Implement comprehensive academic workflow enhancements

src/Jiaowu.Api/Domain/Academic/OrganizationEntities.cs

@@ -44,6 +44,7 @@ public sealed class Classroom : CatalogEntity
 {
     public Guid BuildingId { get; set; }
     public Building? Building { get; set; }
+    public int Floor { get; set; } = 1;
     public int Capacity { get; set; }
     public string RoomType { get; set; } = "普通教室";
     public TeachingVenueNature TeachingVenueNature { get; set; } =