new feature: frontend with separated responses

tests/migration/test_vloop_transaction_confirmation_bypass.py

@@ -32,6 +32,48 @@ async def test_vloop_reads_awaiting_confirmation_from_active_transaction():
     assert decision.metadata["mechanism"] == "deterministic_transaction_bypass"
 
 
+@pytest.mark.asyncio
+async def test_vloop_allows_repeated_parameter_during_transaction_collection():
+    rail = LoopRail()
+    decision = await rail.evaluate(
+        "PED-1001",
+        {
+            "transaction_status": "COLLECTING_PARAMETERS",
+            "missing_parameters": ["order_id"],
+            "history_texts": ["PED-1001", "outra fala", "PED-1001"],
+        },
+    )
+    assert decision.allowed is True
+    assert decision.reason == "continuidade_transacional:COLLECTING_PARAMETERS"
+    assert decision.metadata["repeated"] is False
+    assert decision.metadata["mechanism"] == "deterministic_transaction_bypass"
+    assert decision.metadata["transaction_status"] == "COLLECTING_PARAMETERS"
+
+
+@pytest.mark.asyncio
+async def test_vloop_prefers_latest_live_mcp_transaction_over_stale_completed_status():
+    rail = LoopRail()
+    decision = await rail.evaluate(
+        "sim",
+        {
+            "transaction_status": "COMPLETED",
+            "active_transaction": {"status": "COMPLETED"},
+            "mcp_results": [
+                {"tool_name": "devolver_pedido", "transaction_status": "COMPLETED"},
+                {
+                    "tool_name": "cancelar_pedido",
+                    "transaction_status": "AWAITING_CONFIRMATION",
+                    "awaiting_confirmation": True,
+                },
+            ],
+            "history_texts": ["sim", "outra fala", "sim"],
+        },
+    )
+    assert decision.allowed is True
+    assert decision.metadata["mechanism"] == "deterministic_transaction_bypass"
+    assert decision.metadata["transaction_status"] == "AWAITING_CONFIRMATION"
+
+
 @pytest.mark.asyncio
 async def test_vloop_still_blocks_actual_repetition_outside_transaction_confirmation():
     rail = LoopRail()