Update main.py

main.py

@@ -36,6 +36,7 @@ from app.renewable_energy import display_renewable_energy_page
 from app.embodied_energy import display_embodied_energy_page
 from app.materials_cost import display_materials_cost_page
 from app.m_c_data import SAMPLE_MATERIALS, SAMPLE_FENESTRATIONS, DEFAULT_MATERIAL_PROPERTIES, DEFAULT_WINDOW_PROPERTIES, SAMPLE_CONSTRUCTIONS
+from app.i_l_data import PEOPLE_ACTIVITY_LEVELS, DEFAULT_BUILDING_INTERNALS, DEFAULT_EQUIPMENT_LOADS, DEFAULT_OCCUPANT_DENSITY, DEFAULT_SCHEDULE_TEMPLATES, LIGHTING_FIXTURE_TYPES, display_internal_loads_help
 
 class BuildSustain:
     """
@@ -137,10 +138,18 @@ class BuildSustain:
                     "skylights": []
                 },
                 "internal_loads": {
-                    "schedules": {},
-                    "people": [],
-                    "lighting": [],
-                    "equipment": [],
+                    "schedules": dict(DEFAULT_SCHEDULE_TEMPLATES),
+                    "people": {
+                        "activity_levels": dict(PEOPLE_ACTIVITY_LEVELS),
+                        "occupant_densities": dict(DEFAULT_OCCUPANT_DENSITY)
+                    },
+                    "lighting": {
+                        "fixture_types": dict(LIGHTING_FIXTURE_TYPES),
+                        "building_internals": dict(DEFAULT_BUILDING_INTERNALS)
+                    },
+                    "equipment": {
+                        "loads": dict(DEFAULT_EQUIPMENT_LOADS)
+                    },
                     "ventilation": [],
                     "infiltration": []
                 },
@@ -341,8 +350,22 @@ class BuildSustain:
                 if key in st.session_state:
                     st.session_state.pop(key, None)
         
-        # Clear any module-specific rerun flags when changing pages
-        st.session_state.module_rerun_flags = {}
+        # Clear internal loads specific states when leaving the Internal Loads page
+        if previous_page == "Internal Loads":
+            keys_to_clear = [
+                "people_editor",
+                "lighting_editor",
+                "equipment_editor",
+                "ventilation_editor",
+                "infiltration_editor",
+                "internal_loads_action",
+                "internal_loads_rerun_pending",
+                "internal_loads_form_state",
+                "rerun_trigger"
+            ]
+            for key in keys_to_clear:
+                if key in st.session_state:
+                    st.session_state.pop(key, None)
     
     def _handle_module_reruns(self):
         """