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/views/admin/disputes/appeals/_appeal.html.haml

@@ -0,0 +1,21 @@
+= link_to disputes_strike_path(appeal.strike), class: ['log-entry', appeal.approved? && 'log-entry--inactive'] do
+  .log-entry__header
+    .log-entry__avatar
+      = image_tag appeal.account.avatar.url(:original), alt: '', width: 40, height: 40, class: 'avatar'
+    .log-entry__content
+      .log-entry__title
+        = t(appeal.strike.action, scope: 'admin.strikes.actions', name: content_tag(:span, appeal.strike.account.username, class: 'username'), target: content_tag(:span, appeal.account.acct, class: 'target')).html_safe
+      .log-entry__timestamp
+        %time.formatted{ datetime: appeal.strike.created_at.iso8601 }
+          = l(appeal.strike.created_at)
+
+        - if appeal.strike.report_id.present?
+          ·
+          = t('admin.reports.title', id: appeal.strike.report_id)
+        ·
+        - if appeal.approved?
+          %span.positive-hint= t('admin.strikes.appeal_approved')
+        - elsif appeal.rejected?
+          %span.negative-hint= t('admin.strikes.appeal_rejected')
+        - else
+          %span.warning-hint= t('admin.strikes.appeal_pending')