fix: ensure datetime attribute contains timezone offset

src/components/generic/ATime.vue

@@ -5,6 +5,7 @@
 </template>
 
 <script lang="ts" setup>
+import { formatISO } from 'date-fns'
 import { computed } from 'vue'
 import { useI18n } from '@/i18n'
 import { ensureDate } from '@/util'
@@ -14,9 +15,7 @@ const props = defineProps<{
 }>()
 const { locale } = useI18n()
 const datetime = computed(() => ensureDate(props.time))
-const isoRepresentation = computed(() =>
-  typeof props.time === 'string' ? props.time : props.time.toISOString(),
-)
+const isoRepresentation = computed(() => formatISO(datetime.value))
 const title = computed(() =>
   datetime.value.toLocaleString(locale.value, { dateStyle: 'full', timeStyle: 'medium' }),
 )