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)/proxy-routes/detail/components/section-shell.tsx

@@ -0,0 +1,37 @@
+'use client';
+
+import type {ReactNode} from 'react';
+
+import {Button} from '@/components/ui/button';
+import {Card, CardContent, CardDescription, CardHeader, CardTitle} from '@/components/ui/card';
+
+interface SectionShellProps {
+  title: string;
+  description: string;
+  formId: string;
+  saving?: boolean;
+  children: ReactNode;
+}
+
+export function SectionShell({
+  title,
+  description,
+  formId,
+  saving = false,
+  children,
+}: SectionShellProps) {
+  return (
+    <Card>
+      <CardHeader className="flex flex-row items-start justify-between gap-4 space-y-0">
+        <div className="space-y-1">
+          <CardTitle className="text-sm font-semibold">{title}</CardTitle>
+          <CardDescription>{description}</CardDescription>
+        </div>
+        <Button type="submit" form={formId} size="sm" className="h-8 shrink-0 text-xs" disabled={saving}>
+          {saving ? '保存中...' : '保存'}
+        </Button>
+      </CardHeader>
+      <CardContent>{children}</CardContent>
+    </Card>
+  );
+}