Fix: 334334 move todo_button.vue to sidebar

app/assets/javascripts/design_management/components/design_todo_button.vue

 <script>
 import todoMarkDoneMutation from '~/graphql_shared/mutations/todo_mark_done.mutation.graphql';
-import TodoButton from '~/vue_shared/components/todo_button.vue';
+import TodoButton from '~/vue_shared/components/sidebar/todo_button.vue';
 import createDesignTodoMutation from '../graphql/mutations/create_design_todo.mutation.graphql';
 import getDesignQuery from '../graphql/queries/get_design.query.graphql';
 import allVersionsMixin from '../mixins/all_versions';

app/assets/javascripts/sidebar/components/todo_toggle/sidebar_todo_widget.vue

@@ -4,7 +4,7 @@ import { produce } from 'immer';
 import createFlash from '~/flash';
 import { __, sprintf } from '~/locale';
 import { todoQueries, TodoMutationTypes, todoMutations } from '~/sidebar/constants';
-import TodoButton from '~/vue_shared/components/todo_button.vue';
+import TodoButton from '~/vue_shared/components/sidebar/todo_button.vue';
 
 export default {
   components: {

doc/development/fe_guide/storybook.md

@@ -38,13 +38,14 @@ To add a story:
     ```txt
     vue_shared/
     ├─ components/
-    │  ├─ todo_button.vue
-    │  ├─ todo_button.stories.js
+    │  ├─ sidebar
+    │  │  ├─ todo_button.vue
+    │  │  ├─ todo_button.stories.js
     ```
 
 1. Write the story as per the [official Storybook instructions](https://storybook.js.org/docs/vue/writing-stories/introduction)
    
    Notes:
    - Specify the `title` field of the story as the component's file path from the `javascripts/` directory,
-     e.g. if the component is located at `app/assets/javascripts/vue_shared/components/todo_button.vue`, specify the `title` as
+     e.g. if the component is located at `app/assets/javascripts/vue_shared/components/sidebar/todo_button.vue`, specify the `title` as
      `vue_shared/components/To-do Button`. This will ensure the Storybook navigation maps closely to our internal directory structure.

spec/frontend/design_management/components/design_todo_button_spec.js

@@ -2,7 +2,7 @@ import { shallowMount, mount } from '@vue/test-utils';
 import DesignTodoButton from '~/design_management/components/design_todo_button.vue';
 import createDesignTodoMutation from '~/design_management/graphql/mutations/create_design_todo.mutation.graphql';
 import todoMarkDoneMutation from '~/graphql_shared/mutations/todo_mark_done.mutation.graphql';
-import TodoButton from '~/vue_shared/components/todo_button.vue';
+import TodoButton from '~/vue_shared/components/sidebar/todo_button.vue';
 import mockDesign from '../mock_data/design';
 
 const mockDesignWithPendingTodos = {

spec/frontend/sidebar/components/todo_toggle/sidebar_todo_widget_spec.js

@@ -6,7 +6,7 @@ import waitForPromises from 'helpers/wait_for_promises';
 import createFlash from '~/flash';
 import SidebarTodoWidget from '~/sidebar/components/todo_toggle/sidebar_todo_widget.vue';
 import epicTodoQuery from '~/sidebar/queries/epic_todo.query.graphql';
-import TodoButton from '~/vue_shared/components/todo_button.vue';
+import TodoButton from '~/vue_shared/components/sidebar/todo_button.vue';
 import { todosResponse, noTodosResponse } from '../../mock_data';
 
 jest.mock('~/flash');

spec/frontend/vue_shared/components/todo_button_spec.js → spec/frontend/vue_shared/components/sidebar/todo_button_spec.js

 import { GlButton } from '@gitlab/ui';
 import { shallowMount, mount } from '@vue/test-utils';
-import TodoButton from '~/vue_shared/components/todo_button.vue';
+import TodoButton from '~/vue_shared/components/sidebar/todo_button.vue';
 
 describe('Todo Button', () => {
   let wrapper;