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/components/node-detail-primitives.tsx

@@ -0,0 +1,79 @@
+'use client';
+
+import type {ReactNode} from 'react';
+import type {LucideIcon} from 'lucide-react';
+
+import {Card, CardContent, CardDescription, CardHeader, CardTitle} from '@/components/ui/card';
+import {cn} from '@/lib/utils';
+
+export function NodeInfoRow({
+  label,
+  children,
+  className,
+}: {
+  label: string;
+  children: ReactNode;
+  className?: string;
+}) {
+  return (
+    <div className={cn('flex items-start justify-between gap-4 py-2.5 text-sm', className)}>
+      <span className="shrink-0 text-muted-foreground">{label}</span>
+      <div className="min-w-0 text-right font-medium">{children}</div>
+    </div>
+  );
+}
+
+export function NodeKpiCard({
+  label,
+  value,
+  icon: Icon,
+}: {
+  label: string;
+  value: ReactNode;
+  icon?: LucideIcon;
+}) {
+  return (
+    <div className="rounded-xl border bg-card/60 px-4 py-3.5 backdrop-blur-sm">
+      <div className="flex items-center gap-2 text-xs text-muted-foreground">
+        {Icon ? <Icon className="size-3.5 opacity-70" /> : null}
+        <span>{label}</span>
+      </div>
+      <p className="mt-2 text-sm font-semibold tracking-tight break-all">{value}</p>
+    </div>
+  );
+}
+
+export function NodeSectionCard({
+  title,
+  description,
+  action,
+  children,
+  className,
+}: {
+  title: string;
+  description?: string;
+  action?: React.ReactNode;
+  children: ReactNode;
+  className?: string;
+}) {
+  return (
+    <Card className={cn('border shadow-none', className)}>
+      <CardHeader className={cn('pb-3', action ? 'flex-row items-start justify-between space-y-0' : '')}>
+        <div className="space-y-1">
+          <CardTitle className="text-base font-semibold">{title}</CardTitle>
+          {description ? <CardDescription>{description}</CardDescription> : null}
+        </div>
+        {action}
+      </CardHeader>
+      <CardContent>{children}</CardContent>
+    </Card>
+  );
+}
+
+export function NodeErrorBanner({ message }: { message: string }) {
+  return (
+    <div className="rounded-xl border border-destructive/25 bg-destructive/5 px-4 py-3 text-sm text-destructive">
+      {message}
+    </div>
+  );
+}