[FIX] Auto-disable methods with only hidden resources and force tab2 widget sync on navigation

app.py

@@ -9,7 +9,7 @@ from tabs import (tab0_welcome, tab1_inputs, tab2_constraints,
                   tab3_coefficients, tab4_optimization, tab5_sensitivity,
                   tab6_scenarios)
 from utils.data_utils import load_slider_data, strip_unit_suffix
-from config.config import method_order, secondary_resources
+from config.config import method_order, secondary_resources, hidden_resource_names
 
 # ── Auto-update: regenerate JSON files if inputs_aggregated.csv has changed ───
 # Uses a hash file to detect changes — works both locally and on Hugging Face.
@@ -102,13 +102,26 @@ with st.sidebar:
         }
     )
 
+cost_sliders = load_slider_data()
+
 if "constraints" not in st.session_state:
     st.session_state.constraints = {}
+if "auto_disabled_methods" not in st.session_state:
+    st.session_state.auto_disabled_methods = set()
 for m in method_order:
     if m not in st.session_state.constraints:
-        st.session_state.constraints[m] = {"active": True, "cap_type": "percent", "cap_value": 100}
-
-cost_sliders = load_slider_data()
+        primary = [
+            strip_unit_suffix(r) for r in cost_sliders.get(m, {})
+            if (m, strip_unit_suffix(r)) not in secondary_resources
+        ]
+        all_hidden = bool(primary) and all(r in hidden_resource_names for r in primary)
+        st.session_state.constraints[m] = {
+            "active": not all_hidden,
+            "cap_type": "percent",
+            "cap_value": 100,
+        }
+        if all_hidden:
+            st.session_state.auto_disabled_methods.add(m)
 _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:
@@ -120,12 +133,23 @@ if "costs" not in st.session_state or st.session_state.costs == {} or _expected_
         for m in cost_sliders
     }
 
+# When the user navigates TO "Method constraints" from any other tab, force a
+# full widget re-sync so toggle_M / slider_M keys always reflect the constraint
+# state.  Normal-mode setdefault can't recover keys that were externally set to
+# False/0; force mode overwrites them unconditionally from constraints (which
+# remain correct — the summary table at the bottom of tab2 always confirms
+# this).  The flag is consumed (popped) by tab2's own pre-render sync.
+_prev_tab = st.session_state.get("_active_tab")
+if selected == "Method constraints" and _prev_tab != "Method constraints":
+    st.session_state["constraints_just_loaded"] = True
+st.session_state["_active_tab"] = selected
+
 if selected == "Welcome":
     tab0_welcome.render_tab()
 elif selected == "Resource inputs":
     tab1_inputs.render_tab(cost_sliders)
 elif selected == "Method constraints":
-    tab2_constraints.render_tab()
+    tab2_constraints.render_tab(cost_sliders)
 elif selected == "Resource coefficients":
     tab3_coefficients.render_tab(cost_sliders)
 elif selected == "Portfolio generation":