Resolve "Improve format support message in issue design"

changelogs/unreleased/210339-improve-format-support-message-in-issue-design.yml

+---
+title: Resolve Improve format support message in issue design
+merge_request: 27409
+author:
+type: fixed

ee/app/assets/javascripts/design_management/utils/cache_update.js

@@ -4,7 +4,6 @@ import {
   ADD_IMAGE_DIFF_NOTE_ERROR,
   UPDATE_IMAGE_DIFF_NOTE_ERROR,
   ADD_DISCUSSION_COMMENT_ERROR,
-  UPLOAD_DESIGN_ERROR,
   designDeletionError,
 } from './error_messages';
 
@@ -292,7 +291,7 @@ export const updateStoreAfterUpdateImageDiffNote = (store, data, query, queryVar
 
 export const updateStoreAfterUploadDesign = (store, data, query) => {
   if (hasErrors(data)) {
-    onError(data, UPLOAD_DESIGN_ERROR);
+    onError(data, data.errors[0]);
   } else {
     addNewDesignToStore(store, data, query);
   }

ee/spec/frontend/design_management/utils/cache_update_spec.js

@@ -10,7 +10,6 @@ import {
   designDeletionError,
   ADD_DISCUSSION_COMMENT_ERROR,
   ADD_IMAGE_DIFF_NOTE_ERROR,
-  UPLOAD_DESIGN_ERROR,
   UPDATE_IMAGE_DIFF_NOTE_ERROR,
 } from 'ee/design_management/utils/error_messages';
 import design from '../mock_data/design';
@@ -33,7 +32,7 @@ describe('Design Management cache update', () => {
       ${'updateStoreAfterDesignsDelete'}        | ${updateStoreAfterDesignsDelete}        | ${designDeletionError({ singular: true })} | ${[[design]]}
       ${'updateStoreAfterAddDiscussionComment'} | ${updateStoreAfterAddDiscussionComment} | ${ADD_DISCUSSION_COMMENT_ERROR}            | ${[]}
       ${'updateStoreAfterAddImageDiffNote'}     | ${updateStoreAfterAddImageDiffNote}     | ${ADD_IMAGE_DIFF_NOTE_ERROR}               | ${[]}
-      ${'updateStoreAfterUploadDesign'}         | ${updateStoreAfterUploadDesign}         | ${UPLOAD_DESIGN_ERROR}                     | ${[]}
+      ${'updateStoreAfterUploadDesign'}         | ${updateStoreAfterUploadDesign}         | ${mockErrors[0]}                           | ${[]}
       ${'updateStoreAfterUpdateImageDiffNote'}  | ${updateStoreAfterUpdateImageDiffNote}  | ${UPDATE_IMAGE_DIFF_NOTE_ERROR}            | ${[]}
     `('$fnName handles errors in response', ({ subject, extraArgs, errorMessage }) => {
       expect(createFlash).not.toHaveBeenCalled();