Proxy API through Next.js route handlers — eliminates CORS

app/health/route.ts

@@ -0,0 +1,16 @@
+import { NextResponse } from "next/server";
+
+const BACKEND = process.env.HERMES_BACKEND_URL || "http://127.0.0.1:8643";
+
+export async function GET() {
+  try {
+    const res = await fetch(`${BACKEND}/health`);
+    const data = await res.text();
+    return new NextResponse(data, {
+      status: res.status,
+      headers: { "content-type": "application/json" },
+    });
+  } catch {
+    return NextResponse.json({ status: "error" }, { status: 502 });
+  }
+}