Add support for setting Content Warning for CW-less outgoing toots

app/models/form/admin_settings.rb

@@ -41,6 +41,7 @@ class Form::AdminSettings
     show_domain_blocks
     show_domain_blocks_rationale
     noindex
+    outgoing_spoilers
   ).freeze
 
   BOOLEAN_KEYS = %i(

app/serializers/activitypub/note_serializer.rb

@@ -35,7 +35,11 @@ class ActivityPub::NoteSerializer < ActivityPub::Serializer
   end
 
   def summary
-    object.spoiler_text.presence
+    object.spoiler_text.presence || Setting.outgoing_spoilers.presence
+  end
+
+  def sensitive
+    object.sensitive || Setting.outgoing_spoilers.present?
   end
 
   def content

app/views/admin/settings/edit.html.haml

@@ -108,6 +108,9 @@
     .fields-row__column.fields-row__column-6.fields-group
       = f.input :show_domain_blocks_rationale, wrapper: :with_label, collection: %i(disabled users all), label: t('admin.settings.domain_blocks_rationale.title'), label_method: lambda { |value| t("admin.settings.domain_blocks.#{value}") }, include_blank: false, collection_wrapper_tag: 'ul', item_wrapper_tag: 'li'
 
+  .fields-group
+    = f.input :outgoing_spoilers, wrapper: :with_label, label: t('admin.settings.outgoing_spoilers.title'), hint: t('admin.settings.outgoing_spoilers.desc_html')
+
   .fields-group
     = f.input :site_extended_description, wrapper: :with_block_label, as: :text, label: t('admin.settings.site_description_extended.title'), hint: t('admin.settings.site_description_extended.desc_html'), input_html: { rows: 8 } unless whitelist_mode?
     = f.input :closed_registrations_message, as: :text, wrapper: :with_block_label, label: t('admin.settings.registrations.closed_message.title'), hint: t('admin.settings.registrations.closed_message.desc_html'), input_html: { rows: 8 }