perbaikan created_at timesheet

src/routes/backoffice/timesheets/+page.svelte

@@ -160,6 +160,7 @@
         total_work_hour: 0,
         remarks: "",
         approval: null, // Default null
+        created_at: new Date().toISOString(),
     };
     // Fetch initial data on mount
     onMount(async () => {
@@ -624,6 +625,21 @@
 
             error = updateError;
         } else {
+            form = {
+                ...form,
+                entered_by: form.entered_by,
+                work_description: form.work_description,
+                type_of_work: form.type_of_work,
+                category_of_work: form.category_of_work,
+                villa_id: form.villa_id,
+                datetime_in: form.datetime_in,
+                datetime_out: form.datetime_out,
+                total_work_hour: form.total_work_hour,
+                remarks: form.remarks,
+                approval: form.approval || null, // Allow null for new entries
+                created_at: new Date().toISOString(),
+            };
+
             const { error: insertError } = await supabase
                 .from("vb_timesheet")
                 .insert([form]);