Fix sample question buttons to trigger rerun

app.py

@@ -176,6 +176,7 @@ with st.sidebar:
     for q in samples:
         if st.button(f"💬 {q}", key=f"s_{hash(q)}"):
             st.session_state.current_question = q
+            st.rerun()
     
     if st.button("🗑️ Clear Chat"):
         st.session_state.chat_history = []