and duplicate links from electronic resources (copied from bbi) #26324
  *
  * configured in: --
  */
 ?>
+<?php
+// fid: Remove empty and duplicate links (determined by href, not title, which can be duplicate) #26324
+$hrefs = [];
+$this->electronic = array_filter($this->electronic ?? [], function ($link) use (&$hrefs) {
+    if (!empty($link['href']) && !in_array($link['href'], $hrefs)) {
+        $hrefs[] = $link['href'];
+        return true;
+    }
+});
+?>
 <div>
   <?php if (!empty($this->electronic)): ?>
     <div class="openurls">