chore: show dates

src/private/categories/AddOrEditCategoryForm.jsx

@@ -25,6 +25,23 @@ function extractTenantId(token) {
   return '';
 }
 
+function formatDateSafe(value) {
+  if (!value) return '—';
+  // Accept Date instance, ISO string, or numeric timestamp
+  const d = value instanceof Date ? value : new Date(value);
+  if (Number.isNaN(d.getTime())) return '—';
+  // Treat placeholder/default dates as empty
+  const year = d.getUTCFullYear();
+  if (year <= 1971) return '—';
+  return new Intl.DateTimeFormat(undefined, {
+    year: 'numeric',
+    month: 'short',
+    day: '2-digit',
+    hour: '2-digit',
+    minute: '2-digit'
+  }).format(d);
+}
+
 export default function AddOrEditCategoryForm({ onAdd, initialData, onCancel, materials: materialsProp = [], initialMaterialNames = [] }) {
   const { user } = useAuth();
   const token = user?.thalosToken || localStorage.getItem('thalosToken');
@@ -349,9 +366,9 @@ const tagLabelById = useMemo(() => {
 
       {form._Id || form.id ? (
         <Box sx={{ display: 'grid', gridTemplateColumns: { xs: '1fr', md: '1fr 1fr' }, gap: 2, mt: 2 }}>
-          <TextField label="Created At" value={form.createdAt ? new Date(form.createdAt).toLocaleString() : '—'} InputProps={{ readOnly: true }} fullWidth />
+          <TextField label="Created At" value={formatDateSafe(form.createdAt)} InputProps={{ readOnly: true }} fullWidth />
           <TextField label="Created By" value={form.createdBy ?? '—'} InputProps={{ readOnly: true }} fullWidth />
-          <TextField label="Updated At" value={form.updatedAt ? new Date(form.updatedAt).toLocaleString() : '—'} InputProps={{ readOnly: true }} fullWidth />
+          <TextField label="Updated At" value={formatDateSafe(form.updatedAt)} InputProps={{ readOnly: true }} fullWidth />
           <TextField label="Updated By" value={form.updatedBy ?? '—'} InputProps={{ readOnly: true }} fullWidth />
         </Box>
       ) : null}

src/private/categories/Categories.jsx

@@ -84,6 +84,10 @@ export default function Categories() {
       materialNames: typeof r.material === 'string'
         ? r.material.split(',').map(s => s.trim()).filter(Boolean)
         : Array.isArray(r.material) ? r.material : [],
+      createdAt: r.createdAt ?? null,
+      createdBy: r.createdBy ?? null,
+      updatedAt: r.updatedAt ?? null,
+      updatedBy: r.updatedBy ?? null,
     });
     setOpen(true);
   };