From 9c9924cc5a85e0bd92bfa649287879c362dd07cd Mon Sep 17 00:00:00 2001
From: "2569718930@qq.com" <2569718930@qq.com>
Date: Mon, 25 May 2026 20:16:50 +0800
Subject: [PATCH] =?UTF-8?q?=E6=89=AB=E6=8F=8F=E7=BC=93=E5=AD=98=E9=94=AE?=
 =?UTF-8?q?=E6=8C=89=E5=8C=BA=E5=9F=9F=E9=9A=94=E7=A6=BB=EF=BC=8C=E4=BF=AE?=
 =?UTF-8?q?=E5=A4=8D=E5=88=87=E6=8D=A2=E5=8C=BA=E5=9F=9F=E6=97=B6=E6=98=BE?=
 =?UTF-8?q?=E7=A4=BA=E6=97=A7=E5=8C=BA=E5=9F=9F=E6=95=B0=E6=8D=AE=E7=9A=84?=
 =?UTF-8?q?=E9=97=AE=E9=A2=98?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../scan-terminal/use-scan-terminal-query.ts   | 18 +++++++++++-------
 1 file changed, 11 insertions(+), 7 deletions(-)

diff --git a/frontend/components/dashboard/scan-terminal/use-scan-terminal-query.ts b/frontend/components/dashboard/scan-terminal/use-scan-terminal-query.ts
index 369aa605..22ba9793 100644
--- a/frontend/components/dashboard/scan-terminal/use-scan-terminal-query.ts
+++ b/frontend/components/dashboard/scan-terminal/use-scan-terminal-query.ts
@@ -10,12 +10,16 @@ import {
 import { useRemoteDataQuery } from "@/components/dashboard/scan-terminal/use-remote-data-query";
 import type { ScanTerminalResponse } from "@/lib/dashboard-types";
 
-const SCAN_CACHE_KEY = "polyweather_scan_v1";
+const SCAN_CACHE_PREFIX = "polyweather_scan_v2";
 const SCAN_CACHE_TTL_MS = 2 * 60 * 1000; // 2 min — cities list instant on revisit
 
-function readScanCache(): ScanTerminalResponse | null {
+function scanCacheKey(tradingRegion: string): string {
+  return `${SCAN_CACHE_PREFIX}:${tradingRegion || "all"}`;
+}
+
+function readScanCache(tradingRegion: string): ScanTerminalResponse | null {
   try {
-    const raw = localStorage.getItem(SCAN_CACHE_KEY);
+    const raw = localStorage.getItem(scanCacheKey(tradingRegion));
     if (!raw) return null;
     const cached = JSON.parse(raw);
     if (cached.ts && Date.now() - cached.ts < SCAN_CACHE_TTL_MS && cached.data?.rows) {
@@ -25,8 +29,8 @@ function readScanCache(): ScanTerminalResponse | null {
   return null;
 }
 
-function writeScanCache(data: ScanTerminalResponse) {
-  try { localStorage.setItem(SCAN_CACHE_KEY, JSON.stringify({ ts: Date.now(), data })); } catch { /* ignore */ }
+function writeScanCache(data: ScanTerminalResponse, tradingRegion: string) {
+  try { localStorage.setItem(scanCacheKey(tradingRegion), JSON.stringify({ ts: Date.now(), data })); } catch { /* ignore */ }
 }
 
 export function useScanTerminalQuery({
@@ -52,7 +56,7 @@ export function useScanTerminalQuery({
 
   const lastForcedScanRefreshAtRef = useRef(0);
   const [cachedRows, setCachedRows] = useState<ScanTerminalResponse | null>(() => {
-    if (typeof window !== "undefined") return readScanCache();
+    if (typeof window !== "undefined") return readScanCache(tradingRegion || "");
     return null;
   });
 
@@ -80,7 +84,7 @@ export function useScanTerminalQuery({
             tradingRegion,
           }),
         showLoading,
-        onSuccess: (data) => { writeScanCache(data); setCachedRows(data); },
+        onSuccess: (data) => { writeScanCache(data, tradingRegion || ""); setCachedRows(data); },
       });
     },
     [isPro, proAccessLoading, run, timezoneOffsetSeconds, tradingRegion],