refactor: remove mock_semantic_engine from q_nav_graph production code

GramAddict/core/q_nav_graph.py

@@ -174,13 +174,13 @@ class QNavGraph:
         success = self.sae.ensure_clear_screen(max_attempts=max_attempts + 5, initial_xml=xml_dump)
         return success
 
-    def _execute_transition(self, action: str, mock_semantic_engine=None, max_retries: int = 2) -> bool:
+    def _execute_transition(self, action: str, max_retries: int = 2) -> bool:
         """
         Executes a transition (e.g. 'tap_explore_tab') using the Telepathic Semantic Engine.
         """
         from GramAddict.core.telepathic_engine import TelepathicEngine
 
-        engine = mock_semantic_engine or TelepathicEngine.get_instance()
+        engine = TelepathicEngine.get_instance()
 
         failed_positions = set()  # Track (x, y) of clicks that failed, for grid retry diversity