Fix link issues with labels

* On the project labels page, the label itself should not be clickable.
* On the group labels page, the links for Issues and Merge
  Requests should be shown.

app/views/shared/_label_row.html.haml

 - subject = local_assigns[:subject]
 - force_priority = local_assigns.fetch(:force_priority, false)
-- show_label_epics_link = defined?(@group) && @group&.feature_available?(:epics)
-- show_label_issues_link = defined?(@project) && show_label_issuables_link?(label, :issues, project: @project)
-- show_label_merge_requests_link = defined?(@project) && show_label_issuables_link?(label, :merge_requests, project: @project)
+- subject_or_group_defined = defined?(@project) || defined?(@group)
+- show_label_issues_link = subject_or_group_defined && show_label_issuables_link?(label, :issues, project: @project)
+- show_label_merge_requests_link = subject_or_group_defined && show_label_issuables_link?(label, :merge_requests, project: @project)
 
 .label-name
-  - if defined?(@project)
-    = link_to_label(label, subject: @project, tooltip: false)
-  - else
   = render_label(label, tooltip: false)
 .label-description
   .append-right-default.prepend-left-default
@@ -15,18 +12,15 @@
       .description-text
         = markdown_field(label, :description)
     %ul.label-links
-      - if show_label_epics_link
-        %li.label-link-item.inline
-          = link_to 'Epics', group_epics_path(@group, label_name:[label.name])
-          ·
       - if show_label_issues_link
         %li.label-link-item.inline
           = link_to_label(label, subject: subject) { 'Issues' }
-          ·
       - if show_label_merge_requests_link
+        ·
         %li.label-link-item.inline
           = link_to_label(label, subject: subject, type: :merge_request) { _('Merge requests') }
-          ·
       - if force_priority
+        ·
         %li.label-link-item.priority-badge.js-priority-badge.inline.prepend-left-10
           .label-badge.label-badge-blue= _('Prioritized label')
+      = render_if_exists 'shared/label_row_epics_link', label: label

changelogs/unreleased/gitlab-issue-54894.yml

+---
+title: Fix some label links not appearing on group labels page and label title being
+  a link on project labels page
+merge_request: 24060
+author: Tanya Pazitny
+type: fixed

ee/app/views/shared/_label_row_epics_link.html.haml

+- show_label_epics_link = defined?(@group) && @group&.feature_available?(:epics)
+
+- if show_label_epics_link
+  ·
+  %li.label-link-item.inline
+    = link_to 'Epics', group_epics_path(@group, label_name:[label.name])

spec/views/shared/_label_row.html.haml.rb

+# frozen_string_literal: true
+require 'spec_helper'
+
+describe 'shared/_label_row.html.haml' do
+  label_types = {
+    'project label': :label,
+    'group label': :group_label
+  }
+
+  label_types.each do |label_type, label_factory|
+    let!(:label) { create(label_factory) }
+
+    context "for a #{label_type}" do
+      it 'has a non-linked label title' do
+        render 'shared/label_row', label: label
+
+        expect(rendered).not_to have_css('a', text: label.title)
+      end
+
+      it "has Issues link for #{label_type}" do
+        render 'shared/label_row', label: label
+
+        expect(rendered).to have_css('a', text: 'Issues')
+      end
+
+      it "has Merge request link for #{label_type}" do
+        render 'shared/label_row', label: label
+
+        expect(rendered).to have_css('a', text: 'Merge requests')
+      end
+    end
+  end
+end