Update frontend.py

frontend.py

@@ -50,7 +50,11 @@ with st.sidebar:
 
     DEFAULT_DEMO_TOKEN = "my-secret-key"  # 💡 replace with secure demo token
     api_token = st.text_input("🔐 API Token", value=DEFAULT_DEMO_TOKEN, type="password")
+     # 🟡 Insert this warning right after the token field
+    if not api_token or api_token.strip() == "my-secret-key":
+        st.warning("🧪 Running in demo mode — for full access, enter a valid API key.")
 
+    
     backend_url = st.text_input("🌐 Backend URL", value="http://localhost:8000")
 
     sentiment_model = st.selectbox("📊 Sentiment Model", [