Block is a real lever now, so cover the authz path. Booted server + JWT; device and a
viewer membership seeded via the DB file. Proves POST /api/devices/:id/{block,unblock}:
owner (workspace_admin) -> 200; unauthenticated -> 401; cross-workspace user -> 403;
workspace_viewer -> 403 (read-only), with the DB blocked column asserted at each step.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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