feat(account): self-service deletion with a 7-day cooling-off period

Request signs out everywhere and freezes paid routes (423 + DB triggers);
signing in within 7 days shows the pending gate with 撤销注销. A periodic
idempotent worker purges personal content afterwards and keeps finance
rows against a tombstoned identity. Read-only admin list.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01N4f2nya58RoRu4yEmJgRGE

frontend/src/components/admin/account-deletions-resource.tsx

@@ -0,0 +1,44 @@
+"use client";
+
+import { Descriptions, type TableColumnsType } from "antd";
+
+import { formatAdminDate, ResourceTable } from "@/components/admin/resource-table";
+
+type DeletionRecord = {
+  id: string;
+  userId: string;
+  status: string;
+  requestedAt: string;
+  scheduledFor: string;
+  cancelledAt: string | null;
+  completedAt: string | null;
+  attemptCount: number;
+  errorCode: string | null;
+};
+
+const STATUS_LABELS: Record<string, string> = { pending: "冷静期中", cancelled: "已撤销", completed: "已删除" };
+
+const columns: TableColumnsType<DeletionRecord> = [
+  { title: "状态", dataIndex: "status", sorter: true, render: (value: string) => STATUS_LABELS[value] ?? value },
+  { title: "用户 ID", dataIndex: "userId" },
+  { title: "申请时间", dataIndex: "requestedAt", sorter: true, render: formatAdminDate },
+  { title: "计划删除", dataIndex: "scheduledFor", sorter: true, render: formatAdminDate },
+  { title: "撤销时间", dataIndex: "cancelledAt", render: (value: string | null) => (value ? formatAdminDate(value) : "—") },
+  { title: "完成时间", dataIndex: "completedAt", render: (value: string | null) => (value ? formatAdminDate(value) : "—") },
+  { title: "失败次数", dataIndex: "attemptCount" },
+  { title: "最近错误", dataIndex: "errorCode", render: (value: string | null) => value ?? "—" },
+];
+
+export default function AccountDeletionsPage() {
+  return <ResourceTable<DeletionRecord>
+    resource="account-deletions"
+    title="注销申请（只读）"
+    columns={columns}
+    statusOptions={[
+      { label: "冷静期中", value: "pending" },
+      { label: "已撤销", value: "cancelled" },
+      { label: "已删除", value: "completed" },
+    ]}
+    extra={<Descriptions size="small" items={[{ key: "policy", label: "说明", children: "7 天冷静期后自动删除个人内容；订单与点数流水保留但不再关联身份。本表不存邮箱与昵称。" }]} />}
+  />;
+}

frontend/src/components/admin/admin-app.tsx

@@ -104,6 +104,7 @@ export function AdminApp({ children }: { children: ReactNode }) {
               { name: "administrators", list: "/admin/administrators", meta: { label: "管理员", icon: <SafetyCertificateOutlined /> } },
               { name: "roles", list: "/admin/roles", meta: { label: "角色权限", icon: <TeamOutlined /> } },
               { name: "customers", list: "/admin/customers", meta: { label: "用户资料", icon: <UserOutlined /> } },
+              { name: "account-deletions", list: "/admin/account-deletions", meta: { label: "注销申请", icon: <UserOutlined /> } },
               { name: "products", list: "/admin/products", meta: { label: "商品权益", icon: <ShoppingOutlined /> } },
               { name: "subscriptions", list: "/admin/subscriptions", meta: { label: "订阅", icon: <CreditCardOutlined /> } },
               { name: "orders", list: "/admin/orders", meta: { label: "订单", icon: <DatabaseOutlined /> } },