Normalization of ä, ö,ü and ß in filters and search of duplicates

app/static/js/asset-duplicates.js

@@ -47,7 +47,14 @@
     }
 
     function normalize(value) {
-      let result = value.trim().replace(/\s+/g, ' ');
+      const sharedNormalize = window.AssetManagerNormalizeSearchText;
+      if (typeof sharedNormalize === 'function') {
+        return sharedNormalize(value, {
+          caseSensitive: !caseInsensitive.checked,
+          collapseWhitespace: true
+        });
+      }
+      let result = String(value || '').trim().replace(/\s+/g, ' ');
       if (caseInsensitive.checked) result = result.toLocaleLowerCase();
       return result;
     }