widget refresh enhancements

lib/widget_data/widget_data.dart

@@ -61,6 +61,20 @@ abstract class WidgetPeriod with _$WidgetPeriod {
       _$WidgetPeriodFromJson(json);
 }
 
+/// Per-day metadata for the week payload, so native renderers can derive a
+/// single day's view (including its holiday state) without a day payload.
+@freezed
+abstract class WidgetDayInfo with _$WidgetDayInfo {
+  const factory WidgetDayInfo({
+    required DateTime date,
+    @Default(false) bool isHoliday,
+    String? holidayName,
+  }) = _WidgetDayInfo;
+
+  factory WidgetDayInfo.fromJson(Map<String, Object?> json) =>
+      _$WidgetDayInfoFromJson(json);
+}
+
 @freezed
 abstract class WidgetTimetableData with _$WidgetTimetableData {
   const factory WidgetTimetableData({
@@ -73,6 +87,8 @@ abstract class WidgetTimetableData with _$WidgetTimetableData {
     @Default(<WidgetPeriod>[]) List<WidgetPeriod> periods,
     @Default(false) bool isHoliday,
     String? holidayName,
+    /// Week payload only: one entry per day of the covered window.
+    @Default(<WidgetDayInfo>[]) List<WidgetDayInfo> days,
   }) = _WidgetTimetableData;
 
   factory WidgetTimetableData.fromJson(Map<String, Object?> json) =>