Fix issue #5542 Sorting by name

Replace <=> with Collator for better accented character handling
Using <=> with strtolower() can misorder accented characters (e.g., "é" after "z"), making it less reliable for some languages. Collator from intl ensures precise, locale-aware string comparisons.

Author: bernardo-campos

app/Sorting/SortSetOperationComparisons.php

@@ -11,13 +11,27 @@
  */
 class SortSetOperationComparisons
 {
+    protected static function getCollator(): ?\Collator
+    {
+        $locale = user()->getLocale()->isoLocale();
+        return class_exists(\Collator::class) ? collator_create($locale) : null;
+    }
+
     public static function nameAsc(Entity $a, Entity $b): int
     {
+        $collator = self::getCollator();
+        if ($collator) {
+            return $collator->compare($a->name, $b->name);
+        }
         return strtolower($a->name) <=> strtolower($b->name);
     }
 
     public static function nameDesc(Entity $a, Entity $b): int
     {
+        $collator = self::getCollator();
+        if ($collator) {
+            return $collator->compare($b->name, $a->name);
+        }
         return strtolower($b->name) <=> strtolower($a->name);
     }
 

composer.json

@@ -13,6 +13,7 @@
         "ext-dom": "*",
         "ext-fileinfo": "*",
         "ext-gd": "*",
+        "ext-intl": "*",
         "ext-json": "*",
         "ext-mbstring": "*",
         "ext-xml": "*",