Rename Backlog list to Open for Swimlanes

app/assets/javascripts/boards/boards_util.js

 import { sortBy } from 'lodash';
+import { __ } from '~/locale';
 import { ListType } from './constants';
 import { getIdFromGraphQLId } from '~/graphql_shared/utils';
 
@@ -8,14 +9,15 @@ export function getMilestone() {
 
 export function updateListPosition(listObj) {
   const { listType } = listObj;
-  let { position } = listObj;
+  let { position, title } = listObj;
   if (listType === ListType.closed) {
     position = Infinity;
   } else if (listType === ListType.backlog) {
     position = -Infinity;
+    title = __('Open');
   }
 
-  return { ...listObj, position };
+  return { ...listObj, title, position };
 }
 
 export function formatBoardLists(lists) {

app/assets/javascripts/boards/stores/actions.js

@@ -12,6 +12,7 @@ import {
   fullBoardId,
   formatListsPageInfo,
   formatIssue,
+  updateListPosition,
 } from '../boards_util';
 import createFlash from '~/flash';
 import { __ } from '~/locale';
@@ -131,7 +132,7 @@ export default {
   },
 
   addList: ({ commit }, list) => {
-    commit(types.RECEIVE_ADD_LIST_SUCCESS, list);
+    commit(types.RECEIVE_ADD_LIST_SUCCESS, updateListPosition(list));
   },
 
   fetchLabels: ({ state, commit }, searchTerm) => {

ee/changelogs/unreleased/296976-the-open-list-in-boards-with-swimlanes-applied-is-mislabeled-as.yml

+---
+title: Rename Backlog list to Open for Swimlanes
+merge_request: 51539
+author:
+type: fixed

ee/spec/features/boards/swimlanes/epics_swimlanes_spec.rb

@@ -8,7 +8,7 @@ RSpec.describe 'epics swimlanes', :js do
   let_it_be(:project) { create(:project, :public, group: group) }
 
   let_it_be(:board) { create(:board, project: project) }
-  let_it_be(:label) { create(:label, project: project, name: 'Label 1') }
+  let_it_be(:label) { create(:label, project: project, name: 'Label1') }
   let_it_be(:list) { create(:list, board: board, label: label, position: 0) }
 
   let_it_be(:issue1) { create(:issue, project: project, labels: [label]) }
@@ -40,6 +40,18 @@ RSpec.describe 'epics swimlanes', :js do
         expect(page.find('span[data-testid="issues-lane-issue-count"]')).to have_content('1')
       end
     end
+
+    it 'displays default lists and a label list' do
+      lists = %w[Open Label1 Closed]
+
+      wait_for_requests
+
+      expect(page).to have_selector('.board-header', count: 3)
+
+      page.all('.board-header').each_with_index do |list, i|
+        expect(list.find('.board-title')).to have_content(lists[i])
+      end
+    end
   end
 
   before do