Update app/construction.py

app/construction.py

@@ -21,6 +21,7 @@ from typing import Dict, List, Any, Optional, Tuple, Union
 # Import the centralized data module and materials library
 from app.m_c_data import get_default_constructions
 from app.materials_library import get_available_materials, Material, MaterialCategory
+from app.m_c_data import SAMPLE_MATERIALS, SAMPLE_FENESTRATIONS, DEFAULT_MATERIAL_PROPERTIES, DEFAULT_WINDOW_PROPERTIES
 
 # Configure logging
 logging.basicConfig(level=logging.INFO, format='%(asctime)s - %(levelname)s - %(message)s')