GET /approvals/pending was registered on the open router with no
middleware, allowing any unauthenticated caller to enumerate all pending
approvals across every workspace on the platform.
Fix: add inline middleware.AdminAuth(db.DB) to the route registration,
matching the pattern used in PR #167 for bundles, events, and viewport.
The three workspace-scoped approvals routes (POST/GET /approvals,
POST /approvals/:id/decide) were already correctly behind WorkspaceAuth
inside the wsAuth group — no change needed there.
Tests: two new regression tests in wsauth_middleware_test.go —
TestAdminAuth_Issue180_ApprovalsListing_NoBearer_Returns401
TestAdminAuth_Issue180_ApprovalsListing_FailOpen_NoTokens
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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