add no abstracat case

app.py

@@ -36,8 +36,8 @@ elif input_method == "Manual Input":
     title = st.text_input("Enter Article Title:")
     abstract = st.text_area("Enter Article Abstract:")
     if st.button("Classify"):
-        if not title or not abstract:
-            st.error("Please provide both title and abstract.")
+        if not title:
+            st.error("Please provide title")
 
 # Classification and output
 if title and abstract: