fix: prevent segfault and CDockManager teardown crashes with PySide6 6.11.0

- bec_widget.py: set _destroyed=True BEFORE calling cleanup() so the flag
  is available throughout the entire teardown phase
- bec_console.py: in _parking_parent, skip console.window() as parking
  target when the window is marked as _destroyed, preventing setParent()
  into a widget mid-destruction (segfault in PySide6 6.11.0)
- basic_dock_area.py: add DockAreaWidget.cleanup() that calls delete_all()
  first to release CDockWidgets via the Qt ADS API before BECWidget.cleanup()
  runs, fixing teardown crashes with PySide6-QtAds 4.5.x

bec_widgets/utils/bec_widget.py

@@ -362,7 +362,7 @@ class BECWidget(BECConnector):
         """Wrap the close even to ensure the rpc_register is cleaned up."""
         try:
             if not self._destroyed:
-                self.cleanup()
                 self._destroyed = True
+                self.cleanup()
         finally:
             super().closeEvent(event)  # pylint: disable=no-member

bec_widgets/widgets/containers/dock_area/basic_dock_area.py

@@ -1465,6 +1465,16 @@ class DockAreaWidget(BECWidget, QWidget):
         for dock in self.dock_list():
             self._delete_dock(dock)
 
+    def cleanup(self):
+        """Tear down all docks via the Qt ADS API before the base BECWidget cleanup runs.
+
+        Explicitly releasing dock widgets through the CDockManager API first prevents crashes
+        in PySide6 6.11.0 / PySide6-QtAds 4.5.x where the CDockManager destructor interacts
+        badly with dock widgets that are deleted outside of it.
+        """
+        self.delete_all()
+        super().cleanup()
+
 
 if __name__ == "__main__":  # pragma: no cover
     import sys

bec_widgets/widgets/editors/bec_console/bec_console.py

@@ -120,7 +120,12 @@ class BecConsoleRegistry:
             return None
 
         window = console.window()
-        if window is not None and window is not console and self._is_valid_qobject(window):
+        if (
+            window is not None
+            and window is not console
+            and self._is_valid_qobject(window)
+            and not getattr(window, "_destroyed", False)
+        ):
             return window
 
         if not avoid_console: