style: improve error message wording and test name clarity

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

@@ -403,7 +403,9 @@ class BECDockArea(DockAreaWidget):
         try:
             plugin_widgets_dict = get_all_plugin_widgets().as_dict()
         except (ImportError, AttributeError, RuntimeError):
-            logger.warning("Failed to load plugin widgets for toolbar menu.", exc_info=True)
+            logger.warning(
+                "Failed to discover plugin widgets for toolbar menu.", exc_info=True
+            )
             plugin_widgets_dict = {}
         plugin_actions: dict[str, tuple[str, str, str]] = {
             widget_name: (

tests/unit_tests/test_dock_area.py

@@ -1056,7 +1056,7 @@ class TestToolbarFunctionality:
         # Verify no "menu_plugins" bundle exists in the toolbar
         assert "menu_plugins" not in widget.toolbar.bundles
 
-    def test_plugin_menu_shown_when_plugins_available(self, qtbot, mocked_client, fake_plugin_widget_cls):
+    def test_plugin_menu_includes_available_plugins(self, qtbot, mocked_client, fake_plugin_widget_cls):
         """Test that the plugin menu is shown when plugin widgets are available."""
         with patch(
             "bec_widgets.widgets.containers.dock_area.dock_area.get_all_plugin_widgets"