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/controllers/disputes/appeals_controller.rb

@@ -0,0 +1,25 @@
+# frozen_string_literal: true
+
+class Disputes::AppealsController < Disputes::BaseController
+  before_action :set_strike
+
+  def create
+    authorize @strike, :appeal?
+
+    @appeal = AppealService.new.call(@strike, appeal_params[:text])
+
+    redirect_to disputes_strike_path(@strike), notice: I18n.t('disputes.strikes.appealed_msg')
+  rescue ActiveRecord::RecordInvalid
+    render template: 'disputes/strikes/show'
+  end
+
+  private
+
+  def set_strike
+    @strike = current_account.strikes.find(params[:strike_id])
+  end
+
+  def appeal_params
+    params.require(:appeal).permit(:text)
+  end
+end