Implement user interface customization features and enhance metadata handling

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

@@ -1056,6 +1056,18 @@ class LoadProject(bpy.types.Operator, IFCFileSelector, ImportHelper):
         return tooltip
 
     def execute(self, context):
+        if (tool.Blender.get_addon_preferences().user_ui_customization 
+            and self.should_start_fresh_session 
+            and not self.is_advanced):
+            filepath = self.get_filepath()
+            metadata_path = Path(str(filepath) + ".metadata.blend")
+            if metadata_path.exists() and metadata_path.is_file():
+                try:
+                    bpy.ops.bim.load_blend_metadata_and_ifc(filepath=filepath)
+                    return {"FINISHED"}
+                except Exception as e:
+                    self.report({"WARNING"}, f"Failed to load metadata file, using regular load: {e}")
+        
         @persistent
         def load_handler(*args):
             bpy.app.handlers.load_post.remove(load_handler)
@@ -1748,6 +1760,13 @@ class ExportIFC(bpy.types.Operator, ExportHelper):
         if save_blend_file:
             bpy.ops.wm.save_mainfile(filepath=bpy.data.filepath)
         bim_props.is_dirty = False
+        
+        if tool.Blender.get_addon_preferences().user_ui_customization:
+            try:
+                bpy.ops.bim.save_blend_metadata_file()
+            except Exception as e:
+                settings.logger.warning(f"Failed to save blend metadata file: {e}")
+        
         bonsai.bim.handler.refresh_ui_data()
         self.report(
             {"INFO"},