feat: bulk delete in product archive (v0.327)

- Add bulk_delete_permanent() endpoint (POST ids[], returns JSON)
- Checkbox column + bulk action bar with count label
- Select-all in table header, confirmation dialog before delete
- 2 new tests for bulk_delete_permanent method signature

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

autoload/admin/Controllers/ProductArchiveController.php

@@ -92,6 +92,7 @@ class ProductArchiveController
                 . $skuEanHtml;
 
             $rows[] = [
+                '_checkbox' => '<input type="checkbox" class="js-bulk-check" value="' . $id . '" aria-label="Zaznacz produkt">',
                 'lp' => $lp++ . '.',
                 'product' => $productCell,
                 'price_brutto' => $priceBrutto !== '' ? $priceBrutto : '-',
@@ -123,6 +124,7 @@ class ProductArchiveController
 
         $viewModel = new \admin\ViewModels\Common\PaginatedTableViewModel(
             [
+                ['key' => '_checkbox', 'label' => '', 'class' => 'text-center table-col-bulk-check', 'sortable' => false, 'raw' => true],
                 ['key' => 'lp', 'label' => 'Lp.', 'class' => 'text-center', 'sortable' => false],
                 ['key' => 'product', 'sort_key' => 'name', 'label' => 'Nazwa', 'sortable' => true, 'raw' => true],
                 ['key' => 'price_brutto', 'sort_key' => 'price_brutto', 'label' => 'Cena', 'class' => 'text-center', 'sortable' => true],
@@ -190,4 +192,40 @@ class ProductArchiveController
         header( 'Location: /admin/product_archive/list/' );
         exit;
     }
+
+    public function bulk_delete_permanent(): void
+    {
+        header( 'Content-Type: application/json; charset=utf-8' );
+
+        $rawIds = isset( $_POST['ids'] ) && is_array( $_POST['ids'] ) ? $_POST['ids'] : [];
+        $ids = [];
+        foreach ( $rawIds as $raw ) {
+            $id = (int) $raw;
+            if ( $id > 0 ) {
+                $ids[] = $id;
+            }
+        }
+
+        if ( empty( $ids ) ) {
+            echo json_encode( ['success' => false, 'message' => 'Nie wybrano żadnych produktów.'] );
+            exit;
+        }
+
+        $deleted = 0;
+        $errors  = [];
+        foreach ( $ids as $id ) {
+            if ( $this->productRepository->delete( $id ) ) {
+                $deleted++;
+            } else {
+                $errors[] = $id;
+            }
+        }
+
+        echo json_encode( [
+            'success' => empty( $errors ),
+            'deleted' => $deleted,
+            'errors'  => $errors,
+        ] );
+        exit;
+    }
 }