fix: add delete button inside brand edit modal

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

client/src/pages/Brands.jsx

@@ -297,7 +297,16 @@ export default function Brands() {
             </div>
           )}
 
-          <div className="flex items-center justify-end gap-3 pt-4 border-t border-border">
+          <div className="flex items-center justify-between pt-4 border-t border-border">
+            {editingBrand && isSuperadminOrManager ? (
+              <button
+                onClick={() => { setShowModal(false); setBrandToDelete(editingBrand); setShowDeleteModal(true) }}
+                className="px-3 py-2 text-sm font-medium text-red-600 hover:bg-red-50 rounded-lg transition-colors"
+              >
+                {t('common.delete')}
+              </button>
+            ) : <div />}
+            <div className="flex items-center gap-3">
               <button
                 onClick={() => { setShowModal(false); setEditingBrand(null) }}
                 className="px-4 py-2 text-sm font-medium text-text-secondary hover:bg-surface-tertiary rounded-lg"
@@ -313,6 +322,7 @@ export default function Brands() {
               </button>
             </div>
           </div>
+        </div>
       </Modal>
 
       {/* Delete Confirmation */}