Initial commit: tkmind admin frontend (React + Vite).

Co-authored-by: Cursor <cursoragent@cursor.com>

src/admin/utils/format.ts

@@ -0,0 +1,7 @@
+export function formatYuan(cents: number) {
+  return (cents / 100).toFixed(2);
+}
+
+export function formatTime(ts: number) {
+  return new Date(ts).toLocaleString('zh-CN');
+}