Update app.py

app.py

@@ -70,6 +70,8 @@ elif input_option == "Upload CSV File":
     if uploaded_file:
         st.session_state.df = pd.read_csv(uploaded_file)
         st.success("File uploaded successfully!")
+    if st.session_state.df is not None:
+        st.subheader("📂 Dataset Preview")
         st.dataframe(st.session_state.df.head())
 
 # SQL-RAG Analysis