feat(landing): rebuild as Next.js app with live product mocks

Replaces the static HTML page with a Next.js 15 + Tailwind v4 + Motion
app. The hero renders the dashboard itself - live tiles, ticking clock,
wandering metrics, pulsing status dots - instead of screenshots. Adds a
playable four-renderer switcher (bento/cards/index/console) with layout
animations, live monitor/domain/system mocks, and a cycling alert feed.

Vercel project dash is now git-connected with root dir landing/; pushes
deploy automatically. Canonical alias: dash-homelab.vercel.app.

Authored By: TDvorak <[email protected]>

Generated with [Devin](https://devin.ai)

Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>

landing/components/CopyButton.tsx

@@ -0,0 +1,35 @@
+"use client";
+
+import { useState } from "react";
+
+export function CopyButton({ text, label }: { text: string; label: string }) {
+  const [copied, setCopied] = useState(false);
+
+  return (
+    <button
+      type="button"
+      aria-label={label}
+      onClick={async () => {
+        try {
+          await navigator.clipboard.writeText(text);
+          setCopied(true);
+          setTimeout(() => setCopied(false), 1400);
+        } catch {
+          /* clipboard unavailable - select manually */
+        }
+      }}
+      className="flex h-7 w-7 shrink-0 items-center justify-center rounded-md text-faint transition-colors hover:bg-surface-hover hover:text-text"
+    >
+      {copied ? (
+        <svg width="13" height="13" viewBox="0 0 24 24" fill="none" stroke="var(--color-up)" strokeWidth="2.5" aria-hidden="true">
+          <path d="M20 6 9 17l-5-5" />
+        </svg>
+      ) : (
+        <svg width="13" height="13" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" aria-hidden="true">
+          <rect x="9" y="9" width="13" height="13" rx="2" />
+          <path d="M5 15H4a2 2 0 0 1-2-2V4a2 2 0 0 1 2-2h9a2 2 0 0 1 2 2v1" />
+        </svg>
+      )}
+    </button>
+  );
+}