feat: add seat-scoped static and dynamic assistant modes

tests/integration/test_scene_explicit_seat_scope.py

@@ -87,7 +87,10 @@ def test_explicit_scene_seat_scope_rejects_cross_seat_plan_atomically(scene_serv
     assert result.get("command_plans") == {}
     intent = result.get("intent_ir") or {}
     assert (intent.get("spec") or {}).get("actions", []) == []
-    assert any("座位范围" in item["message"] for item in result["validation"])
+    assert any(
+        "座位范围" in item["message"] or item.get("code") == "MODE_SEAT_SCOPE_UNAVAILABLE"
+        for item in result["validation"]
+    )
 
 
 @pytest.mark.parametrize(("message", "scopes"), (
@@ -96,9 +99,9 @@ def test_explicit_scene_seat_scope_rejects_cross_seat_plan_atomically(scene_serv
     ("创建一个仅主驾舒适模式", ("driver",)),
     ("构建一个主驾和副驾座椅舒适模式", ("driver", "passenger")),
     ("构建一个主副驾座椅舒适模式", ("driver", "passenger")),
-    ("构建一个云端座椅舒适模式", ("driver", "passenger")),
-    ("构建一个副驾空调与座椅舒适模式", ("driver", "passenger")),
-    ("构建一个座椅舒适与副驾阅读灯模式", ("driver", "passenger")),
+    ("构建一个云端座椅舒适模式", ("passenger",)),
+    ("构建一个副驾空调与座椅舒适模式", ("passenger",)),
+    ("构建一个座椅舒适与副驾阅读灯模式", ("passenger",)),
     ("构建一个主驾座椅与副驾空调舒适模式", ("driver",)),
     ("构建一个主驾阅读灯与副驾座椅舒适模式", ("passenger",)),
 ))
@@ -120,7 +123,6 @@ def test_scene_scope_preserves_supported_targets_without_borrowing_other_device_
 @pytest.mark.parametrize("message", (
     "构建一个主驾舒适模式，副驾不要动",
     "构建一个主驾舒适模式，不要动副驾",
-    "构建一个舒展模式，座椅靠背调整到45%",
 ))
 def test_explicit_atomic_requirements_do_not_receive_scene_scope_relaxation(
     scene_service, message,
@@ -131,6 +133,19 @@ def test_explicit_atomic_requirements_do_not_receive_scene_scope_relaxation(
     assert result["hardware_execution_allowed"] is False
 
 
+def test_unqualified_explicit_seat_requirement_defaults_to_passenger_without_model_additions(scene_service):
+    result = _preview(scene_service, "构建一个舒展模式，座椅靠背调整到45%", execution_mode="dry_run")
+    assert result["status"] == "succeeded", result.get("validation")
+    assert result["execution_mode"] == "dry_run"
+    assert result["hardware_execution_allowed"] is False
+    assert result["mode_profile_draft"]["operation_count"] == 1
+    actions = result["intent_ir"]["spec"]["actions"]
+    assert len(actions) == 1
+    assert actions[0]["capability"] == "seat.set_backrest_recline"
+    assert actions[0]["target"]["instance"] == "passenger"
+    assert actions[0]["parameters"] == {"position_pct": 45}
+
+
 def test_explicit_atomic_requirements_override_label_without_adding_model_actions(scene_service):
     result = _preview(scene_service, "构建一个主驾舒适模式，副驾靠背调整到45%")
     assert result["status"] == "succeeded"