Add public market brief content assets

frontend/app/sources/[slug]/page.tsx

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+import type { Metadata } from "next";
+import { notFound } from "next/navigation";
+import { SourceDetailPageView } from "@/components/public-content/PublicContentPages";
+import {
+  SOURCE_PAGES,
+  absolutePublicUrl,
+  getSourcePage,
+  sourcePath,
+} from "@/content/public-content";
+
+type SourcePageParams = {
+  slug: string;
+};
+
+export function generateStaticParams() {
+  return SOURCE_PAGES.map((source) => ({ slug: source.slug }));
+}
+
+export async function generateMetadata({
+  params,
+}: {
+  params: Promise<SourcePageParams>;
+}): Promise<Metadata> {
+  const { slug } = await params;
+  const source = getSourcePage(slug);
+
+  if (!source) {
+    return {
+      title: "Source not found",
+    };
+  }
+
+  return {
+    title: source.title,
+    description: source.description,
+    alternates: {
+      canonical: sourcePath(source),
+    },
+    openGraph: {
+      type: "article",
+      title: source.title,
+      description: source.description,
+      url: sourcePath(source),
+      modifiedTime: source.updatedAt,
+    },
+  };
+}
+
+export default async function SourceDetailPage({
+  params,
+}: {
+  params: Promise<SourcePageParams>;
+}) {
+  const { slug } = await params;
+  const source = getSourcePage(slug);
+
+  if (!source) {
+    notFound();
+  }
+
+  const pathname = sourcePath(source);
+  const jsonLd = {
+    "@context": "https://schema.org",
+    "@type": "Dataset",
+    name: source.title,
+    description: source.description,
+    url: absolutePublicUrl(pathname),
+    dateModified: source.updatedAt,
+    creator: {
+      "@type": "Organization",
+      name: source.operator,
+    },
+    includedInDataCatalog: {
+      "@type": "DataCatalog",
+      name: "PolyWeather source notes",
+      url: absolutePublicUrl("/sources"),
+    },
+  };
+
+  return (
+    <>
+      <script
+        type="application/ld+json"
+        dangerouslySetInnerHTML={{ __html: JSON.stringify(jsonLd) }}
+      />
+      <SourceDetailPageView source={source} />
+    </>
+  );
+}

frontend/app/sources/page.tsx

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+import type { Metadata } from "next";
+import { SourcesIndexPageView } from "@/components/public-content/PublicContentPages";
+
+export const metadata: Metadata = {
+  title: "Weather Sources",
+  description:
+    "PolyWeather public source notes for MGM, METAR, HKO, NOAA, ECMWF, and settlement-source weather analysis.",
+  alternates: {
+    canonical: "/sources",
+  },
+  openGraph: {
+    title: "Weather Sources | PolyWeather",
+    description:
+      "Public source notes for MGM, METAR, HKO, NOAA, ECMWF, and settlement-source weather analysis.",
+    url: "/sources",
+  },
+};
+
+export default function SourcesPage() {
+  return <SourcesIndexPageView />;
+}