feat: save conflict resolution

client/graph/editor/create.gql

@@ -9,6 +9,7 @@ mutation ($content: String!, $description: String!, $editor: String!, $isPrivate
       }
       page {
         id
+        updatedAt
       }
     }
   }

client/graph/editor/update.gql

@@ -7,6 +7,9 @@ mutation ($id: Int!, $content: String, $description: String, $editor: String, $i
         slug
         message
       }
+      page {
+        updatedAt
+      }
     }
   }
 }