added watermark settings tab on the branding page and added more package details to the billing page, added a new guest notifications page

resources/js/admin/mobile/guestMessages.ts

@@ -0,0 +1,8 @@
+export function formatGuestMessageDate(value: string | null, locale: string): string {
+  if (!value) return '—';
+  const date = new Date(value);
+  if (Number.isNaN(date.getTime())) {
+    return value;
+  }
+  return date.toLocaleString(locale, { dateStyle: 'medium', timeStyle: 'short' });
+}