new feature: Error code 507 will return if you want to delete a loan that has not been returned

FrontendV2/src/pages/MyLoansPage.tsx

@@ -84,6 +84,14 @@ export const MyLoansPage = () => {
       });
 
       if (!res.ok) {
+        if (res.status === 507) {
+          setMsgStatus("error");
+          setMsgTitle(t("error"));
+          setMsgDescription(t("error-deleting-loan-507"));
+          setIsMsg(true);
+          return;
+        }
+
         setMsgStatus("error");
         setMsgTitle(t("error"));
         setMsgDescription(t("error-deleting-loan"));

FrontendV2/src/utils/i18n/locales/de/de.json

@@ -93,5 +93,6 @@
     "try-naas": "Klick mich",
     "naas-error": "Fehler mit no-as-a-service",
     "naas-error-desc": "Ein Fehler ist beim Kommunizieren mit no-as-a-service aufgetreten.",
-    "naas-header": "Eine gute Möglichkeit, nein zu sagen..."
+    "naas-header": "Eine gute Möglichkeit, nein zu sagen...",
+    "error-deleting-loan-507": "Die Ausleihe kann nicht gelöscht werden, da sie noch nicht zurückgegeben wurde."
 }

FrontendV2/src/utils/i18n/locales/en/en.json

@@ -93,5 +93,6 @@
     "try-naas": "Click me",
     "naas-error": "Error with no-as-a-service",
     "naas-error-desc": "An error occurred while communicating with no-as-a-service.",
-    "naas-header": "A good way to say no..."
+    "naas-header": "A good way to say no...",
+    "error-deleting-loan-507": "The loan cannot be deleted because it has not been returned yet."
 }