fix: navigate to time action (#20928)

* fix: navigate to time action

* change-date -> DateSelectionModal; use luxon; use handle* for callback fn name

* refactor change-date dialogs

* Review comments

* chore: clean up

---------

Co-authored-by: Jason Rasmussen <jason@rasm.me>

web/src/lib/modals/AssetChangeDateModal.svelte

@@ -0,0 +1,84 @@
+<script lang="ts">
+  import Combobox from '$lib/components/shared-components/combobox.svelte';
+  import DateInput from '$lib/elements/DateInput.svelte';
+  import type { TimelineAsset } from '$lib/managers/timeline-manager/types';
+  import { getPreferredTimeZone, getTimezones, toIsoDate } from '$lib/modals/timezone-utils';
+  import { handleError } from '$lib/utils/handle-error';
+  import { updateAsset } from '@immich/sdk';
+  import { Button, HStack, Modal, ModalBody, ModalFooter, VStack } from '@immich/ui';
+  import { mdiCalendarEdit } from '@mdi/js';
+  import { DateTime } from 'luxon';
+  import { t } from 'svelte-i18n';
+
+  interface Props {
+    initialDate?: DateTime;
+    initialTimeZone?: string;
+    timezoneInput?: boolean;
+    asset: TimelineAsset;
+    onClose: (success: boolean) => void;
+  }
+
+  let { initialDate = DateTime.now(), initialTimeZone, timezoneInput = true, asset, onClose }: Props = $props();
+
+  let selectedDate = $state(initialDate.toFormat("yyyy-MM-dd'T'HH:mm:ss.SSS"));
+  const timezones = $derived(getTimezones(selectedDate));
+
+  // svelte-ignore state_referenced_locally
+  let lastSelectedTimezone = $state(getPreferredTimeZone(initialDate, initialTimeZone, timezones));
+  // the offsets (and validity) for time zones may change if the date is changed, which is why we recompute the list
+  let selectedOption = $derived(getPreferredTimeZone(initialDate, initialTimeZone, timezones, lastSelectedTimezone));
+
+  const handleClose = async () => {
+    if (!date.isValid || !selectedOption) {
+      onClose(false);
+      return;
+    }
+
+    // Get the local date/time components from the selected string using neutral timezone
+    const isoDate = toIsoDate(selectedDate, selectedOption);
+    try {
+      await updateAsset({ id: asset.id, updateAssetDto: { dateTimeOriginal: isoDate } });
+      onClose(true);
+    } catch (error) {
+      handleError(error, $t('errors.unable_to_change_date'));
+      onClose(false);
+    }
+  };
+
+  // when changing the time zone, assume the configured date/time is meant for that time zone (instead of updating it)
+  const date = $derived(DateTime.fromISO(selectedDate, { zone: selectedOption?.value, setZone: true }));
+</script>
+
+<Modal title={$t('edit_date_and_time')} icon={mdiCalendarEdit} onClose={() => onClose(false)} size="small">
+  <ModalBody>
+    <VStack fullWidth>
+      <HStack fullWidth>
+        <label class="immich-form-label" for="datetime">{$t('date_and_time')}</label>
+      </HStack>
+      <HStack fullWidth>
+        <DateInput
+          class="immich-form-input text-gray-700 w-full"
+          id="datetime"
+          type="datetime-local"
+          bind:value={selectedDate}
+        />
+      </HStack>
+      {#if timezoneInput}
+        <div class="w-full">
+          <Combobox
+            bind:selectedOption
+            label={$t('timezone')}
+            options={timezones}
+            placeholder={$t('search_timezone')}
+          />
+        </div>
+      {/if}
+    </VStack>
+  </ModalBody>
+  <ModalFooter>
+    <HStack fullWidth>
+      <Button shape="round" color="secondary" fullWidth onclick={() => onClose(false)}>{$t('cancel')}</Button>
+      <Button shape="round" type="submit" fullWidth onclick={handleClose}>{$t('confirm')}</Button>
+    </HStack>
+  </ModalFooter>
+</Modal>