Fix #6392: when duplicating a window/door/etc, the associated IfcOpenElement duplicates as well.

Also when `bim.append_library_element` it copies the IfcOpenElement, as well.

src/bonsai/bonsai/bim/module/project/operator.py

@@ -611,6 +611,8 @@ class AppendLibraryElement(bpy.types.Operator, tool.Ifc.Operator):
         if not element:
             return {"FINISHED"}
         if element.is_a("IfcTypeProduct"):
+            # Store opening template from library if it exists
+            self.store_opening_template_from_library(element, library_file)
             self.import_type_from_ifc(element, context)
         elif element.is_a("IfcProduct"):
             # NOTE: Non-types are not exposed in UI directly
@@ -712,6 +714,56 @@ class AppendLibraryElement(bpy.types.Operator, tool.Ifc.Operator):
                 ifc_importer.create_style(element)
 
 
+    def store_opening_template_from_library(
+        self,
+        element: ifcopenshell.entity_instance,
+        library_file: ifcopenshell.file
+    ) -> None:
+        """
+        Find an opening representation in the library and copy it to the current file
+        as a template. Store the template ID on the type for later retrieval.
+        """
+        try:
+            library_element = library_file.by_guid(element.GlobalId)
+        except:
+            return
+        
+        # Find occurrences with openings in the library
+        library_occurrences = ifcopenshell.util.element.get_types(library_element)
+        
+        for occurrence in library_occurrences:
+            if not getattr(occurrence, "FillsVoids", None):
+                continue
+            
+            library_opening = occurrence.FillsVoids[0].RelatingOpeningElement
+            library_opening_rep = ifcopenshell.util.representation.get_representation(
+                library_opening, "Model", "Body", "MODEL_VIEW"
+            )
+            
+            if not library_opening_rep:
+                continue
+                
+            # Check if mapped representation
+            if (library_opening_rep.RepresentationType == 'MappedRepresentation' and 
+                len(library_opening_rep.Items) == 1 and 
+                library_opening_rep.Items[0].is_a("IfcMappedItem")):
+                
+                mapped_rep = library_opening_rep.Items[0].MappingSource.MappedRepresentation
+                
+                # Store ALL representation types (Tessellation, SweptSolid, etc.)
+                template_rep = ifcopenshell.util.element.copy_deep(
+                    self.file,
+                    mapped_rep,
+                    exclude=["IfcGeometricRepresentationContext"]
+                )
+                
+                # Store reference in type's Description
+                current_desc = element.Description or ""
+                element.Description = f"{current_desc}||BonsaiOpeningTemplate:{template_rep.id()}"
+                return
+            break
+
+
 class EditProjectLibrary(bpy.types.Operator):
     bl_idname = "bim.edit_project_library"
     bl_label = "Edit Project Library"