Update app/main.py

app/main.py

@@ -109,7 +109,7 @@ class HVACCalculator:
         self.data_export = DataExport()
         self.cooling_calculator = CoolingLoadCalculator()
         self.heating_calculator = HeatingLoadCalculator()
-        self.drapery_system = DraperySystem()  # NEW: Drapery system
+        self.drapery = Drapery()  # NEW: Drapery system
         
         # Persist ClimateData in session_state
         if 'climate_data_obj' not in st.session_state: