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The copy keeps the content, stack and team, but is unpublished, out of any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

routes/api.php

@@ -18,6 +18,7 @@ use App\Http\Controllers\Api\V1\BatchController;
 use App\Http\Controllers\Api\V1\CallController;
 use App\Http\Controllers\Api\V1\CategoryController;
 use App\Http\Controllers\Api\V1\ClientController;
+use App\Http\Controllers\Api\V1\DuplicateController;
 use App\Http\Controllers\Api\V1\HealthController;
 use App\Http\Controllers\Api\V1\MaintenanceController;
 use App\Http\Controllers\Api\V1\MeController;
@@ -298,6 +299,10 @@ Route::prefix('v1')->name('api.v1.')->group(function () {
             Route::post("{$resource}/{{$parameter}}/preview", [PreviewController::class, 'store'])
                 ->defaults('content', $resource)
                 ->name("{$resource}.preview");
+
+            Route::post("{$resource}/{{$parameter}}/duplicate", [DuplicateController::class, 'store'])
+                ->defaults('content', $resource)
+                ->name("{$resource}.duplicate");
         }
 
         // The library. A file is uploaded here and then referenced from a