feat: Implement core data models, backend services for weather and market data, and initial dashboard components.

frontend/components/dashboard/GuideModal.tsx

@@ -14,7 +14,7 @@ const GUIDE_CARDS = {
       title: "结算概率引擎",
     },
     {
-      body: "Polymarket 结算逻辑以机场 METAR 为主。系统优先使用 Aviation Weather API 的机场报文与原始 METAR，并区分观测时间与接收时间，避免把发布延迟误认为温度变化。",
+      body: "结算源按城市市场定义：米兰(LIMC)、华沙(EPWA)使用机场 METAR；香港市场使用香港天文台(HKO)；台北市场使用交通部中央气象署(CWA)。系统仍会保留 METAR/MGM 作为临近结构参考，并区分观测时间与接收时间。",
       title: "结算点与主观测源",
     },
     {
@@ -40,7 +40,7 @@ const GUIDE_CARDS = {
       title: "Settlement Probability Engine",
     },
     {
-      body: "Polymarket settlement follows airport METAR observations. The system prioritizes Aviation Weather API raw METAR and distinguishes observation time from receipt time to avoid misreading publication delay as temperature change.",
+      body: "Settlement source follows market rule by city: Milan (LIMC) and Warsaw (EPWA) settle on airport METAR, Hong Kong settles on HKO, and Taipei settles on CWA. METAR/MGM are still kept for intraday structure tracking with observation time vs receipt time separated.",
       title: "Settlement Source Logic",
     },
     {

frontend/components/dashboard/PanelSections.tsx

@@ -158,6 +158,7 @@ export function HeroSummary() {
   const { weatherIcon, weatherText } = getWeatherSummary(data, locale);
   const metaItems = getHeroMetaItems(data, locale);
   const current = data.current || {};
+  const settlementSource = String(current.settlement_source || "metar").toUpperCase();
   const isMax =
     current.max_so_far != null &&
     current.temp != null &&
@@ -196,7 +197,9 @@ export function HeroSummary() {
         </div>
         <div className="hero-item">
           <span className="label">
-            {locale === "en-US" ? "WU Settlement Ref" : "WU 结算参考"}
+            {locale === "en-US"
+              ? `${settlementSource} Settlement Ref`
+              : `${settlementSource} 结算参考`}
           </span>
           <span className="value highlight">
             {current.wu_settlement != null