feat: establish NekoNest Cloud control and relay

app/dashboard/error.tsx

@@ -0,0 +1,15 @@
+"use client";
+
+import { RouteErrorState } from "../components/RouteStates";
+
+export default function DashboardError({ reset }: { reset: () => void }) {
+  return (
+    <RouteErrorState
+      area="控制台"
+      title="控制台暂时没有加载出来"
+      description="账户或主机状态这次未能安全读取，因此页面没有猜测或沿用旧结果。"
+      reset={reset}
+      dashboard
+    />
+  );
+}