AMOS 跑道温度范围：城市决策卡头部展示"跑道实况 14.6~15.2℃"

后端：
- amos_station_sources.py 新增 runway_temp_range (跑道温度 min,max)
- 取所有有效跑道温度的最小值和最大值

前端：
- CityCardHeader 新增 observedLabel prop（标签自定义）
- 有 AMOS 数据时显示"跑道实况"替代"当前温度"
- 温度展示格式：14.6~15.2℃（跑道温度范围）
- 无 AMOS 时回退原有 METAR 温度显示

frontend/components/dashboard/scan-terminal/AiPinnedCityCard.tsx

@@ -388,8 +388,11 @@ export function AiPinnedCityCard({
     decisionExpectedHighNumber != null
       ? formatTemperatureValue(decisionExpectedHighNumber, tempSymbol, { digits: 1 })
       : "--";
-  const currentTempText =
-    currentTempNumber != null
+  const amosRange = detail?.amos?.runway_temp_range;
+  const observedLabel = amosRange ? (isEn ? "Runway" : "跑道实况") : undefined;
+  const currentTempText = amosRange
+    ? `${amosRange[0].toFixed(1)}~${amosRange[1].toFixed(1)}${tempSymbol}`
+    : currentTempNumber != null
       ? formatTemperatureValue(currentTempNumber, tempSymbol, { digits: 1 })
       : "--";
   const debText =
@@ -597,6 +600,7 @@ export function AiPinnedCityCard({
             collapseId={collapseId}
             collapsed={collapsed}
             currentTempText={currentTempText}
+            observedLabel={observedLabel}
             dataFreshnessRows={dataFreshnessRows}
             debText={debText}
             detailLocalTime={detail?.local_time}

frontend/components/dashboard/scan-terminal/CityCardHeader.tsx

@@ -18,6 +18,7 @@ export function CityCardHeader({
   collapseId,
   collapsed,
   currentTempText,
+  observedLabel,
   dataFreshnessRows,
   debText,
   detailLocalTime,
@@ -40,6 +41,7 @@ export function CityCardHeader({
   collapseId: string;
   collapsed: boolean;
   currentTempText: string;
+  observedLabel?: string;
   dataFreshnessRows: DataFreshnessRow[];
   debText: string;
   detailLocalTime?: string | null;
@@ -76,7 +78,7 @@ export function CityCardHeader({
       <div className="scan-ai-city-hero-side">
         <div className="scan-ai-city-metrics">
           <span>
-            <small>{isEn ? "Observed" : "当前温度"}</small>
+            <small>{observedLabel || (isEn ? "Observed" : "当前温度")}</small>
             <b>{currentTempText}</b>
           </span>
           <span className="primary">