feat: implement AI city forecasting and market scan hooks with backend API integration for the scan terminal dashboard

frontend/components/dashboard/ScanTerminalDashboard.tsx

@@ -34,7 +34,7 @@ import type {
 } from "@/lib/dashboard-types";
 import {
   buildBrowserBackendHeaders,
-  resolveBackendApiUrl,
+  fetchBackendApi,
 } from "@/lib/backend-api";
 import { getLocalizedCityName } from "@/lib/dashboard-home-copy";
 import { AiPinnedForecastView } from "@/components/dashboard/scan-terminal/AiPinnedForecastView";
@@ -249,7 +249,7 @@ function ScanTerminalScreen() {
     })
       .then((headers) => {
         if (cancelled) return null;
-        return fetch(resolveBackendApiUrl(`/api/scan/terminal?${params.toString()}`), {
+        return fetchBackendApi(`/api/scan/terminal?${params.toString()}`, {
           cache: "no-store",
           headers,
           signal: controller.signal,

frontend/components/dashboard/scan-terminal/use-ai-city-card-data.ts

@@ -8,7 +8,7 @@ import type {
 import { useDashboardStore } from "@/hooks/useDashboardStore";
 import {
   buildBrowserBackendHeaders,
-  resolveBackendApiUrl,
+  fetchBackendApi,
 } from "@/lib/backend-api";
 import type { CityDetail, MarketScan } from "@/lib/dashboard-types";
 import { normalizeCityKey } from "./decision-utils";
@@ -192,7 +192,7 @@ export function useAiCityForecast({
       })
       .then((headers) => {
         if (cancelled) return null;
-        return fetch(resolveBackendApiUrl("/api/scan/terminal/ai-city"), {
+        return fetchBackendApi("/api/scan/terminal/ai-city", {
           method: "POST",
           headers,
           cache: "no-store",