feat:收银页面副屏改大

lib/sub_screen/common/utils/customer_display_coordinator.dart

@@ -168,13 +168,16 @@ class CustomerDisplayCoordinator extends ChangeNotifier {
     final unitPrice = _nonNegativeInt(data['productPrice']);
     final totalPrice = _nonNegativeInt(data['totalPrice']);
     final nature = data['nature'];
+    final rawImageSource = data['productPic'];
     if (name is! String ||
         name.trim().isEmpty ||
         unitPrice == null ||
         totalPrice == null ||
-        nature is! String) {
+        nature is! String ||
+        (rawImageSource != null && rawImageSource is! String)) {
       return null;
     }
+    final trimmedImageSource = (rawImageSource as String?)?.trim();
 
     String quantityLabel;
     if (nature == 'WEIGHT') {
@@ -207,6 +210,8 @@ class CustomerDisplayCoordinator extends ChangeNotifier {
       quantityLabel: quantityLabel,
       unitPrice: unitPrice,
       totalPrice: totalPrice,
+      imageSource:
+          trimmedImageSource?.isEmpty == true ? null : trimmedImageSource,
       // 套餐组成非空时兼容主屏仅透传明细但缺失标识的过渡消息。
       isCombo: rawIsCombo == true || comboItems.isNotEmpty,
       comboItems: List.unmodifiable(comboItems),