exit_Crash_fix

functions/verfahrensgebiet_manager.py

@@ -171,3 +171,46 @@ def setup_verfahrensgebiet_listener() -> None:
         
     except Exception:
         pass
+
+
+def teardown_verfahrensgebiet_listener() -> None:
+    """
+    Trennt globale Event-Listener vom QgsProject-Singleton.
+
+    Diese Funktion ist idempotent und kann mehrfach aufgerufen werden.
+    """
+    global _listener_installed
+
+    if not _listener_installed:
+        return
+
+    try:
+        project = QgsProject.instance()
+        if project is None:
+            return
+
+        try:
+            project.layersAdded.disconnect(_on_layers_added)
+        except Exception:
+            pass
+
+        try:
+            project.layerRemoved.disconnect(_on_layer_removed)
+        except Exception:
+            pass
+
+        for signal_name in ("readProject", "newProjectCreated", "cleared"):
+            signal = getattr(project, signal_name, None)
+            if signal is None:
+                continue
+            try:
+                signal.disconnect(_on_project_changed)
+            except Exception:
+                pass
+
+    except RuntimeError:
+        pass
+    except Exception:
+        pass
+    finally:
+        _listener_installed = False