Fix: Replace width='stretch' with use_container_width=True for Streamlit 1.35.0 compatibility

src/ui_app.py

@@ -469,12 +469,12 @@ def display_premium_metrics(evaluation_result: Dict, reflection_result: Dict):
         with col1:
             context_rel = metrics.get('context_relevance', 0)
             fig = create_gauge_chart(context_rel, "Context Relevance")
-            st.plotly_chart(fig, width='stretch')
+            st.plotly_chart(fig, use_container_width=True)
         
         with col2:
             reflection_score = reflection_result.get('score', 0)
             fig = create_gauge_chart(reflection_score, "Overall Quality")
-            st.plotly_chart(fig, width='stretch')
+            st.plotly_chart(fig, use_container_width=True)
         
         with col3:
             # Calculate average score
@@ -490,7 +490,7 @@ def display_premium_metrics(evaluation_result: Dict, reflection_result: Dict):
                 avg_score /= count
             
             fig = create_gauge_chart(avg_score if count > 0 else reflection_score, "Combined Score")
-            st.plotly_chart(fig, width='stretch')
+            st.plotly_chart(fig, use_container_width=True)
         
         # Bottom row - Key stats
         st.markdown("### Key Statistics")
@@ -543,7 +543,7 @@ def display_premium_metrics(evaluation_result: Dict, reflection_result: Dict):
                     'ROUGE-L': metrics["rouge"].get('rougeL', 0)
                 }
                 fig = create_bar_chart(rouge_data, "ROUGE Score Analysis")
-                st.plotly_chart(fig, width='stretch')
+                st.plotly_chart(fig, use_container_width=True)
             else:
                 st.info("💡 Add a reference answer to see ROUGE scores")
         
@@ -556,7 +556,7 @@ def display_premium_metrics(evaluation_result: Dict, reflection_result: Dict):
                     'F1 Score': metrics["bertscore"].get('f1', 0)
                 }
                 fig = create_bar_chart(bert_data, "BERTScore Analysis")
-                st.plotly_chart(fig, width='stretch')
+                st.plotly_chart(fig, use_container_width=True)
             else:
                 st.info("💡 Add a reference answer to see BERTScore")
     
@@ -608,7 +608,7 @@ def display_premium_metrics(evaluation_result: Dict, reflection_result: Dict):
                 if breakdown:
                     st.markdown("#### 📊 Score Breakdown")
                     fig = create_radar_chart(breakdown)
-                    st.plotly_chart(fig, width='stretch')
+                    st.plotly_chart(fig, use_container_width=True)
     
     with tab4:
         st.markdown("### Detailed Evaluation Report")
@@ -642,7 +642,7 @@ def display_premium_metrics(evaluation_result: Dict, reflection_result: Dict):
             data=json_str,
             file_name=f"rag_evaluation_{datetime.now().strftime('%Y%m%d_%H%M%S')}.json",
             mime="application/json",
-            width='stretch'
+            use_container_width=True
         )
 
 
@@ -713,7 +713,7 @@ def main():
         ]
         
         for icon, query in sample_queries:
-            if st.button(f"{icon} {query}", key=f"sample_{query}", width='stretch'):
+            if st.button(f"{icon} {query}", key=f"sample_{query}", use_container_width=True):
                 st.session_state["query"] = query
         
         st.markdown("---")
@@ -753,9 +753,9 @@ def main():
     
     col1, col2, col3, col4, col5 = st.columns([2, 2, 2, 2, 2])
     with col1:
-        submit_button = st.button("🚀 **Ask Question**", type="primary", width='stretch')
+        submit_button = st.button("🚀 **Ask Question**", type="primary", use_container_width=True)
     with col2:
-        clear_button = st.button("🗑️ **Clear**", width='stretch')
+        clear_button = st.button("🗑️ **Clear**", use_container_width=True)
     
     if clear_button:
         st.session_state.clear()