feat: improve date formatting helper to return local timezone date string

Author: JoachimLK

app/components/InterviewScheduleSidebar.vue

@@ -51,9 +51,12 @@ const selectedTemplateName = computed(() => {
 })
 
 // Set a sensible default title
-// Helper to extract YYYY-MM-DD from a Date object
+// Helper to extract YYYY-MM-DD from a Date object in local timezone
 function toDateString(d: Date): string {
-  return d.toISOString().slice(0, 10)
+  const year = d.getFullYear()
+  const month = String(d.getMonth() + 1).padStart(2, '0')
+  const day = String(d.getDate()).padStart(2, '0')
+  return `${year}-${month}-${day}`
 }
 
 onMounted(() => {