refactored timetracking to only use client-supplied times

frontend/src/Components/TimeRecordEditor.svelte

@@ -1,6 +1,8 @@
 <script>
+    import { display }    from '../time.svelte.js';
     import { t }          from '../translations.svelte.js';
     import MarkdownEditor from './MarkdownEditor.svelte';
+    import TimeStampInput from './TimeStampInput.svelte';
 
     let { record = null, onSet = time => {} } = $props();
 
@@ -20,11 +22,11 @@
     </label>
     <label>
         {t('start')}
-        <input type="datetime-local" bind:value={record.start_time} />
+        <TimeStampInput bind:timestamp={record.start_time} />
     </label>
     <label>
         {t('end')}
-        <input type="datetime-local" bind:value={record.end_time} />
+        <TimeStampInput bind:timestamp={record.end_time} />
     </label>
     <label>
         {t('description')}