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The copy keeps the content, stack and team, but is unpublished, out of any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>

app/Filament/Resources/Projects/Pages/EditProject.php

@@ -6,6 +6,8 @@ namespace App\Filament\Resources\Projects\Pages;
 
 use App\Filament\Concerns\WarnsOfConcurrentEditing;
 use App\Filament\Resources\Projects\ProjectResource;
+use App\Filament\Support\DuplicateAction;
+use App\Filament\Support\PreviewAction;
 use Filament\Actions\DeleteAction;
 use Filament\Resources\Pages\EditRecord;
 
@@ -18,6 +20,9 @@ class EditProject extends EditRecord
     protected function getHeaderActions(): array
     {
         return [
+            // Seeing it on the real site without leaving the form.
+            PreviewAction::for('project'),
+            DuplicateAction::make(),
             DeleteAction::make(),
         ];
     }