fix: use string literals for library accessLevel

src/library-authoring/data/api.mocks.ts

@@ -356,17 +356,17 @@ export async function mockGetLibraryTeam(libraryId: string): Promise<api.Library
 mockGetLibraryTeam.adminMember = {
   username: 'admin-user',
   email: '[email protected]',
-  accessLevel: 'admin',
+  accessLevel: 'admin' as api.LibraryAccessLevel,
 };
 mockGetLibraryTeam.authorMember = {
   username: 'author-user',
   email: '[email protected]',
-  accessLevel: 'author',
+  accessLevel: 'author' as api.LibraryAccessLevel,
 };
 mockGetLibraryTeam.readerMember = {
   username: 'reader-user',
   email: '[email protected]',
-  accessLevel: 'read',
+  accessLevel: 'read' as api.LibraryAccessLevel,
 };
 mockGetLibraryTeam.notMember = {
   username: 'not-user',

src/library-authoring/data/api.ts

@@ -96,16 +96,18 @@ export interface ContentLibrary {
   updated: string | null;
 }
 
+export type LibraryAccessLevel = 'read' | 'author' | 'admin';
+
 export interface LibraryTeamMember {
   username: string;
   email: string;
-  accessLevel: string;
+  accessLevel: LibraryAccessLevel,
 }
 
 export interface AddLibraryTeamMember {
   libraryId: string,
   email: string;
-  accessLevel: string;
+  accessLevel: LibraryAccessLevel,
 }
 
 export interface DeleteLibraryTeamMember {
@@ -114,7 +116,7 @@ export interface DeleteLibraryTeamMember {
 }
 
 export interface UpdateLibraryTeamMember extends DeleteLibraryTeamMember {
-  accessLevel: string;
+  accessLevel: LibraryAccessLevel,
 }
 
 export interface Collection {

src/library-authoring/library-team/LibraryTeam.tsx

@@ -13,6 +13,7 @@ import AlertError from '../../generic/alert-error';
 import Loading from '../../generic/Loading';
 import { ToastContext } from '../../generic/toast-context';
 import { useLibraryContext } from '../common/context';
+import { LibraryAccessLevel } from '../data/api';
 import {
   useContentLibrary,
   useLibraryTeam,
@@ -61,7 +62,7 @@ const LibraryTeam: React.FC<Record<never, never>> = () => {
         libraryId,
         email,
         // New members are created as Readers
-        accessLevel: LibraryRole.Reader.toString(),
+        accessLevel: LibraryRole.Reader.toString() as LibraryAccessLevel,
       }).then(() => {
         showToast(intl.formatMessage(messages.addMemberSuccess));
       }).catch(() => {
@@ -78,7 +79,7 @@ const LibraryTeam: React.FC<Record<never, never>> = () => {
       updateMember.mutateAsync({
         libraryId,
         username,
-        accessLevel: role.toString(),
+        accessLevel: role.toString() as LibraryAccessLevel,
       }).then(() => {
         showToast(intl.formatMessage(messages.updateMemberSuccess));
       }).catch(() => {