poc: gtfs simple viewer

package.json

@@ -3,6 +3,7 @@
   "version": "1.0.2",
   "private": true,
   "dependencies": {
+    "@duckdb/duckdb-wasm": "^1.33.1-dev45.0",
     "@emotion/cache": "11.14.0",
     "@emotion/react": "11.13.0",
     "@emotion/styled": "11.13.0",

src/app/[locale]/gtfs-viewer/components/GtfsViewerClient.tsx

@@ -0,0 +1,14 @@
+'use client';
+
+// Client Component wrapper that lazy-loads GtfsViewerClient with ssr:false.
+// This keeps DuckDB-WASM out of the server bundle and prevents the Turbopack
+// WASM chunking crash at build time. ssr:false is allowed here because this
+// is a Client Component.
+import dynamic from 'next/dynamic';
+
+const GtfsViewerClient = dynamic(
+  () => import('../../../components/gtfs-viewer/GtfsViewerClient'),
+  { ssr: false },
+);
+
+export default GtfsViewerClient;

src/app/[locale]/gtfs-viewer/page.tsx

@@ -0,0 +1,18 @@
+import { type ReactElement } from 'react';
+import { type Metadata } from 'next';
+import { routing } from '../../../i18n/routing';
+import { type Locale } from '../../../i18n/routing';
+import GtfsViewerClient from './components/GtfsViewerClient';
+
+export const metadata: Metadata = {
+  title: 'GTFS Viewer POC | MobilityDatabase',
+  description: 'Explore GTFS dataset tables with efficient pagination and search via DuckDB-WASM.',
+};
+
+export function generateStaticParams(): Array<{ locale: Locale }> {
+  return routing.locales.map((locale) => ({ locale }));
+}
+
+export default function GtfsViewerPage(): ReactElement {
+  return <GtfsViewerClient />;
+}