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/helpers/admin/trends/statuses_helper.rb

@@ -0,0 +1,20 @@
+# frozen_string_literal: true
+
+module Admin::Trends::StatusesHelper
+  def one_line_preview(status)
+    text = begin
+      if status.local?
+        status.text.split("\n").first
+      else
+        Nokogiri::HTML(status.text).css('html > body > *').first&.text
+      end
+    end
+
+    return '' if text.blank?
+
+    html = Formatter.instance.send(:encode, text)
+    html = Formatter.instance.send(:encode_custom_emojis, html, status.emojis, prefers_autoplay?)
+
+    html.html_safe # rubocop:disable Rails/OutputSafety
+  end
+end