Update app.py

app.py

@@ -257,11 +257,12 @@ def main():
     if "chat_history" not in st.session_state:
         st.session_state.chat_history = []
 
-    st.header("Chat with MODTRAN Documents 📄🤖")
+    st.header("Chat with MODTRAN Documents 📄")
 
     # Preload the document once when app starts
     if not st.session_state.chat_ready:
         with st.spinner("Loading MODTRAN document..."):
+            preload_modtran_document()
             st.session_state.agent = initialize_chatbot_agent()
             st.session_state.chat_ready = True
             st.success("MODTRAN User Manual loaded successfully!")