diff --git a/frontend/components/dashboard/scan-terminal/LiveTemperatureThresholdChart.tsx b/frontend/components/dashboard/scan-terminal/LiveTemperatureThresholdChart.tsx
index 0f0c549c..72057703 100644
--- a/frontend/components/dashboard/scan-terminal/LiveTemperatureThresholdChart.tsx
+++ b/frontend/components/dashboard/scan-terminal/LiveTemperatureThresholdChart.tsx
@@ -475,7 +475,7 @@ export function LiveTemperatureThresholdChart({
                 : "text-slate-500 hover:text-slate-800"
             )}
           >
-            {mode === "auto" ? (isEn ? "Auto" : "高温") : (isEn ? "Full" : "全天")}
+            {mode === "auto" ? (isEn ? "Peak" : "高温") : (isEn ? "All Day" : "全天")}
           </button>
         ))}
       </div>
diff --git a/frontend/components/dashboard/scan-terminal/__tests__/ssePatchArchitecture.test.ts b/frontend/components/dashboard/scan-terminal/__tests__/ssePatchArchitecture.test.ts
index 16d67639..12a220a4 100644
--- a/frontend/components/dashboard/scan-terminal/__tests__/ssePatchArchitecture.test.ts
+++ b/frontend/components/dashboard/scan-terminal/__tests__/ssePatchArchitecture.test.ts
@@ -138,6 +138,14 @@ export function runTests() {
   );
   assert(chart.includes("viewMode"), "temperature chart must expose a view mode for DEB-peak auto view versus full-day view");
   assert(chart.includes("getDebPeakWindowRange"), "temperature chart must derive its default view from the DEB peak window");
+  assert(
+    chart.includes('isEn ? "Peak" : "高温"') && chart.includes('isEn ? "All Day" : "全天"'),
+    "temperature chart view-mode labels must translate 高温/全天 as Peak/All Day",
+  );
+  assert(
+    !chart.includes('isEn ? "Auto" : "高温"') && !chart.includes('isEn ? "Full" : "全天"'),
+    "temperature chart view-mode labels must not expose internal Auto/Full wording",
+  );
   assert(chart.includes("nextTargetResolution"), "temperature chart must derive target resolution without setting state on every render");
   assert(
     chart.includes("targetResolution !== nextTargetResolution"),