Add appeals (#17364)

* Add appeals

* Add ability to reject appeals and ability to browse pending appeals in admin UI

* Add strikes to account page in settings

* Various fixes and improvements

- Add separate notification setting for appeals, separate from reports
- Fix style of links in report/strike header
- Change approving an appeal to not restore statuses (due to federation complexities)
- Change style of successfully appealed strikes on account settings page
- Change account settings page to only show unappealed or recently appealed strikes

* Change appealed_at to overruled_at

* Fix missing method error

app/mailers/admin_mailer.rb

@@ -15,6 +15,16 @@ class AdminMailer < ApplicationMailer
     end
   end
 
+  def new_appeal(recipient, appeal)
+    @appeal   = appeal
+    @me       = recipient
+    @instance = Rails.configuration.x.local_domain
+
+    locale_for_account(@me) do
+      mail to: @me.user_email, subject: I18n.t('admin_mailer.new_appeal.subject', instance: @instance, username: @appeal.account.username)
+    end
+  end
+
   def new_pending_account(recipient, user)
     @account  = user.account
     @me       = recipient

app/mailers/user_mailer.rb

@@ -173,6 +173,26 @@ class UserMailer < Devise::Mailer
     end
   end
 
+  def appeal_approved(user, appeal)
+    @resource = user
+    @instance = Rails.configuration.x.local_domain
+    @appeal   = appeal
+
+    I18n.with_locale(@resource.locale || I18n.default_locale) do
+      mail to: @resource.email, subject: I18n.t('user_mailer.appeal_approved.subject', date: l(@appeal.created_at))
+    end
+  end
+
+  def appeal_rejected(user, appeal)
+    @resource = user
+    @instance = Rails.configuration.x.local_domain
+    @appeal   = appeal
+
+    I18n.with_locale(@resource.locale || I18n.default_locale) do
+      mail to: @resource.email, subject: I18n.t('user_mailer.appeal_rejected.subject', date: l(@appeal.created_at))
+    end
+  end
+
   def sign_in_token(user, remote_ip, user_agent, timestamp)
     @resource   = user
     @instance   = Rails.configuration.x.local_domain