Website: Next.js app for accounts, linking, who's online, device sign-in and the console

apps/web: Next.js 16 (App Router), Tailwind 4 and shadcn/ui, light and dark from the system. Pages render on the
server and call the API with Eden Treaty (typed by @t5de/api), forwarding the visitor's cookie; forms use server
actions; sign-up, sign-in and sign-out use Better Auth's React client. /api is rewritten to the API so its cookies
are first-party. Who's online follows the API's event stream (Next's gzip is off: it held the stream back).
Standalone output with a Dockerfile; deploys to Vercel as is.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

apps/web/app/error.tsx

@@ -0,0 +1,17 @@
+"use client";
+import Link from "next/link";
+import { NarrowCard } from "@/components/narrow-card";
+import { Button, buttonVariants } from "@/components/ui/button";
+
+export default function ErrorPage({ reset }: { error: Error & { digest?: string }; reset: () => void }) {
+  return (
+    <NarrowCard title="Sorry" description="Something went wrong on our side. Try again in a moment.">
+      <div className="flex gap-2">
+        <Button onClick={reset}>Try again</Button>
+        <Link href="/" className={buttonVariants({ variant: "outline" })}>
+          Home
+        </Link>
+      </div>
+    </NarrowCard>
+  );
+}