Allow heading tags (h1-h6) in ContentSanitizer so news editor headings render

app/Http/Controllers/Studio/StudioArtworksApiController.php

@@ -18,6 +18,7 @@ use App\Services\TagService;
 use App\Services\ArtworkVersioningService;
 use App\Services\Studio\StudioArtworkQueryService;
 use App\Services\Studio\StudioBulkActionService;
+use App\Support\ArtworkDescriptionContentValidator;
 use App\Services\Tags\TagDiscoveryService;
 use App\Services\Worlds\WorldSubmissionService;
 use Carbon\Carbon;
@@ -164,6 +165,8 @@ final class StudioArtworksApiController extends Controller
             'evolution_note' => 'sometimes|nullable|string|max:1200',
         ]);
 
+        $this->ensureValidArtworkDescription($validated);
+
         $hasAttributionUpdates = array_key_exists('group', $validated)
             || array_key_exists('primary_author_user_id', $validated)
             || array_key_exists('contributor_user_ids', $validated)
@@ -326,6 +329,15 @@ final class StudioArtworksApiController extends Controller
         ]);
     }
 
+    private function ensureValidArtworkDescription(array $validated): void
+    {
+        foreach (ArtworkDescriptionContentValidator::errors($validated['description'] ?? null) as $message) {
+            throw ValidationException::withMessages([
+                'description' => [$message],
+            ]);
+        }
+    }
+
     public function evolutionOptions(Request $request, int $id): JsonResponse
     {
         $artwork = $request->user()->artworks()->findOrFail($id);