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/models/account_warning.rb

@@ -12,6 +12,7 @@
 #  updated_at        :datetime         not null
 #  report_id         :bigint(8)
 #  status_ids        :string           is an Array
+#  overruled_at      :datetime
 #
 
 class AccountWarning < ApplicationRecord
@@ -28,12 +29,17 @@ class AccountWarning < ApplicationRecord
   belongs_to :target_account, class_name: 'Account', inverse_of: :strikes
   belongs_to :report, optional: true
 
-  has_one :appeal, dependent: :destroy
+  has_one :appeal, dependent: :destroy, inverse_of: :strike
 
   scope :latest, -> { order(id: :desc) }
   scope :custom, -> { where.not(text: '') }
+  scope :active, -> { where(overruled_at: nil).or(where('account_warnings.overruled_at >= ?', 30.days.ago)) }
 
   def statuses
     Status.with_discarded.where(id: status_ids || [])
   end
+
+  def overruled?
+    overruled_at.present?
+  end
 end