Check that user.refProviders[provider] is set to a truthy value (#4063)

* Ensure that user.refProviders is set to a truthy value

* Update stories

* Update tests

GitOrigin-RevId: 51919f755f6d3bcb9d3564685253222691b0d92b

services/web/test/frontend/features/file-tree/components/file-tree-create/context-props.js

@@ -4,7 +4,7 @@ export const contextProps = {
   projectId: 'test-project',
   hasWritePermissions: true,
   userHasFeature: () => true,
-  refProviders: {},
+  refProviders: { mendeley: false, zotero: false },
   reindexReferences: () => {
     console.log('reindex references')
   },