Add Streamlit demo

app.py

@@ -1,26 +1,6 @@
+# app.py
 import streamlit as st
-import requests
 
-st.title("Spatial Parser Demo")
-
-# 密码验证
-password = st.text_input("Enter access password:", type="password")
-if password != "demo1234":
-    st.warning("Please enter the correct password.")
-    st.stop()
-
-# 输入框
-text = st.text_area("Enter your spatial description:")
-
-if st.button("Submit"):
-    with st.spinner("Calling secure backend..."):
-        try:
-            response = requests.post(
-                "https://dsbb0707-SpatialParse_back.hf.space/predict",
-                json={"text": text},
-                timeout=20
-            )
-            result = response.json().get("result", "No result returned.")
-            st.success(f"Parsed Output:\n\n{result}")
-        except Exception as e:
-            st.error(f"Backend error: {e}")
+st.title("Spatial Parse Demo")
+x = st.slider('Select a value')
+st.write(x, 'squared is', x * x)