Add CloudStorageView (/cloud) and CloudFolderView (/cloud/:provider/:folderId).
Tree items filter to directories only (is_dir) to hide files in the nav tree.
CloudProviderTreeItem root click navigates to /cloud/{provider}/root instead
of /settings. AppSidebar Cloud Storage link upgraded to router-link with
active-class highlighting. Router registers both cloud routes with requiresAuth.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
curo1305
5250895587