feat(testing): stabilize simulation suite and fix gemini caching

tests/test_sim_execution.py

@@ -32,21 +32,19 @@ def test_execution_simulation_run():
     }
     mock_client.get_session.return_value = mock_session
 
+    # Mock script confirmation event
+    mock_client.wait_for_event.side_effect = [
+        {"type": "script_confirmation_required", "script": "dir"},
+        None # Second call returns None to end the loop
+    ]
+
     with patch('simulation.sim_base.WorkflowSimulator') as mock_sim_class:
         mock_sim = MagicMock()
         mock_sim_class.return_value = mock_sim
         
-        # We need a way to trigger show_confirm_modal = True
-        # In sim_execution.py, it's called after run_discussion_turn
-        # I'll mock run_discussion_turn to set it
-        def run_side_effect(msg):
-            vals["show_confirm_modal"] = True
-            
-        mock_sim.run_discussion_turn.side_effect = run_side_effect
-        
         sim = ExecutionSimulation(mock_client)
         sim.run()
         
         # Verify calls
-        mock_sim.run_discussion_turn.assert_called()
+        mock_sim.run_discussion_turn_async.assert_called()
         mock_client.click.assert_called_with("btn_approve_script")