[FIX] Force module reload and cache clear after CSV auto-update to avoid double restart

app.py

@@ -39,6 +39,14 @@ if os.path.exists(csv):
         with open(hash_file, "w") as file:
             file.write(current_hash)
         print("Data files updated successfully.")
+        # Force all app modules to reload on next rerun so they read fresh JSONs.
+        # config.config is imported at module level and won't re-execute unless we
+        # evict it from sys.modules before st.rerun() re-runs the script.
+        for _key in list(sys.modules.keys()):
+            if any(_key.startswith(p) for p in ("config", "tabs", "utils")):
+                del sys.modules[_key]
+        st.cache_data.clear()
+        st.rerun()
 
 st.set_page_config("Carbon Portfolio Optimizer", layout="wide")
 
@@ -101,7 +109,9 @@ for m in method_order:
         st.session_state.constraints[m] = {"active": True, "cap_type": "percent", "cap_value": 100}
 
 cost_sliders = load_slider_data()
-if "costs" not in st.session_state or st.session_state.costs == {}:
+_expected_methods = set(cost_sliders.keys())
+_current_methods = set(st.session_state.get("costs", {}).keys())
+if "costs" not in st.session_state or st.session_state.costs == {} or _expected_methods != _current_methods:
     st.session_state.costs = {
         m: {
             strip_unit_suffix(r): (0.0 if (m, strip_unit_suffix(r)) in secondary_resources else cost_sliders[m][r]["median"])