Duplicate records as drafts, and preview them from the form

The copy keeps the content, stack and team, but is unpublished, out of any
review, and gets a title marked as a copy and a free slug. It replaces
Filament's replicate action, which left the copy without a slug and still
published. The same copy is available through the API.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

lang/ca/panel.php

@@ -144,6 +144,15 @@ return [
         'select_all' => 'Selecciona-ho tot',
     ],
 
+    'duplicate' => [
+        'label' => 'Duplicar',
+        'heading' => 'Duplicar com a esborrany',
+        'hint' => 'Es crea una còpia amb el mateix contingut, sense publicar i fora de qualsevol revisió, i s\'obre per editar-la.',
+        'done' => 'Còpia creada',
+        'title_suffix' => '(còpia)',
+        'slug_suffix' => 'copia',
+    ],
+
     'permissions' => [
         'groups' => [
             'general' => 'General',
@@ -182,12 +191,6 @@ return [
         ],
     ],
 
-    'actions' => [
-        'duplicate' => 'Duplicar',
-        'duplicate_heading' => 'Duplicar aquest registre',
-        'duplicated' => 'Duplicat. Posa-li un slug i una data abans de publicar-lo.',
-    ],
-
     'preview' => [
         'label' => 'Vista prèvia',
         'heading' => 'Enllaços de vista prèvia',