fix selected model

main.py

@@ -53,15 +53,16 @@ lang2.selectbox(
 
 selected_model = MODELS[f"{st.session_state['input_lang']}->{st.session_state['output_lang']}"]
 
-st.markdown(f"""
-**Selected model:** [{selected_model[0]}]({selected_model[1]})
-""")
 
 if selected_model[0] == None:
     st.write("No model available for this pair.")
 elif selected_model[0] == 0:
     st.write("No translation necessary.")
 else:
+    st.markdown(f"""
+    **Selected model:** [{selected_model[0]}]({selected_model[1]})
+    """)
+    
     input_text = st.text_area("Enter text to translate:", height=400, key="input")
     translate_text = st.button("Translate")