Enhance export file processing in app.py: add mapping for non-excluded columns in the export file using the export dictionary, improving data accuracy during portfolio downloads.

app.py

@@ -968,6 +968,9 @@ with tab2:
                                 st.write('Export portfolio updated!')
                 else:
                     st.session_state['export_file'] = st.session_state['portfolio'].copy()
+                    for col in st.session_state['export_file'].columns:
+                                    if col not in excluded_cols:
+                                        st.session_state['export_file'][col] = st.session_state['export_file'][col].map(st.session_state['export_dict'])
             if 'export_file' in st.session_state:    
                 st.download_button(label="Download Portfolio", data=st.session_state['export_file'].to_csv(index=False), file_name="portfolio.csv", mime="text/csv")
             else: