Update app.py

app.py

@@ -29,7 +29,7 @@ model_info = {
         "output": "4K"
     },
     "command-r-plus": {
-        "description": "command-r-plus is an alias for command-r-plus-04-2024, so if you use command-r-plus in the API, that’s the model you’re pointing to.",
+        "description": "command-r-plus is an alias for command-r-plus-04-2024, so if you use command-r-plus in the API, that's the model you're pointing to.",
         "context": "128K",
         "output": "4K"
     },
@@ -76,18 +76,28 @@ with st.sidebar:
     st.title("Settings")
     api_key = st.text_input("Cohere API Key", type="password")
     selected_model = st.selectbox("Model", options=list(model_info.keys()))
+    
+    if st.button("Clear Chat"):
+        st.session_state.messages = []
+        st.session_state.first_message_sent = False
+        st.rerun()
+        
     st.divider()
     st.image(AI_PFP, width=60)
     st.subheader(selected_model)
     st.markdown(model_info[selected_model]["description"])
     st.caption(f"Context: {model_info[selected_model]['context']}")
     st.caption(f"Output: {model_info[selected_model]['output']}")
-    st.markdown("Powerd by Cohere's API")
-
-st.title(f"Chat - {selected_model}")
+    st.markdown("Powered by Cohere's API")
 
 if "messages" not in st.session_state:
     st.session_state.messages = []
+    
+if "first_message_sent" not in st.session_state:
+    st.session_state.first_message_sent = False
+
+if not st.session_state.first_message_sent:
+    st.markdown("<h1 style='text-align: center; color: #4a4a4a; margin-top: 100px;'>How can Cohere help you today?</h1>", unsafe_allow_html=True)
 
 for msg in st.session_state.messages:
     with st.chat_message(msg["role"], avatar=USER_PFP if msg["role"] == "user" else AI_PFP):
@@ -98,6 +108,8 @@ if prompt := st.chat_input("Message..."):
         st.error("API key required")
         st.stop()
 
+    st.session_state.first_message_sent = True
+    
     st.session_state.messages.append({"role": "user", "content": prompt})
     with st.chat_message("user", avatar=USER_PFP):
         st.markdown(prompt)
@@ -120,4 +132,4 @@ if prompt := st.chat_input("Message..."):
         st.session_state.messages.append({"role": "assistant", "content": reply})
 
     except Exception as e:
-        st.error(f"Error: {str(e)}")
+        st.error(f"Error: {str(e)}")