fix(tui): replace # type: ignore with setattr in TDD regression test steps

features/steps/tdd_tui_suggestions_query_extraction_4741_steps.py

@@ -1,11 +1,10 @@
 """Step definitions for tdd_tui_suggestions_query_extraction_4741.feature.
 
 Regression test for issue #4741:
-  on_input_submitted must extract only the @token text (without the @ sign and
-  without surrounding non-reference words) as the query passed to suggestions().
-
-  Previously, text.replace("@", "").strip() was used, which corrupted the query
-  by including all non-reference words from the prompt.
+  on_input_submitted must extract only the @token text (without the @
+  sign and without surrounding non-reference words) as the query passed to
+  suggestions(). Previously, text.replace("@", "").strip() was used, which
+  corrupted the query by including all non-reference words from the prompt.
 """
 
 from __future__ import annotations
@@ -91,12 +90,12 @@ def _build_mock_textual_4741() -> dict[str, ModuleType]:
         def __init__(self, *args: object, **kwargs: object) -> None:
             self.text = ""
 
-    mock_textual_app.App = MockApp  # type: ignore[attr-defined]
-    mock_textual_containers.Vertical = MockVertical  # type: ignore[attr-defined]
-    mock_textual_widgets.Header = MockHeader  # type: ignore[attr-defined]
-    mock_textual_widgets.Footer = MockFooter  # type: ignore[attr-defined]
-    mock_textual_widgets.Static = MockStatic  # type: ignore[attr-defined]
-    mock_textual_widgets.TextArea = MockTextArea  # type: ignore[attr-defined]
+    setattr(mock_textual_app, "App", MockApp)
+    setattr(mock_textual_containers, "Vertical", MockVertical)
+    setattr(mock_textual_widgets, "Header", MockHeader)
+    setattr(mock_textual_widgets, "Footer", MockFooter)
+    setattr(mock_textual_widgets, "Static", MockStatic)
+    setattr(mock_textual_widgets, "TextArea", MockTextArea)
 
     return {
         "textual": mock_textual,