Add an enterprise banner on top of automatic subject configuration

We are making sure that users can revert back to manual subjects
at any time and even keep using the feature if it's still enabled
after their enterprise token expired. They will merely not be able
to set new types to automatic and have to live with an enterprise
banner being shown to them whenever they change the subject config.

app/components/work_packages/types/subject_configuration_component.html.erb

@@ -27,6 +27,10 @@ See COPYRIGHT and LICENSE files for more details.
 
 ++#%>
 
+<%=
+  render(EnterpriseEdition::BannerComponent.new(:automatic_subject_generation))
+%>
+
 <%=
   primer_form_with(**form_options) do |f|
     render(WorkPackages::Types::SubjectConfigurationForm.new(f))

app/forms/work_packages/types/subject_configuration_form.rb

@@ -36,13 +36,15 @@ class SubjectConfigurationForm < ApplicationForm
           group.radio_button(
             value: "manual",
             checked: !has_pattern?,
+            disabled: !EnterpriseToken.active? && !has_pattern?,
             label: I18n.t("types.edit.subject_configuration.manually_editable_subjects.label"),
             caption: I18n.t("types.edit.subject_configuration.manually_editable_subjects.caption"),
             data: { action: "admin--subject-configuration#hidePatternInput" }
           )
           group.radio_button(
             value: "auto",
             checked: has_pattern?,
+            disabled: !EnterpriseToken.active? && !has_pattern?,
             label: I18n.t("types.edit.subject_configuration.automatically_generated_subjects.label"),
             caption: I18n.t("types.edit.subject_configuration.automatically_generated_subjects.caption"),
             data: { action: "admin--subject-configuration#showPatternInput" }

config/locales/en.yml

@@ -1903,6 +1903,8 @@ en:
     upsale:
       title: "Enterprise add-on"
       link_title: "More information"
+      automatic_subject_generation:
+        description: "Create automatically generated subjects using referenced attributes and text."
       form_configuration:
         description: "Customize the form configuration with these additional add-ons:"
         add_groups: "Add new attribute groups"

lib/open_project/static/links.rb

@@ -251,6 +251,9 @@ def static_links
               href: "https://www.openproject.org/docs/user-guide/time-and-costs/progress-tracking/"
             },
             enterprise_docs: {
+              automatic_subject_generation: {
+                href: "https://www.openproject.org/docs/todo/do-not-merge"
+              },
               form_configuration: {
                 href: "https://www.openproject.org/docs/system-admin-guide/manage-work-packages/work-package-types/#work-package-form-configuration-enterprise-add-on"
               },