add submit button

app.py

@@ -9,10 +9,11 @@ st.title("Demo translate VI - EN")
 
 input_text = st.text_area("Input the Vietnamese text:", "")
 
-if input_text:
-    encoded_text = tokenizer(input_text, return_tensors="pt", padding=True, truncation=True)
-
-    translated_text = translator(input_text)
-
-    st.write("Translation Vietnamese to English:")
-    st.write(translated_text[0]["translation_text"])
+if st.button("Submit"):
+    if input_text:
+        encoded_text = tokenizer(input_text, return_tensors="pt", padding=True, truncation=True)
+    
+        translated_text = translator(input_text)
+    
+        st.write("Translation Vietnamese to English:")
+        st.write(translated_text[0]["translation_text"])