fixes before build

lib/widgets/discounted_price.dart

@@ -0,0 +1,37 @@
+/// Paid amount, with the pre-discount price struck through when there is one.
+library;
+
+import 'package:flutter/material.dart';
+
+import '../models/line_item.dart';
+import '../utils/money.dart';
+
+class DiscountedPrice extends StatelessWidget {
+  const DiscountedPrice({super.key, required this.item});
+
+  final LineItem item;
+
+  @override
+  Widget build(BuildContext context) {
+    final theme = Theme.of(context);
+    final paid = Text(
+      formatEuro(item.price),
+      style: theme.textTheme.titleMedium,
+    );
+    if (!item.hasDiscount) return paid;
+
+    return Row(
+      mainAxisSize: MainAxisSize.min,
+      children: [
+        Text(
+          formatEuro(item.originalPrice),
+          style: theme.textTheme.bodyMedium?.copyWith(
+            decoration: TextDecoration.lineThrough,
+          ),
+        ),
+        const SizedBox(width: 8),
+        paid,
+      ],
+    );
+  }
+}