Fix filter todos by design

doc/user/todos.md

@@ -137,7 +137,7 @@ There are four kinds of filters you can use on your To-Do List.
 | Project | Filter by project |
 | Group   | Filter by group |
 | Author  | Filter by the author that triggered the To Do |
-| Type    | Filter by issue, merge request, or epic **(ULTIMATE)** |
+| Type    | Filter by issue, merge request, design, or epic **(ULTIMATE)** |
 | Action  | Filter by the action that triggered the To Do |
 
 You can also filter by more than one of these at the same time. The possible Actions are

ee/app/finders/ee/todos_finder.rb

@@ -4,7 +4,7 @@ module EE
   module TodosFinder
     extend ActiveSupport::Concern
 
-    EE_TODO_TYPES = (::TodosFinder::TODO_TYPES + %w[Epic]).freeze
+    EE_TODO_TYPES = (::TodosFinder::TODO_TYPES + %w[Epic DesignManagement::Design]).freeze
 
     class_methods do
       extend ::Gitlab::Utils::Override

ee/changelogs/unreleased/33187-fix-filter-todos-by-design.yml

+---
+title: Fix filter todos by design.
+merge_request: 29972
+author: Gilang Gumilar
+type: fixed

spec/finders/todos_finder_spec.rb

@@ -260,7 +260,7 @@ describe TodosFinder do
     it 'returns the expected types' do
       expected_result =
         if Gitlab.ee?
-          %w[Epic Issue MergeRequest]
+          %w[DesignManagement::Design Epic Issue MergeRequest]
         else
           %w[Issue MergeRequest]
         end