Add can_update in boards_helper.rb

app/helpers/boards_helper.rb

@@ -14,6 +14,7 @@ module BoardsHelper
       root_path: root_path,
       full_path: full_path,
       bulk_update_path: @bulk_issues_path,
+      can_update: (!!can?(current_user, :admin_issue, board)).to_s,
       time_tracking_limit_to_hours: Gitlab::CurrentSettings.time_tracking_limit_to_hours.to_s,
       recent_boards_endpoint: recent_boards_path,
       parent: current_board_parent.model_name.param_key,

spec/helpers/boards_helper_spec.rb

@@ -43,6 +43,7 @@ RSpec.describe BoardsHelper do
 
       allow(helper).to receive(:current_user) { user }
       allow(helper).to receive(:can?).with(user, :create_non_backlog_issues, board).and_return(true)
+      allow(helper).to receive(:can?).with(user, :admin_issue, board).and_return(true)
     end
 
     it 'returns a board_lists_path as lists_endpoint' do
@@ -52,6 +53,10 @@ RSpec.describe BoardsHelper do
     it 'returns board type as parent' do
       expect(helper.board_data[:parent]).to eq('project')
     end
+
+    it 'returns can_update for user permissions on the board' do
+      expect(helper.board_data[:can_update]).to eq('true')
+    end
   end
 
   describe '#current_board_json' do