fix: keep birthdays and show Shamsi dates

Imported customers keep their birthday, and assistant text plus remaining calendars use the Jalali date.

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

apps/web/src/views/TicketsView.vue

@@ -4,7 +4,7 @@ import TableColumnsMenu from '@/components/TableColumnsMenu.vue';
 import { RouterLink, useRoute, useRouter } from 'vue-router';
 import axios from 'axios';
 import { api } from '@/lib/api';
-import { toFaDigits } from '@/lib/jalali';
+import { formatJalaliDateTime, toFaDigits } from '@/lib/jalali';
 import {
   UiButton,
   UiPageHeader,
@@ -57,14 +57,9 @@ const statusFilterLabel = computed(() =>
 
 function formatSla(iso: string | null) {
   if (!iso) return '';
-  try {
-    return new Intl.DateTimeFormat('fa-IR', {
-      dateStyle: 'short',
-      timeStyle: 'short',
-    }).format(new Date(iso));
-  } catch {
-    return iso;
-  }
+  const d = new Date(iso);
+  if (Number.isNaN(d.getTime())) return iso;
+  return formatJalaliDateTime(d);
 }
 
 async function load() {