refactor: update configuration loading and ensure directory existence across modules

app.py

@@ -1,7 +1,7 @@
 #!.venv/bin/python3
 import streamlit as st
 
-from core.config import setup_config
+from core.config import get_config
 from core.utils.data_loader import DataLoader
 from interface.configuration import Configuration
 from interface.dashboard import Dashboard
@@ -26,7 +26,7 @@ st.set_page_config(
 @st.cache_data
 def load_config():
     """Load application configuration with unified setup"""
-    return setup_config(env="development")
+    return get_config()
 
 
 class StreamlitApp: