袁聪的第三次提交，API接口完善

tests/integration/test_offsite_nl2sql_fields.py

@@ -156,6 +156,43 @@ async def _seed_failed_queries(task_id: str) -> None:
         ))
 
 
+async def _seed_latest_success_after_failure(task_id: str) -> None:
+    await _seed_failed_queries(task_id)
+    now = datetime.now(UTC).replace(tzinfo=None)
+    async with SessionFactory() as session, session.begin():
+        session.add(OffsiteQueryRecord(
+            task_id=task_id,
+            rule_code="subscription_holding_ratio",
+            natural_language_request="基金代码为15911，查询基金最新总份额、最新净值和申请前持有份额",
+            script_path="nl2sql_yc.py",
+            result_summary={
+                "status": "success",
+                "data": {"total": 1, "rows": [{
+                    "nav": "1.250000",
+                    "total_fund_shares": "10000000000.0000",
+                    "total_quantity": "100000000.0000",
+                }]},
+            },
+            status="success",
+            error_message=None,
+            created_at=now,
+        ))
+        rule_result = await session.scalar(select(OffsiteRuleResult).where(
+            OffsiteRuleResult.task_id == task_id,
+            OffsiteRuleResult.rule_code == "subscription_holding_ratio",
+        ))
+        assert rule_result is not None
+        rule_result.result = "正常"
+        rule_result.document_value = {"申购金额元": "200000000.00"}
+        rule_result.database_value = {
+            "最新净值": "1.250000",
+            "基金最新总份额": "10000000000.0000",
+            "申请前持有份额": "100000000.0000",
+        }
+        rule_result.calculation = {"申购后持有比例": "0.026"}
+        rule_result.created_at = now
+
+
 async def _count_audit(action_type: str) -> int:
     async with SessionFactory() as session:
         rows = await session.execute(select(InteractionAudit).where(
@@ -244,6 +281,31 @@ async def test_nl2sql_fields_mark_query_failed_when_query_blocked() -> None:
         TRACE_ID = ""
 
 
+@pytest.mark.integration
+async def test_nl2sql_fields_show_only_latest_attempt_per_rule() -> None:
+    """重试成功后，页面不能继续展示同一规则的历史失败状态。"""
+    global TRACE_ID
+    TRACE_ID = f"trace-nl2sql-latest-attempt-{uuid4()}"
+    task_id = ""
+    try:
+        task_id = await _seed_document("subscription")
+        await _seed_latest_success_after_failure(task_id)
+        _install_context(("operator",), ("offsite:read",))
+        response = await _get_fields(task_id)
+
+        assert response.status_code == 200
+        data = response.json()["data"]
+        assert len(data["queries"]) == 1
+        assert data["queries"][0]["rule_code"] == "subscription_holding_ratio"
+        assert data["queries"][0]["status"] == "success"
+        assert data["queries"][0]["row_count"] == 1
+        assert data["field_status"]["最新净值"] == "success"
+    finally:
+        await _cleanup(task_id)
+        app.dependency_overrides.clear()
+        TRACE_ID = ""
+
+
 @pytest.mark.integration
 async def test_nl2sql_fields_mark_pending_before_verification() -> None:
     """尚未触发核对时字段为空，必须标为 pending，不能伪装成查询失败。"""