new tool for quitting app from child windows

src/tools/utils.py

@@ -1,5 +1,6 @@
 import sys
 from pathlib import Path
+from PySide6.QtWidgets import QApplication
 
 PROJECT_ROOT = Path(__file__).resolve().parents[2]
 
@@ -17,3 +18,10 @@ def get_executable_dir() -> Path:
         # sys.executable est le chemin complet vers l'application .exe
         return Path(sys.executable).parent.resolve()
     return Path(__file__).resolve().parents[2]
+
+def quit_application(exit_code: int = 0) -> None:
+    app = QApplication.instance()
+    if app is not None:
+        app.closeAllWindows()
+        app.exit(exit_code)
+    sys.exit(exit_code)