fix:新增三明治流程相关字段

coolstore-partner-common/src/main/java/com/cool/store/utils/CommonUtil.java

@@ -0,0 +1,25 @@
+package com.cool.store.utils;
+
+import org.apache.commons.lang3.StringUtils;
+
+import java.math.BigDecimal;
+
+/**
+ * <p>
+ * 公告工具
+ * </p>
+ *
+ * @author wangff
+ * @since 2025/10/29
+ */
+public class CommonUtil {
+    public static BigDecimal convertToBig(String value) {
+        if (StringUtils.isBlank(value)) {
+            return BigDecimal.ZERO;
+        }
+        try {
+            return new BigDecimal(value);
+        } catch (Exception ignored) {}
+        return BigDecimal.ZERO;
+    }
+}