Fixing deployment issues:

- fixing nested json problem

visualization/pages/1_Campaign_Builder.py

@@ -160,8 +160,8 @@ def render_configuration_section(prefix: str, col_container, initial_config=None
             st.success(f"✅ Loaded: **{selected_config_name}**")
 
             # Show config preview
-            with st.expander("📄 View Configuration Details"):
-                st.json(loaded_config)
+            # with st.expander("📄 View Configuration Details"):
+            #     st.json(loaded_config)
 
         st.markdown("---")