Refactor appeal partial to avoid brakeman XSS warning (#25880)

app/helpers/admin/disputes_helper.rb

@@ -0,0 +1,19 @@
+# frozen_string_literal: true
+
+module Admin
+  module DisputesHelper
+    def strike_action_label(appeal)
+      t(key_for_action(appeal),
+        scope: 'admin.strikes.actions',
+        name: content_tag(:span, appeal.strike.account.username, class: 'username'),
+        target: content_tag(:span, appeal.account.username, class: 'target'))
+        .html_safe
+    end
+
+    private
+
+    def key_for_action(appeal)
+      AccountWarning.actions.slice(appeal.strike.action).keys.first
+    end
+  end
+end