refactor: update application name and enhance header display in Streamlit app

src/app.py

@@ -85,6 +85,7 @@ def init_session_state():
                 base_url=base_url,
             )
             st.session_state.model_name = model_name
+            st.session_state.provider_name = provider_name  # Store provider name
             logger.info("LLMClient initialized successfully.")
 
         except Exception as e:
@@ -182,9 +183,34 @@ def handle_user_input():
 
 def main():
     """Main function to run the Streamlit app."""
-    st.title("MCP Chat App")  # Updated title
     try:
         init_session_state()
+
+        # --- Display Enhanced Header ---
+        provider_name = st.session_state.get("provider_name", "Unknown Provider")
+        model_name = st.session_state.get("model_name", "Unknown Model")
+        mcp_manager = st.session_state.client.mcp_manager  # Get the manager
+
+        server_count = 0
+        tool_count = 0
+        if mcp_manager and mcp_manager.initialized:
+            server_count = len(mcp_manager.servers)
+            try:
+                # Get tool count (might be slightly slow if many tools/servers)
+                tool_count = len(mcp_manager.list_all_tools())
+            except Exception as e:
+                logger.warning(f"Could not retrieve tool count for header: {e}")
+                tool_count = "N/A"  # Display N/A if listing fails
+
+        # Display the new header format
+        st.markdown(f"# Say Hi to **{provider_name.capitalize()}**!")
+        st.write(f"MCP Servers: **{server_count}** | Tools: **{tool_count}**")
+        st.write(f"Model: **{model_name}**")
+        st.divider()
+        # -----------------------------
+
+        # Removed the previous caption display
+
         display_chat_messages()
         handle_user_input()
     except Exception as e: