Initial role user app

src/lib/format.ts

@@ -0,0 +1,14 @@
+export function formatDateTime(value?: string | null) {
+  if (!value) return "暂未设置";
+
+  return new Intl.DateTimeFormat("zh-CN", {
+    month: "2-digit",
+    day: "2-digit",
+    hour: "2-digit",
+    minute: "2-digit"
+  }).format(new Date(value));
+}
+
+export function roleNames(roles: { name: string }[]) {
+  return roles.map((role) => role.name).join("、") || "未分配角色";
+}