- Updated tests to use NOTELEAF_CONFIG and NOTELEAF_DATA_DIR environment variables instead of XDG_CONFIG_HOME. - getEditor method in NoteHandler prioritizes config settings over environment variables. - Modified LoadConfig and SaveConfig functions to respect NOTELEAF_CONFIG for custom configuration paths. - Implemented GetDataDir function to handle NOTELEAF_DATA_DIR for data directory management. - Adjusted database initialization to utilize new configuration paths and ensure directory creation. - Improved error handling in database operations and ensured proper cleanup in tests.