Enhance timetable functionality and UI integration

- Updated protocol documentation to include new `classId` and `roomLabel` fields in the timetable API responses.
- Added classes and rooms to the timetable response structure, improving data accessibility for client applications.
- Enhanced the UI components to display timetable information, including class and room details, in the management and people panels.
- Implemented functionality to fetch and display personal timetables for individuals, ensuring a comprehensive view of schedules.
- Revised localization strings to support new timetable features and improve user experience.
- Added tests to validate the new timetable functionalities and ensure robustness in handling timetable data.

src/HSchool.Server/Game/SchoolWorker.cs

@@ -46,6 +46,7 @@ internal sealed class SchoolWorker
     private ApplicantPool? _applicantSnapshot;
     private DefCatalog? _catalogSnapshot;
     private Timetable? _timetableSnapshot;
+    private MapLayout? _mapSnapshot;
     private OccupancyKey _occupancyKey;
     private School? _school;
     private Task? _run;
@@ -109,6 +110,9 @@ internal sealed class SchoolWorker
     /// <summary>Last built timetable. Published like the roster — HTTP never reads the live school.</summary>
     public Timetable? TimetableSnapshot => Volatile.Read(ref _timetableSnapshot);
 
+    /// <summary>Frozen map instance. Safe to read from HTTP with the catalog; it does not mutate.</summary>
+    public MapLayout? MapSnapshot => Volatile.Read(ref _mapSnapshot);
+
     public void Start()
     {
         _run = Task.Factory.StartNew(
@@ -205,6 +209,7 @@ internal sealed class SchoolWorker
         var catalog = _mods.LoadCatalog(packIds, _logger);
         Volatile.Write(ref _catalogSnapshot, catalog);
         var map = _mods.LoadMap(packIds, _savedMap);
+        Volatile.Write(ref _mapSnapshot, map);
         try
         {
             MapValidator.Validate(map, catalog);
@@ -565,6 +570,7 @@ internal sealed class SchoolWorker
         Volatile.Write(ref _rosterSnapshot, school.Roster);
         Volatile.Write(ref _applicantSnapshot, school.Applicants);
         Volatile.Write(ref _timetableSnapshot, school.Timetable);
+        Volatile.Write(ref _mapSnapshot, school.Map);
     }
 
     /// <summary>