Add ITSM RAG chatbot frontend

.streamlit/secrets.toml

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+[API_ENDPOINT]
+value = "https://3nmcc1yzsj.execute-api.us-east-1.amazonaws.com/prod/chat"

requirements.txt

@@ -1,3 +1,2 @@
-altair
-pandas
-streamlit
+streamlit==1.28.0
+requests==2.31.0

streamlit_app.py

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+import streamlit as st
+import requests
+import json
+
+st.set_page_config(page_title="ITSM RAG Chatbot", layout="wide")
+st.title("📚 ITSM Operational Assistant")
+st.markdown("Ask questions about IT support procedures, policies, and troubleshooting steps.")
+
+API_ENDPOINT = st.secrets.get("API_ENDPOINT", "https://3nmcc1yzsj.execute-api.us-east-1.amazonaws.com/prod/chat")
+
+# Initialize session state
+if "messages" not in st.session_state:
+    st.session_state.messages = []
+
+# Sidebar with example queries
+with st.sidebar:
+    st.header("Example Queries")
+    if st.button("Troubleshoot dashboard widget"):
+        st.session_state.query = "How do I troubleshoot dashboard widget issue?"
+    if st.button("Outbound email troubleshooting"):
+        st.session_state.query = " Help me troubleshoot outbound email delivery failures in the HelioMail service"
+    if st.button("Nimbus Flow connectivity issue"):
+        st.session_state.query = "How do I troubleshoot NimbusFlow desktop app connectivity"
+
+# Main chat interface
+with st.form("chat_form"):
+    user_input = st.text_input("Your question:", key="query")
+    submit = st.form_submit_button("Send")
+
+if submit and user_input:
+    st.session_state.messages.append({"role": "user", "content": user_input})
+    
+    with st.spinner("Retrieving answer..."):
+        try:
+            response = requests.post(
+                API_ENDPOINT,
+                json={"query": user_input},
+                timeout=30
+            )
+            if response.status_code == 200:
+                result = response.json()
+                answer = result['answer']
+                sources = result.get('sources', [])
+                
+                st.session_state.messages.append({
+                    "role": "assistant",
+                    "content": answer,
+                    "sources": sources
+                })
+            else:
+                st.error(f"API error: {response.status_code}")
+        except Exception as e:
+            st.error(f"Error: {str(e)}")
+
+# Display conversation
+for msg in st.session_state.messages:
+    with st.chat_message(msg["role"]):
+        st.write(msg["content"])
+        if msg["role"] == "assistant" and "sources" in msg:
+            with st.expander("📖 Sources"):
+                for source in msg["sources"]:
+                    st.caption(f"• {source}")