feat:增加公共组件

lib/utils/date_utils.dart

@@ -11,3 +11,20 @@ String formatDateString(String date) {
 String formatTime(DateTime datetime) {
   return DateFormat('yyyy-MM-dd HH:mm:ss').format(datetime);
 }
+
+bool isToday(DateTime? date) {
+  if (date == null) return false;
+
+  final now = DateTime.now();
+  return date.year == now.year &&
+      date.month == now.month &&
+      date.day == now.day;
+}
+
+bool isAfterToday(DateTime? date) {
+  if (date == null) return false;
+
+  if (!isToday(date)) return false;
+
+  return date.isAfter(DateTime.now());
+}