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The copy keeps the content, stack and team, but is unpublished, out of any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/en/panel.php

@@ -144,6 +144,15 @@ return [
         'select_all' => 'Select all',
     ],
 
+    'duplicate' => [
+        'label' => 'Duplicate',
+        'heading' => 'Duplicate as a draft',
+        'hint' => 'A copy with the same content is made, unpublished and out of any review, and opened for editing.',
+        'done' => 'Copy made',
+        'title_suffix' => '(copy)',
+        'slug_suffix' => 'copy',
+    ],
+
     'permissions' => [
         'groups' => [
             'general' => 'General',
@@ -182,12 +191,6 @@ return [
         ],
     ],
 
-    'actions' => [
-        'duplicate' => 'Duplicate',
-        'duplicate_heading' => 'Duplicate this record',
-        'duplicated' => 'Duplicated. Give it a slug and a date before publishing it.',
-    ],
-
     'preview' => [
         'label' => 'Preview',
         'heading' => 'Preview links',