auf Wrapper umgestellt, tests ergänzt

main.py

@@ -1,6 +1,8 @@
+# sn_plan41/main.py
+
 from qgis.utils import plugins
 from sn_basis.ui.dockmanager import DockManager
-from .ui.dockwidget import DockWidget
+from sn_plan41.ui.dockwidget import DockWidget
 
 
 class Plan41:
@@ -15,14 +17,17 @@ class Plan41:
 
     def initGui(self):
         basis = plugins.get("sn_basis")
-        if basis and basis.ui:
-            self.action = basis.ui.add_action(
-                self.plugin_name,
-                self.run,
-                tooltip=f"Öffnet {self.plugin_name}",
-                priority=20
-            )
-            basis.ui.finalize_menu_and_toolbar()
+        if not basis or not getattr(basis, "ui", None):
+            return
+
+        self.action = basis.ui.add_action(
+            self.plugin_name,
+            self.run,
+            tooltip=f"Öffnet {self.plugin_name}",
+            priority=20,
+        )
+        basis.ui.finalize_menu_and_toolbar()
+        print("Plan41/sn_Basis:initGui called")
 
     def unload(self):
         if self.dockwidget:
@@ -32,13 +37,15 @@ class Plan41:
 
         if self.action:
             basis = plugins.get("sn_basis")
-            if basis and basis.ui:
-                # Action aus Menü und Toolbar entfernen
+            if basis and getattr(basis, "ui", None):
                 basis.ui.remove_action(self.action)
             self.action = None
 
     def run(self):
-        self.dockwidget = DockWidget(self.iface.mainWindow(), subtitle=self.plugin_name)
+        self.dockwidget = DockWidget(
+            self.iface.mainWindow(),
+            subtitle=self.plugin_name,
+        )
         self.dockwidget.setObjectName(self.dock_name)
 
         # Action-Referenz im Dock speichern
@@ -48,5 +55,5 @@ class Plan41:
 
         # Toolbar-Button als aktiv markieren
         basis = plugins.get("sn_basis")
-        if basis and basis.ui:
+        if basis and getattr(basis, "ui", None):
             basis.ui.set_active_plugin(self.action)