fix: Bug fixed für Rollen

ApiCore-Backend/prisma/schema.prisma

@@ -858,7 +858,10 @@ model Product {
 model LabelTemplate {
   id        String   @id @default(cuid())
   name      String
-  content   String
+  // Array of LabelElement objects (text/placeholder/qrCode/image/line), see
+  // label-templates.service.ts. Drives both the in-browser canvas designer
+  // and the pdfkit print renderer from the same source of truth.
+  elements  Json     @default("[]")
   widthMm   Float    @default(90)
   heightMm  Float    @default(35)
   isDefault Boolean  @default(false)