Rework radar system

python_app/gui/main.py

@@ -3,7 +3,6 @@
 from __future__ import annotations
 
 from contextlib import suppress
-import os
 from pathlib import Path
 import signal
 import sys
@@ -17,20 +16,11 @@ PROJECT_ROOT = Path(__file__).resolve().parents[2]
 if str(PROJECT_ROOT) not in sys.path:
     sys.path.insert(0, str(PROJECT_ROOT))
 
+from python_app.gui.settings_defaults import env_enabled
 from python_app.gui.app_window import AppWindow
 from python_app.gui.theme import apply_light_theme
 
 
-def _is_headless() -> bool:
-    """Return whether the launcher requested a non-interactive deployment."""
-    return os.environ.get("RADAR_SYSTEM_HEADLESS", "").strip().lower() in {
-        "1",
-        "true",
-        "yes",
-        "on",
-    }
-
-
 def _install_unix_signal_handlers(app: QApplication, window: AppWindow) -> None:
     """Route SIGINT and SIGTERM through the Qt event loop into a clean shutdown.
 
@@ -67,7 +57,7 @@ def main() -> int:
     # PyQtGraph foreground controls axis lines, tick text, labels, and titles.
     pg.setConfigOptions(antialias=True, background="#ffffff", foreground="#ffffff")
     window = AppWindow(PROJECT_ROOT)
-    if _is_headless():
+    if env_enabled("RADAR_SYSTEM_HEADLESS"):
         _install_unix_signal_handlers(app, window)
     else:
         window.showMaximized()