🌐(frontend) add Content-Language on doc access endpoint

We send an internationalized email from
the POST /api/docs/:docId/access endpoint.
We add the language of the website with the
Content-Language header.

src/frontend/apps/e2e/__tests__/app-impress/doc-member-create.spec.ts

@@ -121,6 +121,9 @@ test.describe('Document create member', () => {
     ).toBeVisible();
     const responseAddUser = await responsePromiseAddUser;
     expect(responseAddUser.ok()).toBeTruthy();
+    expect(responseAddUser.request().headers()['content-language']).toBe(
+      'en-us',
+    );
   });
 
   test('it try to add twice the same user', async ({ page, browserName }) => {

src/frontend/apps/impress/src/features/docs/members/members-add/api/useCreateDocAccess.tsx

@@ -9,6 +9,7 @@ import {
   Role,
 } from '@/features/docs/doc-management';
 import { KEY_LIST_DOC_ACCESSES } from '@/features/docs/members/members-list';
+import { ContentLanguage } from '@/i18n/types';
 
 import { OptionType } from '../types';
 
@@ -18,15 +19,20 @@ interface CreateDocAccessParams {
   role: Role;
   docId: Doc['id'];
   memberId: User['id'];
+  contentLanguage: ContentLanguage;
 }
 
 export const createDocAccess = async ({
   memberId,
   role,
   docId,
+  contentLanguage,
 }: CreateDocAccessParams): Promise<Access> => {
   const response = await fetchAPI(`documents/${docId}/accesses/`, {
     method: 'POST',
+    headers: {
+      'Content-Language': contentLanguage,
+    },
     body: JSON.stringify({
       user_id: memberId,
       role,

src/frontend/apps/impress/src/features/docs/members/members-add/components/AddMembers.tsx

@@ -62,6 +62,7 @@ export const AddMembers = ({ currentRole, doc }: ModalAddMembersProps) => {
             role: selectedRole,
             docId: doc.id,
             memberId: selectedUser.value.id,
+            contentLanguage,
           });
           break;
       }