fix: address code review feedback - clean up test and add error handling

Agent-Logs-Url: https://github.com/bec-project/bec_widgets/sessions/872a29f8-acdf-42e5-94b9-bad871aef4a0

Co-authored-by: wyzula-jan <133381102+wyzula-jan@users.noreply.github.com>

bec_widgets/widgets/containers/dock_area/dock_area.py

@@ -400,7 +400,11 @@ class BECDockArea(DockAreaWidget):
         _build_menu("menu_utils", "Add Utils ", util_actions)
 
         # Build plugin widget menu (only shown when plugin widgets are available)
-        plugin_widgets_dict = get_all_plugin_widgets().as_dict()
+        try:
+            plugin_widgets_dict = get_all_plugin_widgets().as_dict()
+        except Exception:
+            logger.warning("Failed to load plugin widgets for toolbar menu.", exc_info=True)
+            plugin_widgets_dict = {}
         plugin_actions: dict[str, tuple[str, str, str]] = {
             widget_name: (
                 getattr(widget_cls, "ICON_NAME", "widgets"),

tests/unit_tests/test_dock_area.py

@@ -1043,7 +1043,6 @@ class TestToolbarFunctionality:
     def test_plugin_menu_shown_when_plugins_available(self, qtbot, mocked_client):
         """Test that the plugin menu is shown when plugin widgets are available."""
         from bec_widgets.utils.bec_widget import BECWidget
-        from bec_widgets.utils.plugin_utils import BECClassContainer, BECClassInfo
         from qtpy.QtWidgets import QWidget as _QWidget
 
         class FakePluginWidget(BECWidget, _QWidget):
@@ -1053,15 +1052,9 @@ class TestToolbarFunctionality:
             def __init__(self, parent=None, **kwargs):
                 super().__init__(parent=parent, **kwargs)
 
-        container = BECClassContainer(
-            [BECClassInfo(name="FakePluginWidget", module="fake", file="fake.py", obj=FakePluginWidget)]
-        )
-
         with patch(
             "bec_widgets.widgets.containers.dock_area.dock_area.get_all_plugin_widgets"
         ) as mock_plugins:
-            mock_plugins.return_value = container
-            # Make as_dict() return our fake widget
             container_mock = MagicMock()
             container_mock.as_dict.return_value = {"FakePluginWidget": FakePluginWidget}
             mock_plugins.return_value = container_mock