Close the two coverage gaps in the external-mounts feature — the admin
REST surface and the admin UI tab both previously had no automated tests.
Backend (hurl):
- tests/api/external_mounts.hurl — black-box coverage of the admin mount
endpoints (list / create / delete): input validation (empty name,
non-existent host path → 400), create → 201 with the full view, the
mount appears in the list, delete → 204 then 404, and the /api/admin
middleware denies a non-admin on every verb → 403.
- server.env: enable OXICLOUD_ENABLE_EXTERNAL_MOUNTS for the test server;
run.sh: register the new scenario.
Frontend (vitest):
- admin/page.test.ts — opening the mounts tab loads + lists mounts,
the create form calls createExternalMount, and delete goes through the
confirm modal to deleteExternalMount.
Tooling:
- devenv.nix: add b3sum (used by tests/api/run.sh's storage-integrity check).