Enhance school simulation management by introducing a new SchoolWeekDays option, allowing configuration of the number of working days in a week. Update the API to include school week days in responses and enhance documentation to reflect these changes. Revise UI components to support the new management features, ensuring a seamless user experience when hiring and assigning staff. Update localization strings for improved clarity and consistency across the application.

src/HSchool.Content/CalendarDefs.cs

@@ -0,0 +1,37 @@
+namespace HSchool.Content;
+
+/// <summary>Bells and breaks of one school day. A catalog may have only one concrete frame.</summary>
+public sealed class DayFrameDef : Def
+{
+    /// <summary>Local game-clock time of the first lesson, <c>HH:mm</c>.</summary>
+    public string FirstLesson { get; init; } = "08:30";
+
+    public int LessonCount { get; init; }
+
+    public int LessonMinutes { get; init; }
+
+    public int BreakMinutes { get; init; }
+
+    /// <summary>The long break follows this 1-based lesson. Zero means every break is short.</summary>
+    public int LongBreakAfter { get; init; }
+
+    public int LongBreakMinutes { get; init; }
+}
+
+public sealed class MonthDay
+{
+    public int Month { get; init; }
+
+    public int Day { get; init; }
+}
+
+/// <summary>
+/// A holiday range in month-day, repeating every academic year. When start is after end
+/// (winter), the range wraps across 1 January.
+/// </summary>
+public sealed class HolidayDef : Def
+{
+    public MonthDay Start { get; init; } = new();
+
+    public MonthDay End { get; init; } = new();
+}