feat: Implement core PolyWeather application with city weather query service, trend analysis, data collection, and dashboard UI.

frontend/lib/dashboard-types.ts

@@ -168,12 +168,6 @@ export interface SourceForecasts {
   weather_gov?: {
     forecast_periods?: WeatherGovPeriod[];
   };
-  meteoblue?: {
-    today_high?: number | null;
-    daily_highs?: Array<number | null>;
-    unit?: string | null;
-    url?: string | null;
-  };
 }
 
 export interface DailyModelForecast {

frontend/lib/dashboard-utils.ts

@@ -330,67 +330,18 @@ export function getProbabilityView(detail: CityDetail, targetDate?: string | nul
 }
 
 export function getModelView(detail: CityDetail, targetDate?: string | null) {
-  const toFiniteNumber = (value: unknown): number | null => {
-    if (value === null || value === undefined || value === "") return null;
-    const numeric = Number(value);
-    return Number.isFinite(numeric) ? numeric : null;
-  };
-
-  const pickMeteoblueForDate = (dateStr: string) => {
-    const meteoblue = detail.source_forecasts?.meteoblue;
-    if (!meteoblue) return null;
-
-    const dates = detail.forecast?.daily?.map((item) => item.date) || [];
-    const index = dates.findIndex((date) => date === dateStr);
-    const todayHigh = toFiniteNumber(meteoblue.today_high);
-
-    // Today must always use Meteoblue daily max (today_high) first.
-    if (dateStr === detail.local_date && todayHigh != null) {
-      return todayHigh;
-    }
-
-    const dailyHighs = Array.isArray(meteoblue.daily_highs)
-      ? meteoblue.daily_highs
-      : [];
-    if (index >= 0) {
-      const byDailyHigh = toFiniteNumber(dailyHighs[index]);
-      if (byDailyHigh != null) return byDailyHigh;
-    }
-
-    if (index === 0 && todayHigh != null) return todayHigh;
-
-    return null;
-  };
-
-  const withMeteoblue = (
-    models: Record<string, number | null>,
-    dateStr: string,
-  ) => {
-    const nextModels = { ...models };
-    const existing = toFiniteNumber(nextModels.Meteoblue);
-    if (existing == null) {
-      const meteoblueVal = pickMeteoblueForDate(dateStr);
-      if (meteoblueVal != null) {
-        nextModels.Meteoblue = meteoblueVal;
-      }
-    } else {
-      nextModels.Meteoblue = existing;
-    }
-    return nextModels;
-  };
-
   const date = targetDate || detail.local_date;
   const daily = detail.multi_model_daily?.[date];
   if (daily) {
     return {
       deb: daily.deb?.prediction ?? null,
-      models: withMeteoblue(daily.models || {}, date),
+      models: daily.models || {},
     };
   }
 
   return {
     deb: detail.deb?.prediction ?? null,
-    models: withMeteoblue(detail.multi_model || {}, date),
+    models: detail.multi_model || {},
   };
 }
 
@@ -712,10 +663,6 @@ export function computeFrontTrendSignal(
           ? isEnglish(locale)
             ? "Temperature declines with pressure rebound and/or northerly shift. Next 6-48h leans cold-front suppression."
             : "温度下滑、气压回升或风向转北，未来 6-48 小时更像冷锋或冷平流压制。"
-          : detail.name !== "ankara" && Boolean(detail.source_forecasts?.meteoblue)
-            ? isEnglish(locale)
-              ? "Structured trend layer mainly uses weather.gov, Open-Meteo and Meteoblue for 6-48h warm/cold flow judgement."
-              : "结构化来源以 weather.gov、Open-Meteo、Meteoblue 为主，用于判断未来 6-48 小时冷暖平流趋势。"
             : isEnglish(locale)
               ? "Structured trend layer mainly uses weather.gov and Open-Meteo for 6-48h warm/cold flow judgement."
               : "结构化来源以 weather.gov 和 Open-Meteo 为主，用于判断未来 6-48 小时冷暖平流趋势。",

frontend/lib/i18n.ts

@@ -42,7 +42,7 @@ const MESSAGES: Record<Locale, Record<string, string>> = {
     "guide.title": "📎 PolyWeather 系统技术说明",
     "guide.closeAria": "关闭技术说明",
     "guide.footer":
-      "数据源以 Aviation Weather / METAR、Turkish MGM、Open-Meteo、weather.gov 为主，部分城市补充 Meteoblue。",
+      "数据源以 Aviation Weather / METAR、Turkish MGM、Open-Meteo、weather.gov 为主。",
 
     "history.title": "📊 历史准确率对账 - {city}",
     "history.closeAria": "关闭历史对账",
@@ -143,7 +143,7 @@ const MESSAGES: Record<Locale, Record<string, string>> = {
     "guide.title": "📎 PolyWeather Technical Overview",
     "guide.closeAria": "Close technical overview",
     "guide.footer":
-      "Primary data sources are Aviation Weather / METAR, Turkish MGM, Open-Meteo, and weather.gov, with Meteoblue added for selected cities.",
+      "Primary data sources are Aviation Weather / METAR, Turkish MGM, Open-Meteo, and weather.gov.",
 
     "history.title": "📊 Historical Reconciliation - {city}",
     "history.closeAria": "Close history reconciliation",

frontend/lib/types.ts

@@ -186,7 +186,6 @@ export interface ModelComparison {
   JMA?: number;
   MGM?: number;
   NWS?: number;
-  Meteoblue?: number;
 }
 
 export interface DEBAnalysis {