Run ruff format changes and finalize indentation and lint fixes.

scripts/test_arc_headers.py

@@ -1,13 +1,22 @@
 #!/usr/bin/env python3
 """Test script to check table header visibility in Arc theme."""
+# ruff: noqa: E402
 
 import sys
 import tkinter as tk
 from pathlib import Path
 from tkinter import ttk
 
-from init import logger
-from theme_manager import ThemeManager
+# Ensure the 'src' directory is on sys.path so 'thechart' package is importable
+SRC_DIR = Path(__file__).resolve().parent.parent / "src"
+if str(SRC_DIR) not in sys.path:
+    sys.path.insert(0, str(SRC_DIR))
+
+from thechart.core.constants import LOG_LEVEL
+from thechart.core.logger import init_logger
+from thechart.ui import ThemeManager
+
+logger = init_logger(__name__, testing_mode=(LOG_LEVEL == "DEBUG"))
 
 # Add src directory to Python path
 src_path = Path(__file__).parent / "src"