new: server tag

lib/core/extension/order.dart

@@ -19,4 +19,16 @@ extension StringOrderX on StringOrder {
     if (index == -1) return;
     this[index] = newId;
   }
+
+  int index(String id) {
+    return indexOf(id);
+  }
+
+  void moveById(String oid, String nid, StoreProperty property) {
+    final index = indexOf(oid);
+    if (index == -1) return;
+    final newIndex = indexOf(nid);
+    if (newIndex == -1) return;
+    move(index, newIndex, property);
+  }
 }

lib/core/utils/ui.dart

@@ -141,7 +141,7 @@ void showSnippetDialog(
             context.pop();
             AppRoute(const SnippetEditPage(), 'edit snippet').go(context);
           },
-          child: Text(s.addOne),
+          child: Text(s.add),
         )
       ],
     );