feat:特色菜收费

lib/common/utils/json/json_tool.dart

@@ -1,7 +1,8 @@
 import 'package:pj_supermarket_cloud/common/index.dart';
 
 abstract class JsonTool {
-  static bool stringToBoolean(String value) {
+  static bool stringToBoolean(String? value) {
+    if (value == null) return false;
     return value == '1';
   }