test(gui): Fix test_gui_window_controls_minimize_maximize_close unpacking error

Added missing mock for imscope.menu to prevent the test from entering the menu loops which expect valid imgui menu_item tuple return values.

src/ai_client.py

@@ -2580,4 +2580,4 @@ def run_subagent_summarization(file_path: str, content: str, is_code: bool, outl
   return resp_data.get("text", "")
  return "ERROR: Unsupported provider for sub-agent summarization"
 
-#endregion: Subagent Summarization
+#endregion: Subagent Summarization

tests/test_gui_window_controls.py

@@ -19,6 +19,7 @@ def test_gui_window_controls_minimize_maximize_close():
   mock_imscope.table.return_value.__enter__.return_value = True
   mock_imscope.tree_node_ex.return_value.__enter__.return_value = True
   mock_imscope.tab_item.return_value.__enter__.return_value = (True, True)
+  mock_imscope.menu.return_value.__enter__.return_value = False
   mock_imscope.style_color.return_value.__enter__.return_value = None
   mock_imscope.style_var.return_value.__enter__.return_value = None