From a9ed45a3d3ce31852975cf500e72919d25f39685 Mon Sep 17 00:00:00 2001
From: "2569718930@qq.com" <2569718930@qq.com>
Date: Tue, 16 Jun 2026 05:43:19 +0800
Subject: [PATCH] =?UTF-8?q?=E4=BF=AE=E5=A4=8D=E5=9B=BE=E8=A1=A8=20referenc?=
 =?UTF-8?q?e-only=20=E5=8A=A0=E8=BD=BD=E5=8A=A8=E7=94=BB?=
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---
 .../scan-terminal/TemperatureChartCanvas.tsx  | 24 +++++++++++++++++--
 .../__tests__/terminalGridPolicy.test.ts      |  4 ++--
 2 files changed, 24 insertions(+), 4 deletions(-)

diff --git a/frontend/components/dashboard/scan-terminal/TemperatureChartCanvas.tsx b/frontend/components/dashboard/scan-terminal/TemperatureChartCanvas.tsx
index 4646ea4f..a6c254e2 100644
--- a/frontend/components/dashboard/scan-terminal/TemperatureChartCanvas.tsx
+++ b/frontend/components/dashboard/scan-terminal/TemperatureChartCanvas.tsx
@@ -50,6 +50,26 @@ function hasDrawableTemperatureChartContent({
   );
 }
 
+function isFallbackReferenceSeries(series: EvidenceSeries) {
+  return series.key === "current" && series.label === "Current reference";
+}
+
+function hasDrawablePrimaryTemperatureChartContent({
+  activeSeries,
+  probabilityOverlay,
+  zoomedData,
+}: {
+  activeSeries: EvidenceSeries[];
+  probabilityOverlay: ProbabilityOverlay | null;
+  zoomedData: Array<Record<string, any>>;
+}) {
+  return hasDrawableTemperatureChartContent({
+    activeSeries: activeSeries.filter((series) => !isFallbackReferenceSeries(series)),
+    probabilityOverlay,
+    zoomedData,
+  });
+}
+
 function shouldKeepTemperatureChartLoading({
   row,
   isHourlyLoading,
@@ -65,7 +85,7 @@ function shouldKeepTemperatureChartLoading({
 }) {
   if (!row?.city) return false;
   if (!isHourlyLoading) return false;
-  return !hasDrawableTemperatureChartContent({ activeSeries, probabilityOverlay, zoomedData });
+  return !hasDrawablePrimaryTemperatureChartContent({ activeSeries, probabilityOverlay, zoomedData });
 }
 
 function TemperatureChartSkeleton({ compact }: { compact: boolean }) {
@@ -225,7 +245,7 @@ function TemperatureChartCanvasComponent({
   });
   const shouldRenderChart = canRenderChart && hasDrawableChartContent;
   const shouldShowEmptyState = Boolean(row?.city) && !isHourlyLoading && !hasDrawableChartContent;
-  const shouldShowBackgroundRefresh = isHourlyLoading && hasDrawableChartContent;
+  const shouldShowBackgroundRefresh = isHourlyLoading && hasDrawableChartContent && !shouldShowChartLoading;
   const shouldShowUnavailableState = Boolean(row?.city) && Boolean(detailError) && !isHourlyLoading && !hasDrawableChartContent;
   const shouldShowBackgroundError =
     showDetailErrorBadge && Boolean(row?.city) && !isHourlyLoading && hasDrawableChartContent &&
diff --git a/frontend/components/dashboard/scan-terminal/__tests__/terminalGridPolicy.test.ts b/frontend/components/dashboard/scan-terminal/__tests__/terminalGridPolicy.test.ts
index 87b35d13..eb48829d 100644
--- a/frontend/components/dashboard/scan-terminal/__tests__/terminalGridPolicy.test.ts
+++ b/frontend/components/dashboard/scan-terminal/__tests__/terminalGridPolicy.test.ts
@@ -265,7 +265,7 @@ export function runTests() {
     "temperature chart should render once a visible series has drawable values",
   );
   assert(
-    !__shouldKeepTemperatureChartLoadingForTest({
+    __shouldKeepTemperatureChartLoadingForTest({
       row: { city: "Moscow" } as any,
       isHourlyLoading: true,
       activeSeries: [
@@ -283,6 +283,6 @@ export function runTests() {
         { label: "05:00", ts: 2, current: 13 },
       ],
     }),
-    "temperature chart must render seeded or cached data immediately while full detail continues loading in the background",
+    "temperature chart should keep the loading overlay when the only drawable series is the fallback Current reference line",
   );
 }