front dev update

frontend/pweb/lib/pages/report/table/row.dart

@@ -8,6 +8,13 @@ import 'package:pweb/pages/report/table/badge.dart';
 
 class OperationRow {
   static DataRow build(OperationItem op, BuildContext context) {
+    final isUnknownDate = op.date.millisecondsSinceEpoch == 0;
+    final localDate = op.date.toLocal();
+    final dateLabel = isUnknownDate
+        ? '-'
+        : '${TimeOfDay.fromDateTime(localDate).format(context)}\n'
+          '${localDate.toIso8601String().split("T").first}';
+
     return DataRow(cells: [
       DataCell(OperationStatusBadge(status: op.status)),
       DataCell(Text(op.fileName ?? '')),
@@ -16,10 +23,7 @@ class OperationRow {
       DataCell(Text(op.payId)),
       DataCell(Text(op.cardNumber ?? '-')),
       DataCell(Text(op.name)),
-      DataCell(Text(
-        '${TimeOfDay.fromDateTime(op.date).format(context)}\n'
-        '${op.date.toLocal().toIso8601String().split("T").first}',
-      )),
+      DataCell(Text(dateLabel)),
       DataCell(Text(op.comment)),
     ]);
   }