Add table display for updated portfolio in app.py: enhance user feedback by showing the export file after submission, improving visibility of changes made to the portfolio.

app.py

@@ -945,6 +945,7 @@ with tab3:
                         submitted = st.form_submit_button("Submit")
                         if submitted:
                             st.write('Export portfolio updated!')
+                            st.table(export_file)
                 
             st.download_button(label="Download Portfolio", data=export_file.to_csv(index=False), file_name="portfolio.csv", mime="text/csv")