feat:更新主题色兼容

lib/utils/date_utils.dart

@@ -16,3 +16,9 @@ bool isToday(DateTime? date) {
       date.month == now.month &&
       date.day == now.day;
 }
+
+bool isAfterToday(DateTime? date) {
+  if (date == null) return false;
+
+  return date.isAfter(DateTime.now());
+}