feat: v0.1.0 — scaffold + MapLibre map with EU airports

app/api/mlworker/[file]/route.ts

@@ -0,0 +1,20 @@
+import { promises as fs } from 'node:fs';
+import path from 'node:path';
+
+// Serves maplibre-gl dist files (worker + its relative imports) straight from
+// node_modules so they always match the installed version. MapLibre cannot derive
+// working URLs for these when bundled by Turbopack/webpack, and the worker script
+// uses a relative import ("./maplibre-gl-shared.mjs") that must resolve against
+// this same prefix.
+export async function GET(_req: Request, ctx: { params: Promise<{ file: string }> }) {
+  const { file } = await ctx.params;
+  if (!/^[\w.-]+\.mjs$/.test(file)) return new Response('not found', { status: 404 });
+  try {
+    const body = await fs.readFile(
+      path.join(process.cwd(), 'node_modules', 'maplibre-gl', 'dist', file),
+    );
+    return new Response(body, { headers: { 'content-type': 'text/javascript' } });
+  } catch {
+    return new Response('not found', { status: 404 });
+  }
+}