Refactor MemberTransferSettingsView to use a computed property for the import template placeholder text, improving localization handling and avoiding issues with vue-i18n placeholders.

frontend/src/views/MemberTransferSettingsView.vue

@@ -143,7 +143,7 @@
                 v-model="importTemplate"
                 rows="8"
                 class="form-textarea import-area"
-                :placeholder="$t('memberTransfer.importTemplatePlaceholder')"
+                :placeholder="importTemplatePlaceholderText"
               ></textarea>
               <button
                 type="button"
@@ -375,6 +375,11 @@ address={{address}}`;
       return this.$t('memberTransfer.templateDescription').replace('{0}', '{{firstName}}');
     },
     
+    importTemplatePlaceholderText() {
+      // Verwende den Placeholder-Text direkt, um Probleme mit vue-i18n Platzhaltern zu vermeiden
+      return `Fügen Sie hier ein vollständiges Beispiel-Template ein, z.B.:\n{\n  "members": [\n    {\n      "firstName": "Max",\n      "lastName": "Mustermann",\n      "email": "max@example.com"\n    }\n  ]\n}`;
+    },
+    
     templatePlaceholder() {
       if (this.config.transferFormat === 'json') {
         return '{"firstName": "{{firstName}}", "lastName": "{{lastName}}", "geburtsdatum": "{{geburtsdatum}}", "email": "{{email}}", "phone": "{{phone}}", "address": "{{address}}"}';