Enhance FalukantService and UI components for improved product handling

- Updated FalukantService to allow optional inclusion of productType in queries, enhancing flexibility in data retrieval.
- Modified SaleSection.vue to conditionally display product information and size, improving user experience by handling cases with no product.
- Added new German translation for 'runningNoProduct' to enhance localization support for users.

frontend/src/i18n/locales/de/falukant.json

@@ -200,6 +200,7 @@
                 "runningDirection": "Richtung",
                 "runningProduct": "Artikel",
                 "runningQuantity": "Menge",
+                "runningNoProduct": "Fahrzeugtransport",
                 "runningSource": "Quelle",
                 "runningTarget": "Ziel",
                 "runningEta": "Ankunft",
@@ -299,7 +300,7 @@
                     "actions": "Aktionen"
                 },
                 "status": {
-                    "inUse": "In Benutzung (mit Transport verknüpft)",
+                    "inUse": "In Benutzung",
                     "building": "Im Bau",
                     "free": "Verfügbar"
                 },