test(web): govern performance dashboard windows (#1683)

web/hwlab-cloud-web/scripts/workbench-e2e-server.ts

@@ -227,7 +227,9 @@ async function handleRequest(request: IncomingMessage, response: ServerResponse)
   if (path === "/v1/hwpod-node-ops") return json(response, 200, hwpodNodeOpsPayload());
   if (path === "/v1/web-performance/summary") {
     if (state.scenarioId === "performance-summary-error") return json(response, 503, { ok: false, status: 503, error: { code: "performance_summary_unavailable", message: "performance summary read model is unavailable" } });
-    return json(response, 200, state.scenarioId === "performance-empty" ? webPerformanceEmptyPayload(url) : webPerformanceSummaryPayload(url));
+    if (state.scenarioId === "performance-empty") return json(response, 200, webPerformanceEmptyPayload(url));
+    if (state.scenarioId === "performance-stale-window") return json(response, 200, webPerformanceStaleWindowPayload(url));
+    return json(response, 200, webPerformanceSummaryPayload(url));
   }
   if (path.startsWith("/v1/") || path.startsWith("/auth/") || path.startsWith("/health")) return json(response, 500, { ok: false, status: 500, error: { code: "unmocked_request", path } });
 
@@ -364,6 +366,51 @@ function webPerformanceEmptyPayload(url: URL): JsonRecord {
   };
 }
 
+function webPerformanceStaleWindowPayload(url: URL): JsonRecord {
+  const sampleWindow = fakePerformanceWindow(url.searchParams.get("window"));
+  const rows: JsonRecord[] = [];
+  const collectionHealth = {
+    schemaVersion: "hwlab-web-performance-collection-health-v1",
+    status: "waiting",
+    statusLabel: "等待数据",
+    reason: "no_samples_in_window",
+    reasonLabel: "当前窗口暂无样本",
+    sampleCount: 0,
+    retainedSampleCount: 37,
+    sampleSeries: 0,
+    lowSampleThreshold: 5,
+    firstSampleAt: null,
+    lastSampleAt: null,
+    lastRetainedSampleAt: "2026-06-18T03:20:00.000Z",
+    secondsSinceLastSample: 4200,
+    windowCoverageSeconds: null,
+    sourceFamilyCounts: [{ sourceFamily: "web", rowCount: 0, sampleCount: 37 }],
+    unknownAttribution: { workbenchRows: 0, rowsWithUnknown: 0, samplesWithUnknown: 0, backendUnknownRows: 0, transportUnknownRows: 0 },
+    diagnostics: [{ code: "no_samples_in_window", label: "当前窗口无样本", tone: "warn", detail: "保留样本存在，但当前窗口没有性能样本。" }]
+  };
+  return {
+    ok: true,
+    status: "waiting",
+    source: "fake-server",
+    observedAt: sampleWindow.generatedAt,
+    namespace: "hwlab-v03",
+    gitopsTarget: "D601/v03",
+    sampleWindow: performanceSampleWindowPayload(sampleWindow),
+    summary: performanceSummaryContract(sampleWindow, rows, { status: "waiting", sampleCount: 0, retainedSampleCount: 37, sampleSeries: 0, problemCount: 0 }),
+    backendEvidence: { schemaVersion: "hwlab-backend-performance-evidence-v1", source: "fake-server-backend-performance-store", observedAt: sampleWindow.generatedAt, sampleCount: 0, retainedSampleCount: 37, routeCount: 0, rows: [], available: true, valuesRedacted: true },
+    collectionHealth,
+    dashboard: webPerformanceDashboardPayload(rows, sampleWindow, collectionHealth),
+    rows,
+    problems: [],
+    webVitals: [],
+    apiRoutes: [],
+    longTasks: [],
+    workbenchJourneys: [],
+    workbenchEventPhases: [],
+    workbenchBackendEvents: []
+  };
+}
+
 function performanceRow(row: JsonRecord, sampleWindow: FakePerformanceWindow): JsonRecord {
   const count = Number(row.count ?? 0);
   const sampleState = count === 0 ? "empty" : count < 5 ? "low-sample" : "ok";