feat(admin): demo account rebuild button + user asset registry (photo keys cascade-deleted with user)

app/src/lib/api.ts

@@ -211,6 +211,8 @@ export const adminCreateInvite = (code: string, remark: string, baseUrl?: string
   adminCall<{ code: string }>('/admin/invites/create', { code, remark }, baseUrl);
 export const adminUpdateInvite = (id: number, patch: { remark?: string; valid?: boolean }, baseUrl?: string) =>
   adminCall<{ id: number }>('/admin/invites/update', { id, ...patch }, baseUrl);
+export const adminDemoRebuild = (baseUrl?: string) =>
+  adminCall<{ ok: true; seeded: { seeded: boolean; footprints: number; semesters: number } }>('/admin/demo-rebuild', {}, baseUrl);
 export const adminDeleteUser = (userId: number | string, baseUrl?: string) =>
   adminCall<{ ok: true; username: string; remote_deleted: number }>('/admin/users/delete', { user_id: userId }, baseUrl);
 export const adminDeleteInvite = (id: number, baseUrl?: string) =>

app/src/pages/admin/AdminPage.tsx

@@ -2,7 +2,7 @@ import { useMemo, useState } from 'react';
 import { useQuery, useQueryClient, useMutation } from '@tanstack/react-query';
 import { AlertTriangle, Check, Copy, Pencil, Plus, RefreshCw, TicketCheck, Trash2, Users2, X } from 'lucide-react';
 import {
-  adminCreateInvite, adminDeleteInvite, adminDeleteUser, adminGenerateInvites, adminListInvites,
+  adminCreateInvite, adminDeleteInvite, adminDeleteUser, adminDemoRebuild, adminGenerateInvites, adminListInvites,
   adminListUsers, adminUpdateInvite, getServerUrl, getToken,
   type InviteRow,
 } from '@/lib/api';
@@ -37,10 +37,22 @@ export function AdminPage() {
   const [filter, setFilter] = useState<Filter>('all');
   const [delUser, setDelUser] = useState<{ id: number | string; username: string } | null>(null);
   const [delConfirm, setDelConfirm] = useState('');
+  const [rebuildOpen, setRebuildOpen] = useState(false);
+
 
 
   const invalidate = () => { void qc.invalidateQueries({ queryKey: ['admin-invites'] }); };
   const onErr = (e: unknown) => setActionError((e as Error).message || '操作失败');
+  const rebuildMut = useMutation({
+    mutationFn: () => adminDemoRebuild(base),
+    onSuccess: (d) => {
+      setRebuildOpen(false); setActionError('');
+      toast('success', '演示账号已重建：' + (d.seeded?.footprints ?? 0) + ' 条记录 + ' + (d.seeded?.semesters ?? 0) + ' 学期');
+      void qc.invalidateQueries({ queryKey: ['admin-users'] });
+    },
+    onError: onErr,
+  });
+
   const delUserMut = useMutation({
     mutationFn: (id: number | string) => adminDeleteUser(id, base),
     onSuccess: (d) => {
@@ -96,9 +108,14 @@ export function AdminPage() {
     <div className="mx-auto max-w-[1080px] px-3 py-4 sm:px-6 sm:py-5">
       <div className="mb-4 flex items-center justify-between">
         <h2 className="text-[15px] font-semibold text-ink-1">管理</h2>
-        <Button variant="secondary" onClick={() => { void qc.invalidateQueries(); }}>
-          <RefreshCw size={13} /> 刷新
-        </Button>
+        <div className="flex gap-2">
+          <Button variant="secondary" onClick={() => setRebuildOpen(true)}>
+            <Users2 size={13} /> 重建演示账号
+          </Button>
+          <Button variant="secondary" onClick={() => { void qc.invalidateQueries(); }}>
+            <RefreshCw size={13} /> 刷新
+          </Button>
+        </div>
       </div>
 
       {actionError && (
@@ -309,6 +326,23 @@ export function AdminPage() {
         </div>
       </Dialog>
 
+      <Dialog
+        open={rebuildOpen}
+        onClose={() => setRebuildOpen(false)}
+        width={440}
+        title="重建演示账号"
+        footer={<>
+          <Button variant="ghost" onClick={() => setRebuildOpen(false)}>取消</Button>
+          <Button variant="primary" disabled={rebuildMut.isPending} onClick={() => rebuildMut.mutate()}>
+            重建并重新播种
+          </Button>
+        </>}>
+        <div className="text-[12.5px] leading-relaxed text-ink-2">
+          将<b>删除现有 demo 账号及其全部数据</b>，然后重新创建并播种全套虚拟演示数据
+          （个人信息档案、16 条足迹、4 学期成绩、简历内容）。
+          <div className="mt-2 text-ink-3">demo / demo1234 · 仅影响演示账号，其他用户不受影响。</div>
+        </div>
+      </Dialog>
     </div>
   );
 }