add shel

src/HSchool.Content/MapView.cs

@@ -121,23 +121,24 @@ public static class MapView
         string locale,
         RoomNode room)
     {
-        var items = new List<MapViewItem>(room.Slots.Count);
-        var pupilSlots = 0L;
-        foreach (var fill in room.Slots)
+        if (catalog.Rooms.TryGetValue(room.Def, out var def) && def.Homeroom && !string.IsNullOrWhiteSpace(def.SeatThing))
         {
-            var count = SlotQuantity(fill.Count);
-            items.Add(new MapViewItem(LabelOf(catalog, locale, DefKind.Thing, fill.Thing), count));
-            if (catalog.Things.TryGetValue(fill.Thing, out var thing) && thing.PupilSlots > 0)
-            {
-                pupilSlots += (long)thing.PupilSlots * count;
-            }
+            var seats = RoomOccupancy.Quantity(room.Seats > 0 ? room.Seats : def.DefaultSeats);
+            return (
+                [new MapViewItem(LabelOf(catalog, locale, DefKind.Thing, def.SeatThing), seats)],
+                RoomOccupancy.PupilSlots(catalog, room));
         }
 
-        return (items, (int)Math.Clamp(pupilSlots, 0, ushort.MaxValue));
-    }
+        var items = new List<MapViewItem>(room.Slots.Count);
+        foreach (var fill in room.Slots)
+        {
+            items.Add(new MapViewItem(
+                LabelOf(catalog, locale, DefKind.Thing, fill.Thing),
+                RoomOccupancy.Quantity(fill.Count)));
+        }
 
-    private static int SlotQuantity(int count) =>
-        count < 1 ? 1 : Math.Min(count, byte.MaxValue);
+        return (items, RoomOccupancy.PupilSlots(catalog, room));
+    }
 
     /// <summary>
     /// A floor's <see cref="FloorNode.Label"/> is its designation, not a replacement name — the