Revert to storing application info, and display it to the author via API

app/serializers/rest/status_serializer.rb

@@ -14,7 +14,7 @@ class REST::StatusSerializer < ActiveModel::Serializer
   attribute :local_only if :local?
 
   belongs_to :reblog, serializer: REST::StatusSerializer
-  belongs_to :application, if: :user_shows_application?
+  belongs_to :application, if: :show_application?
   belongs_to :account, serializer: REST::AccountSerializer
 
   has_many :media_attachments, serializer: REST::MediaAttachmentSerializer
@@ -40,8 +40,8 @@ class REST::StatusSerializer < ActiveModel::Serializer
     !current_user.nil?
   end
 
-  def user_shows_application?
-    object.account.user_shows_application?
+  def show_application?
+    object.account.user_shows_application? || (current_user? && current_user.account_id == object.account_id)
   end
 
   def visibility

app/services/post_status_service.rb

@@ -22,7 +22,6 @@ class PostStatusService < BaseService
     @options     = options
     @text        = @options[:text] || ''
     @in_reply_to = @options[:thread]
-    @options.delete(:application) unless @account.user&.setting_show_application
 
     return idempotency_duplicate if idempotency_given? && idempotency_duplicate?