fix: 无本地同地区基准时自相关通过并记为零

AGENTS.md

@@ -11,3 +11,12 @@
 ### Domain docs
 
 采用 single-context 布局。探索代码库前，阅读 `docs/agents/domain.md`，并按其规则加载领域文档。
+
+### Semi MCP
+
+新增或调整 Semi UI 组件用法（属性、布局、对齐、状态展示、交互、主题样式），排查组件专属行为或进行版本迁移时，优先使用 `semi-mcp` 核对文档与示例。纯业务逻辑修改不触发此查询。
+
+- 先从项目依赖及锁文件确认实际版本，发现当前可用的 Semi MCP 工具，再按该版本调用 `get_semi_document`；示例被折叠时使用 `get_semi_code_block`。
+- 文档不足以解释行为时，使用 `get_component_file_list` 定位文件，再按需调用 `get_file_code` 或 `get_function_code` 核对实现。
+- 优先采用组件原生能力，例如 `Descriptions` 的对齐与列数属性、在 `value` 中使用 `Tag` 展示状态；确认原生能力不足后再添加局部样式。
+- 工具不可用或目标版本缺失时，说明限制，改查 Semi 官方文档及本机对应版本源码、类型定义；标明版本差异。已有有效查询结果可在当前任务中复用，实际效果仍需通过适当的类型检查或浏览器验证确认。

backend/app/jobs.py

@@ -515,7 +515,7 @@ class Runner:
     async def check_correlations(self, job_id, alpha_ids):
         """Check fixed targets against same-region submitted caches, with per-target recovery.
 
-        Missing references are reported as incomplete coverage. Authentication,
+        An empty same-region reference set passes locally with correlation zero. Authentication,
         transient upstream errors and cancellation retain the task for retry.
         """
         await self.checkpoint(job_id, {"total": len(alpha_ids)})
@@ -564,7 +564,12 @@ class Runner:
                     result["reason"] = "平台未提供目标 Alpha 的地区"
                 elif not reference_ids:
                     result = calculate_correlation([], [])
-                    result["reason"] = "没有同地区已提交 Alpha 可供比较，请先同步已提交 Alpha"
+                    # A local policy default, not a measured Pearson coefficient.
+                    result.update(
+                        status="low",
+                        max_correlation=0.0,
+                        reason="没有同地区已提交 Alpha 可供比较，按本地规则视为通过，自相关值记为 0",
+                    )
                 else:
                     target = await self.correlation_pnl(job_id, alpha_id)
                     references = []

backend/tests/test_alpha_management.py

@@ -353,3 +353,40 @@ async def test_scoped_date_query_parameters_and_no_platform_check(settings):
     assert "status!" in second and second["hidden"] == "true"
     assert all(r.method == "GET" and r.url.path == "/users/self/alphas" for r in requests)
     await client.close()
+
+
+@pytest.mark.parametrize("region", ["USA", None])
+async def test_empty_region_reference_set_passes_with_zero_but_missing_region_does_not(
+    app, logged_in, region
+):
+    runner = app.state.runner  # No credentials or PnL; this branch must stay local.
+    async with runner.sessions.begin() as db:
+        for raw in (
+            alpha("target", settings={"region": region}),
+            alpha("pending", settings={"region": "USA"}),
+            alpha("other-region", status="ACTIVE", settings={"region": "CHN"}),
+        ):
+            await upsert_alpha(db, raw)
+    job = (
+        await logged_in.post(
+            f"{PREFIX}/sync-jobs", json={"kind": "self_correlation", "alpha_ids": ["target"]}
+        )
+    ).json()
+    await runner.execute(job["id"])
+    assert (await result(runner, job["id"])).status == "completed"
+    report = (await logged_in.get(f"{PREFIX}/alphas/target/self-correlation")).json()["result"]
+    assert report["candidate_count"] == report["compared_count"] == report["skipped_count"] == 0
+    assert report["status"] == ("low" if region else "insufficient_data")
+    assert report["max_correlation"] == (0.0 if region else None)
+    assert not report["stale"] and report["matches"] == []
+    summary = (await logged_in.get(f"{PREFIX}/alphas?q=target")).json()["items"][0]["local_correlation"]
+    assert summary["status"] == report["status"]
+    assert summary["max_correlation"] == report["max_correlation"]
+    state = (await logged_in.get(f"{PREFIX}/alphas/target/submission")).json()
+    assert state["can_check"] is bool(region)
+    if region:
+        async with runner.sessions.begin() as db:
+            await upsert_alpha(db, alpha("new-peer", status="ACTIVE"))
+        report = (await logged_in.get(f"{PREFIX}/alphas/target/self-correlation")).json()["result"]
+        assert report["stale"]
+        assert not (await logged_in.get(f"{PREFIX}/alphas/target/submission")).json()["can_check"]

frontend/src/components/SelfCorrelationPanel.tsx

@@ -100,7 +100,9 @@ export function SelfCorrelationPanel({
                       : "grey"
               }
             >
-              {correlationLabels[result.status]}
+              {result.status === "low" && result.candidate_count === 0
+                ? "通过（无本地基准）"
+                : correlationLabels[result.status]}
             </Tag>
             <span className="muted">
               计算于 {formatTime(result.calculated_at, timezone)}
@@ -139,7 +141,8 @@ export function SelfCorrelationPanel({
           {result.status === "insufficient_data" &&
             result.candidate_count === 0 && (
               <p className="muted">
-                没有本地比较基准时可继续下方的平台提交检查；这不代表已通过相关性检查。
+                若目标地区已提供且没有本地比较基准，重新检测后将按通过处理，自相关值记为
+                0。
               </p>
             )}
           {result.status === "partial" && (