refactor(repo): consolidate openflare-server to root and move subprojects to internal/apps

- Merge all files inside openflare-server to the repository root directory.
- Relocate agent, relay, and flared subprojects from internal/ to internal/apps/.
- Combine docker-compose files and update build context paths to root.
- Update GitHub workflows and Dockerfiles to refer to new directories and package names.
- Rewrite Go package imports across all files.
- Resolve database renew test race condition and clean up docs.

frontend/app/(main)/nodes/detail/page-client.tsx

@@ -0,0 +1,96 @@
+'use client';
+
+import Link from 'next/link';
+import {useMemo} from 'react';
+import {useSearchParams} from 'next/navigation';
+import {useQuery} from '@tanstack/react-query';
+import {ArrowLeft, Server} from 'lucide-react';
+
+import {Button} from '@/components/ui/button';
+import {EmptyStateWithBorder} from '@/components/layout/empty';
+import {ErrorInline} from '@/components/layout/error';
+import {LoadingStateWithBorder} from '@/components/layout/loading';
+import {NodeService} from '@/lib/services/openflare';
+
+import {EdgeNodeDetail} from '../components/edge-node-detail';
+import {RelayNodeDetail} from '../components/relay-node-detail';
+import {TunnelNodeDetail} from '../components/tunnel-node-detail';
+import {getErrorMessage} from '../components/node-utils';
+
+const nodesQueryKey = ['openflare', 'nodes'];
+
+export function NodeDetailPageClient() {
+  const searchParams = useSearchParams();
+  const nodeId = searchParams.get('id')?.trim() ?? '';
+
+  const nodesQuery = useQuery({
+    queryKey: nodesQueryKey,
+    queryFn: () => NodeService.listNodes(),
+    refetchInterval: 5000,
+  });
+
+  const node = useMemo(() => {
+    if (!nodeId) return null;
+    return (nodesQuery.data ?? []).find((item) => String(item.id) === nodeId) ?? null;
+  }, [nodeId, nodesQuery.data]);
+
+  if (!nodeId) {
+    return (
+      <div className="py-6 px-1">
+        <EmptyStateWithBorder
+          icon={Server}
+          description="缺少节点 ID，请从节点列表进入详情页。"
+        />
+      </div>
+    );
+  }
+
+  if (nodesQuery.isLoading) {
+    return (
+      <div className="py-6 px-1">
+        <LoadingStateWithBorder icon={Server} description="加载节点详情中..." />
+      </div>
+    );
+  }
+
+  if (nodesQuery.isError) {
+    return (
+      <div className="py-6 px-1">
+        <div className="p-8 border border-dashed rounded-lg">
+          <ErrorInline
+            message={getErrorMessage(nodesQuery.error)}
+            onRetry={() => void nodesQuery.refetch()}
+            className="justify-center"
+          />
+        </div>
+      </div>
+    );
+  }
+
+  if (!node) {
+    return (
+      <div className="py-6 px-1 space-y-4">
+        <Button variant="ghost" size="sm" className="h-8 px-2" asChild>
+          <Link href="/nodes">
+            <ArrowLeft className="size-4 mr-1" />
+            返回节点列表
+          </Link>
+        </Button>
+        <EmptyStateWithBorder
+          icon={Server}
+          description="节点不存在，可能已被删除或 ID 无效。"
+        />
+      </div>
+    );
+  }
+
+  if (node.node_type === 'tunnel_relay') {
+    return <RelayNodeDetail node={node} />;
+  }
+
+  if (node.node_type === 'tunnel_client') {
+    return <TunnelNodeDetail node={node} />;
+  }
+
+  return <EdgeNodeDetail node={node} />;
+}

frontend/app/(main)/nodes/detail/page.tsx

@@ -0,0 +1,23 @@
+import {Suspense} from 'react';
+
+import {Skeleton} from '@/components/ui/skeleton';
+
+import {NodeDetailPageClient} from './page-client';
+
+function NodeDetailPageFallback() {
+  return (
+    <div className="py-6 px-1 space-y-6">
+      <Skeleton className="h-8 w-48" />
+      <Skeleton className="h-10 w-full max-w-xl" />
+      <Skeleton className="h-64 w-full" />
+    </div>
+  );
+}
+
+export default function NodeDetailPage() {
+  return (
+    <Suspense fallback={<NodeDetailPageFallback />}>
+      <NodeDetailPageClient />
+    </Suspense>
+  );
+}