Update src/streamlit_app.py

src/streamlit_app.py

@@ -597,7 +597,7 @@ if st.session_state.execute_batch_analysis and 'json_data_for_batch' in st.sessi
                         "context": retrieved_ctx
                     }
                     csv_string = pd.json_normalize(item)
-                        
+                    csv_string = csv_string.to_csv(header=True, index=False, encoding='utf-8')      
                     with results_container:
 
                         # 呈現 LLM 分析結果