Add support for reversible suspensions through ActivityPub (#14989)

app/controllers/following_accounts_controller.rb

@@ -52,6 +52,14 @@ class FollowingAccountsController < ApplicationController
     account_following_index_url(@account, page: page) unless page.nil?
   end
 
+  def next_page_url
+    page_url(follows.next_page) if follows.respond_to?(:next_page)
+  end
+
+  def prev_page_url
+    page_url(follows.prev_page) if follows.respond_to?(:prev_page)
+  end
+
   def collection_presenter
     if page_requested?
       ActivityPub::CollectionPresenter.new(
@@ -60,8 +68,8 @@ class FollowingAccountsController < ApplicationController
         size: @account.following_count,
         items: follows.map { |f| ActivityPub::TagManager.instance.uri_for(f.target_account) },
         part_of: account_following_index_url(@account),
-        next: page_url(follows.next_page),
-        prev: page_url(follows.prev_page)
+        next: next_page_url,
+        prev: prev_page_url
       )
     else
       ActivityPub::CollectionPresenter.new(