Update app.py

app.py

@@ -20,9 +20,6 @@ if "response_ready" not in st.session_state:
 if "follow_up" not in st.session_state:
     st.session_state.follow_up = ""  # Stores follow-up question
 
-if "last_topic" not in st.session_state:
-    st.session_state.last_topic = ""  # Stores last user topic
-
 # --- Set Up Model & API Functions ---
 model_id = "mistralai/Mistral-7B-Instruct-v0.3"
 
@@ -123,7 +120,7 @@ if st.sidebar.button("Reset Chat"):
     st.session_state.response_ready = False
     st.session_state.follow_up = ""
     st.session_state.last_topic = ""
-    st.rerun()  
+    st.rerun()  # 
 
 # Custom Chat Styling
 st.markdown("""