Move weather summaries out of the dashboard utility bulk

Weather labels, METAR translation, risk badges, and hero meta chips were still embedded in dashboard-utils even though panel, modal, and detail views use them as focused presentation helpers. This moves them into weather-summary-utils while keeping dashboard-utils re-export compatibility.

Constraint: Preserve existing weather/METAR/risk/hero meta wording.

Rejected: Move airport narrative in the same pass | it has broader AI narrative coupling and should be separated independently.

Confidence: high

Scope-risk: narrow

Reversibility: clean

Tested: TypeScript diagnostics for weather-summary-utils, dashboard-utils, PanelSections, DetailPanel, and FutureForecastModal

Tested: npm run build

Not-tested: Visual snapshot of every weather icon/label combination.

frontend/components/dashboard/DetailPanel.tsx

@@ -13,11 +13,9 @@ import { CityDetail } from "@/lib/dashboard-types";
 import { trackAppEvent } from "@/lib/app-analytics";
 import { getTodayPolymarketUrl } from "@/lib/polymarket-market-links";
 import { getTemperatureChartData } from "@/lib/chart-utils";
-import {
-  getCityProfileStats,
-  getRiskBadgeLabel,
-} from "@/lib/dashboard-utils";
+import { getCityProfileStats } from "@/lib/dashboard-utils";
 import { normalizeObservationSourceLabel } from "@/lib/source-labels";
+import { getRiskBadgeLabel } from "@/lib/weather-summary-utils";
 
 function DetailMiniTemperatureChart({ detail }: { detail: CityDetail }) {
   const { locale, t } = useI18n();