A whole lot of stuff

test/receipts_screen_test.dart

@@ -65,6 +65,69 @@ void main() {
     expect(find.text('Red Truck'), findsOneWidget);
   });
 
+  testWidgets(
+      'shows an estimated fuel refund in the hero banner and next to each row\'s gallons '
+      'when the setting is on', (tester) async {
+    final entry = FuelEntry(
+      id: 'e1',
+      vehicleId: 'v1',
+      date: DateTime(2026, 5, 14),
+      gallons: 10.523,
+      pricePerGallon: 3.5,
+      totalCost: 32.48,
+      updatedAt: DateTime.utc(2026, 5, 14),
+      receiptDriveFileId: 'remote-1',
+    );
+    final appState = AppState()
+      ..isLoading = false
+      ..vehicles = [vehicle]
+      ..fuelEntries = [entry]
+      ..showEstimatedFuelRefund = true;
+
+    await tester.pumpWidget(
+      ChangeNotifierProvider.value(
+        value: appState,
+        child: const MaterialApp(home: ReceiptsScreen()),
+      ),
+    );
+
+    expect(find.text('Est. Refund'), findsOneWidget, reason: 'replaces the hero icon');
+    // 10.523 gal rounds up to 11, * $0.125/gal = $1.375, floored to $1.37 —
+    // the hero's own standalone stat value...
+    expect(find.text('\$1.37'), findsOneWidget);
+    // ...and the same figure again, folded into the row's combined text.
+    expect(find.textContaining('10.523 gal  ·  Est. \$1.37'), findsOneWidget);
+  });
+
+  testWidgets("doesn't show an estimated fuel refund anywhere when the setting is off (default)",
+      (tester) async {
+    final entry = FuelEntry(
+      id: 'e1',
+      vehicleId: 'v1',
+      date: DateTime(2026, 5, 14),
+      gallons: 10.523,
+      pricePerGallon: 3.5,
+      totalCost: 32.48,
+      updatedAt: DateTime.utc(2026, 5, 14),
+      receiptDriveFileId: 'remote-1',
+    );
+    final appState = AppState()
+      ..isLoading = false
+      ..vehicles = [vehicle]
+      ..fuelEntries = [entry];
+
+    await tester.pumpWidget(
+      ChangeNotifierProvider.value(
+        value: appState,
+        child: const MaterialApp(home: ReceiptsScreen()),
+      ),
+    );
+
+    expect(appState.showEstimatedFuelRefund, isFalse, reason: 'off by default');
+    expect(find.text('Est. Refund'), findsNothing);
+    expect(find.textContaining('Est. \$'), findsNothing);
+  });
+
   testWidgets('tapping a receipted row opens the receipt detail page', (tester) async {
     final entry = FuelEntry(
       id: 'e1',