fix:(jg) 设备注册代码生成未考虑闰年，导致2月29非法日期bug处理

amos-boot-system-tzs/amos-boot-module-ymt/amos-boot-module-ymt-api/src/main/java/com/yeejoin/amos/boot/module/ymt/api/common/DateUtils.java

@@ -15,11 +15,15 @@ public class DateUtils {
 
     public static Date calculateEndOfMonth(Date currentDate) {
         LocalDateTime localDateTime = toLocalDateTime(currentDate);
-        LocalDateTime endOfMonth = localDateTime.with(localDateTime.withDayOfMonth(localDateTime.getMonth().maxLength())
+        // 获取当前月份的实际天数（考虑闰年）
+        int lastDay = localDateTime.getMonth().length(localDateTime.toLocalDate().isLeapYear());
+        // 直接设置为本月最后一天 23:59:59.999
+        LocalDateTime endOfMonth = localDateTime
+                .withDayOfMonth(lastDay)
                 .withHour(23)
                 .withMinute(59)
                 .withSecond(59)
-                .withNano(999999999));
+                .withNano(999_999_999);
         return toDate(endOfMonth);
     }