修复 shenzhen 重复键，移除旧 ZGSZ 条目

frontend/lib/dashboard-official-sources.ts

@@ -593,23 +593,6 @@ const CITY_SPECIFIC_SOURCES: Record<string, OfficialSourceLink[]> = {
       kind: "metar",
     },
   ],
-  shenzhen: [
-    {
-      label: "NMC 深圳天气",
-      href: "https://m.nmc.cn/publish/forecast/AGD/shenzuo.html",
-      kind: "agency",
-    },
-    {
-      label: "深圳宝安国际机场",
-      href: "https://www.szairport.com/",
-      kind: "airport",
-    },
-    {
-      label: "ZGSZ METAR",
-      href: "https://aviationweather.gov/data/metar/?id=ZGSZ&decoded=1&taf=1",
-      kind: "metar",
-    },
-  ],
   qingdao: [
     {
       label: "Wunderground ZSQD",

frontend/lib/scan-market-focus.ts

@@ -89,7 +89,6 @@ const CITY_REGION_FALLBACK: Record<string, MarketRegionKey> = {
   seoul: "asia_pacific",
   busan: "asia_pacific",
   "hong kong": "asia_pacific",
-  "shenzhen": "asia_pacific",
   taipei: "asia_pacific",
   shanghai: "asia_pacific",
   singapore: "asia_pacific",