Add JMA Haneda temps and fix stale detail loading

frontend/components/dashboard/Dashboard.module.css

@@ -961,6 +961,10 @@
   gap: 8px;
 }
 
+.root :global(.forecast-inline-note) {
+  line-height: 1.45;
+}
+
 .root :global(.forecast-day) {
   background: rgba(255, 255, 255, 0.03);
   border: 1px solid var(--border-subtle);
@@ -1000,6 +1004,31 @@
   color: var(--accent-cyan);
 }
 
+@media (max-width: 720px) {
+  .root :global(.forecast-table) {
+    display: flex;
+    gap: 10px;
+    overflow-x: auto;
+    padding-bottom: 4px;
+    scroll-snap-type: x proximity;
+  }
+
+  .root :global(.forecast-table::-webkit-scrollbar) {
+    height: 6px;
+  }
+
+  .root :global(.forecast-table::-webkit-scrollbar-thumb) {
+    background: rgba(148, 163, 184, 0.32);
+    border-radius: 999px;
+  }
+
+  .root :global(.forecast-day) {
+    flex: 0 0 112px;
+    min-width: 112px;
+    scroll-snap-align: start;
+  }
+}
+
 .root :global(.sun-info) {
   margin-top: 10px;
   font-size: 12px;

frontend/components/dashboard/PanelSections.tsx

@@ -724,6 +724,7 @@ export function ForecastTable() {
   if (!data) return null;
 
   const daily = data.forecast?.daily || [];
+  const isSparseDaily = daily.length <= 1;
   const resolveForecastTemp = (date: string, fallback: number | null | undefined) => {
     const debPrediction = data.multi_model_daily?.[date]?.deb?.prediction;
     return debPrediction ?? fallback ?? null;
@@ -731,6 +732,20 @@ export function ForecastTable() {
   return (
     <section className="forecast-section">
       <h3>{t("forecast.title")}</h3>
+      {isSparseDaily && (
+        <div
+          className="forecast-inline-note"
+          style={{
+            color: "var(--text-secondary)",
+            fontSize: "12px",
+            marginBottom: "10px",
+          }}
+        >
+          {store.loadingState.cityDetail
+            ? "多日预报同步中，正在刷新完整日序列。"
+            : "当前只收到当日预报，其他日期结果暂未回传。"}
+        </div>
+      )}
       <div className="forecast-table">
         {daily.length === 0 ? (
           <EmptyState text={t("forecast.empty")} />

frontend/components/dashboard/PolyWeatherDashboard.tsx

@@ -77,7 +77,8 @@ function DashboardScreen() {
   // Avoid full-page flashing on initial load; only show this overlay for manual refresh.
   const showLoading =
     store.loadingState.cities ||
-    store.loadingState.refresh;
+    store.loadingState.refresh ||
+    store.loadingState.cityDetail;
 
   return (
     <div className={styles.root}>