Import december-2020-12-18 from private repo (scrubbed 2026-05-27)

Targets Rec Room 2020.12.18 client.

Re-import after adding:
- DorkNet.ClientMod/dorknet-clientmod.json.template — config schema
  the launcher's manifest-driven patcher renders into UserData/.
- tools/build-patcher-zip.ps1 — produces the dorknet-clientpatch-{key}.zip
  Release asset the launcher fetches.
- .github/workflows/release.yml — auto-publishes both Release assets
  on v1-december-* tag push.

Scrubbed via maintainer-side scrub-for-public.ps1: same drop rules as
the prior import, plus build-patcher-zip.ps1 added to the tools/
allow-list so it survives the scrub.

DorkNet.Server/admin-ui/src/components/Confirm.tsx

@@ -0,0 +1,37 @@
+import { useState } from 'react';
+import { Modal } from './Modal';
+
+interface Props {
+  title: string;
+  body: React.ReactNode;
+  confirmLabel?: string;
+  destructive?: boolean;
+  open: boolean;
+  onClose: () => void;
+  onConfirm: () => Promise<void> | void;
+}
+
+export function Confirm({ title, body, confirmLabel = 'Confirm', destructive, open, onClose, onConfirm }: Props) {
+  const [busy, setBusy] = useState(false);
+  const run = async () => {
+    setBusy(true);
+    try { await onConfirm(); onClose(); }
+    finally { setBusy(false); }
+  };
+  return (
+    <Modal
+      title={title}
+      open={open}
+      onClose={onClose}
+      size="sm"
+      footer={<>
+        <button onClick={onClose} className="btn-ghost text-xs" disabled={busy}>Cancel</button>
+        <button onClick={run} className={(destructive ? 'btn-danger' : 'btn-primary') + ' text-xs'} disabled={busy}>
+          {busy ? 'Working…' : confirmLabel}
+        </button>
+      </>}
+    >
+      <div className="text-sm text-ink-200">{body}</div>
+    </Modal>
+  );
+}