Fix inability to locally suspend remotely-suspended accounts in moderation interface (#31899)

app/models/account.rb

@@ -259,6 +259,10 @@ class Account < ApplicationRecord
     suspended_at.present? && !instance_actor?
   end
 
+  def suspended_locally?
+    suspended? && suspension_origin_local?
+  end
+
   def suspended_permanently?
     suspended? && deletion_request.nil?
   end

app/models/admin/account_action.rb

@@ -74,7 +74,7 @@ class Admin::AccountAction
     end
 
     def disabled_types_for_account(account)
-      if account.suspended?
+      if account.suspended_locally?
         %w(silence suspend)
       elsif account.silenced?
         %w(silence)