The canvas sends NEXT_PUBLIC_ADMIN_TOKEN on all API calls but per-workspace
routes (/activity, /delegations, /traces) use WorkspaceAuth which only
accepts per-workspace bearer tokens. This made the canvas dashboard 401
on every workspace detail view.
Fix: WorkspaceAuth now accepts the admin token as a fallback after
workspace token validation fails. This lets the canvas read all workspace
data with a single admin credential.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>