chore: merge admin repo history into monorepo at admin/

git-subtree-dir: admin
git-subtree-mainline: 35f5084005
git-subtree-split: 9f1eccd2f7

admin/src/lib/utils.ts

@@ -0,0 +1,16 @@
+import { clsx, type ClassValue } from "clsx";
+
+export function cn(...inputs: ClassValue[]) {
+  return clsx(inputs);
+}
+
+export function calcAge(birthDate?: string): number | null {
+  if (!birthDate) return null;
+  const b = new Date(birthDate);
+  if (Number.isNaN(b.getTime())) return null;
+  const now = new Date();
+  let age = now.getFullYear() - b.getFullYear();
+  const m = now.getMonth() - b.getMonth();
+  if (m < 0 || (m === 0 && now.getDate() < b.getDate())) age--;
+  return age;
+}