third commit

lib/presentation/pos/widgets/billing_panel.dart

@@ -12,6 +12,7 @@ import '../../../core/utils/formatters.dart';
 import '../../../core/widgets/empty_state.dart';
 import '../../../core/widgets/primary_button.dart';
 import '../../../domain/entities/cart.dart';
+import '../../customer/widgets/customer_capture_sheet.dart';
 import '../providers/cart_controller.dart';
 import 'cart_line_tile.dart';
 import 'discount_sheet.dart';
@@ -404,7 +405,16 @@ class _Actions extends ConsumerWidget {
       child: PrimaryButton(
         label: 'CHARGE',
         large: true,
-        onPressed: enabled ? () => context.push(AppRoutes.payment) : null,
+        onPressed: enabled
+            ? () async {
+                // Ask once per bill, before payment. Skipping is one tap and
+                // leaves the sale as walk-in.
+                if (ref.read(cartControllerProvider).customer == null) {
+                  await showCustomerCaptureSheet(context);
+                }
+                if (context.mounted) context.push(AppRoutes.payment);
+              }
+            : null,
         trailing: enabled
             ? Text(
                 Formatters.money(cart.grandTotal),