Adds starting files

code/app/front.py

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+import streamlit as st
+import time
+from backend import BDAgent
+import boto3
+
+# Configure the page - MUST BE FIRST
+st.set_page_config(
+    page_title="Chatbot",
+    page_icon="💬",
+    layout="centered"
+)
+
+session = boto3.Session()
+
+# Model selection with session state persistence
+MODELS = [
+    "anthropic.claude-sonnet-4-5-20250929-v1:0",
+    "meta.llama4-maverick-17b-instruct-v1:0",
+    "meta.llama4-scout-17b-instruct-v1:0",
+    "amazon.nova-lite-v1:0",
+    "amazon.nova-pro-v1:0",
+    "amazon.nova-2-lite-v1:0"
+]
+
+selected_value = st.selectbox(
+    "Selecione o modelo:",
+    MODELS,
+    key="selected_model"
+)
+    
+
+
+# Initialize chat history in session state
+if "messages" not in st.session_state:
+    st.session_state.messages = []
+
+# Display title
+st.title("💬 Chatbot")
+
+# Display chat history
+for message in st.session_state.messages:
+    with st.chat_message(message["role"]):
+        st.markdown(message["content"])
+
+# Chat input
+if prompt := st.chat_input("Type your message here..."):
+    # Add user message to chat history
+    st.session_state.messages.append({"role": "user", "content": prompt})
+    
+    # Display user message
+    with st.chat_message("user"):
+        st.markdown(prompt)
+    
+    # Display assistant response
+    with st.chat_message("assistant"):
+        message_placeholder = st.empty()
+        
+        # Simulate streaming response (replace with actual API call)
+
+        full_response = BDAgent.main(prompt,str(st.session_state.messages),selected_value)
+        
+        # Simulate typing effect
+        displayed_response = ""
+        for char in full_response:
+            displayed_response += char
+            message_placeholder.markdown(displayed_response + "▌")
+            time.sleep(0.01)
+        
+        message_placeholder.markdown(full_response)
+    
+    # Add assistant response to chat history
+    st.session_state.messages.append({"role": "assistant", "content": full_response})
+
+# Add a sidebar with options
+with st.sidebar:
+    st.header("Options")
+    
+    if st.button("Clear Chat History"):
+        st.session_state.messages = []
+        st.rerun()
+    
+    st.divider()
+    
+    st.markdown("""
+    ### How to use:
+    1. Type your message in the input box
+    2. Press Enter or click Send
+    3. View the conversation history
+    """)