[UX] tab4_optimization.py: British spelling (Optimization -> Optimisation)

tabs/tab4_optimization.py

@@ -254,7 +254,7 @@ def panel_load_from_json_or_csv():
 
     if "scenario_loaded_file" in st.session_state:
         st.success(
-            f"Scenario **{st.session_state['scenario_loaded_file']}** loaded :\n\nAll tabs updated - Optimization results displayed.",
+            f"Scenario **{st.session_state['scenario_loaded_file']}** loaded :\n\nAll tabs updated - Optimisation results displayed.",
             icon="✅"
         )
     uploaded_json = st.file_uploader(
@@ -510,7 +510,7 @@ def run_and_store_result():
     )
 
     if not success:
-        st.error("❌ Optimization failed")
+        st.error("❌ Optimisation failed")
         if "message" in result:
             st.error(result["message"])
         return
@@ -526,7 +526,7 @@ def run_and_store_result():
     total_removed = result["total_removed"]
 
     if total_removed <= 0:
-        st.warning(f"❌ Optimization removed 0 {CO2_UNIT}. Relax constraints or increase resources.", icon=":material/warning:")
+        st.warning(f"❌ Optimisation removed 0 {CO2_UNIT}. Relax constraints or increase resources.", icon=":material/warning:")
         return
 
     total_cost = sum(
@@ -1330,7 +1330,7 @@ def render_tab():
     st.markdown(
         """
         <div class="text_with_border">
-            <p>Run the optimization tool, explore results and save scenarios for comparison or export.</p>
+            <p>Run the optimisation tool, explore results and save scenarios for comparison or export.</p>
         </div>
         """,
         unsafe_allow_html=True
@@ -1355,7 +1355,7 @@ def render_tab():
 
     with tab_run:
         st.markdown("""
-            <p class="crra-sub-heading">Run optimization</p>""",
+            <p class="crra-sub-heading">Run optimisation</p>""",
             unsafe_allow_html=True,
         )
         col_inputs, col_scenario = st.columns(2, gap="large")
@@ -1365,7 +1365,7 @@ def render_tab():
                 <p class="crra-sub-sub-heading">From inputs</p>""",
                 unsafe_allow_html=True,
             )
-            run_clicked = st.button("Run Optimization", icon=":material/play_arrow:", key="btn-run-optimization", type="primary")
+            run_clicked = st.button("Run Optimisation", icon=":material/play_arrow:", key="btn-run-optimization", type="primary")
             run_msg_area = st.container()
             panel_run_from_tabs()
             panel_load_from_excel()
@@ -1381,7 +1381,7 @@ def render_tab():
             with run_msg_area:
                 run_and_store_result()
 
-    no_results = '<p class="caption">Run the optimization first to see results here.</p>'
+    no_results = '<p class="caption">Run the optimisation first to see results here.</p>'
 
     latest = st.session_state.get("latest_result")
     if not latest:
@@ -1415,7 +1415,7 @@ def render_tab():
 
     with tab_results:
         show_metrics(latest)
-        st.markdown('<p class="crra-sub-heading">Optimization Summary</p>', unsafe_allow_html=True)
+        st.markdown('<p class="crra-sub-heading">Optimisation Summary</p>', unsafe_allow_html=True)
         st.dataframe(df_display, width='stretch')
         st.markdown('<p class="crra-sub-heading">Method allocation breakdown</p>', unsafe_allow_html=True)
         st.markdown(