袁聪的第二次提交，项目已完整

tests/unit/service/test_promotion_material_access.py

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+import pytest
+
+from app.core.contracts import RequestContext
+from app.service.agent.bootstrap import get_agent_factory
+from app.service.promotion_material_service import PromotionMaterialService
+
+
+@pytest.mark.asyncio
+async def test_promotion_service_uses_dedicated_write_permission(monkeypatch) -> None:
+    observed: list[str] = []
+
+    async def require(context: RequestContext, permission: str, *, admin: bool = False) -> None:
+        del context, admin
+        observed.append(permission)
+
+    monkeypatch.setattr(
+        "app.service.promotion_material_service.AuthorizationService.require",
+        require,
+    )
+
+    await PromotionMaterialService._require(
+        RequestContext(user_id="1", trace_id="promotion-test"),
+        "promotion:write",
+    )
+
+    assert observed == ["promotion:write"]
+
+
+def test_promotion_material_agent_is_registered_in_shared_factory() -> None:
+    definition = get_agent_factory().definition("promotion_material")
+
+    assert definition.agent_type == "promotion_material"
+    assert "operator" in definition.allowed_roles
+    assert "promotion_draft" in definition.supported_intents