Import/Export

lib/features/igel/data/export_service.dart

@@ -39,7 +39,7 @@ class IgelExportService {
     // Immer frisch laden
     final igelList = await igelRepo.list();
 
-    final sep = ';';
+    const sep = ';';
     final sb = StringBuffer();
 
     // Kopfzeile – nur Felder, die deine Models wirklich haben

lib/features/igel/data/igel_repository.dart

@@ -19,7 +19,7 @@ class IgelRepository {
       DateTime? rescuedAt,
       String? location}) async {
     String? fmtDate(DateTime? d) =>
-        d == null ? null : d.toIso8601String().split('T').first;
+        d?.toIso8601String().split('T').first;
     final res = await api.post<dynamic>('/igel', {
       'name': name,
       'note': note,
@@ -53,7 +53,7 @@ class IgelRepository {
       DateTime? rescuedAt,
       String? location}) async {
     String? fmtDate(DateTime? d) =>
-        d == null ? null : d.toIso8601String().split('T').first;
+        d?.toIso8601String().split('T').first;
     final body = {
       'name': name,
       'note': note,