Refactor welcome message formatting in Streamlit app for improved readability

src/streamlit_app.py

@@ -211,14 +211,14 @@ def main():
     
     # Display welcome message
     if not st.session_state.messages:
-            welcome_msg = """👋 **Welcome to Blue Bean Data!**
-    
-    I'm your AI assistant. Ask me about:
-    • Our data consulting services & expertise  
-    • The Blue Bean Data team  
-    • Or leave your contact details for a follow-up
-    
-    How can I assist you today?"""
+        welcome_msg = (
+            "👋 **Welcome to Blue Bean Data!**\n\n"
+            "I'm your AI assistant. Ask me about:\n"
+            "- Our data consulting services & expertise  \n"
+            "- The Blue Bean Data team  \n"
+            "- Or leave your contact details for a follow-up\n\n"
+            "How can I assist you today?"
+        )
     
     st.session_state.messages.append({"role": "assistant", "content": welcome_msg})