Add admin notifications for new Mastodon versions (#26582)

app/views/admin/software_updates/index.html.haml

@@ -0,0 +1,29 @@
+- content_for :page_title do
+  = t('admin.software_updates.title')
+
+.simple_form
+  %p.lead
+    = t('admin.software_updates.description')
+    = link_to t('admin.software_updates.documentation_link'), 'https://docs.joinmastodon.org/admin/upgrading/#automated_checks', target: '_new'
+
+%hr.spacer
+
+- unless @software_updates.empty?
+  .table-wrapper
+    %table.table
+      %thead
+        %tr
+          %th= t('admin.software_updates.version')
+          %th= t('admin.software_updates.type')
+          %th
+          %th
+      %tbody
+        - @software_updates.each do |update|
+          %tr
+            %td= update.version
+            %td= t("admin.software_updates.types.#{update.type}")
+            - if update.urgent?
+              %td.critical= t("admin.software_updates.critical_update")
+            - else
+              %td
+            %td= table_link_to 'link', t('admin.software_updates.release_notes'), update.release_notes

app/views/admin_mailer/new_critical_software_updates.text.erb

@@ -0,0 +1,5 @@
+<%= raw t('application_mailer.salutation', name: display_name(@me)) %>
+
+<%= raw t('admin_mailer.new_critical_software_updates.body') %>
+
+<%= raw t('application_mailer.view')%> <%= admin_software_updates_url %>

app/views/admin_mailer/new_software_updates.text.erb

@@ -0,0 +1,5 @@
+<%= raw t('application_mailer.salutation', name: display_name(@me)) %>
+
+<%= raw t('admin_mailer.new_software_updates.body') %>
+
+<%= raw t('application_mailer.view')%> <%= admin_software_updates_url %>

app/views/settings/preferences/notifications/show.html.haml

@@ -22,7 +22,7 @@
     .fields-group
       = ff.input :always_send_emails, wrapper: :with_label, label: I18n.t('simple_form.labels.defaults.setting_always_send_emails'), hint: I18n.t('simple_form.hints.defaults.setting_always_send_emails')
 
-    - if current_user.can?(:manage_reports, :manage_appeals, :manage_users, :manage_taxonomies)
+    - if current_user.can?(:manage_reports, :manage_appeals, :manage_users, :manage_taxonomies) || (SoftwareUpdate.check_enabled? && current_user.can?(:view_devops))
       %h4= t 'notifications.administration_emails'
 
       .fields-group
@@ -31,6 +31,10 @@
         = ff.input :'notification_emails.pending_account', wrapper: :with_label, label: I18n.t('simple_form.labels.notification_emails.pending_account') if current_user.can?(:manage_users)
         = ff.input :'notification_emails.trends', wrapper: :with_label, label: I18n.t('simple_form.labels.notification_emails.trending_tag') if current_user.can?(:manage_taxonomies)
 
+      - if SoftwareUpdate.check_enabled? && current_user.can?(:view_devops)
+        .fields-group
+          = ff.input :'notification_emails.software_updates', wrapper: :with_label, label: I18n.t('simple_form.labels.notification_emails.software_updates.label'), collection: %w(none critical patch all), label_method: ->(setting) { I18n.t("simple_form.labels.notification_emails.software_updates.#{setting}") }, include_blank: false, hint: false
+
   %h4= t 'notifications.other_settings'
 
   .fields-group