10 route shells under /[slug]/, role-filtered Nav, backstage stub at /__backstage__, dashboard reads session.products to render tiles. src/lib/session.ts is the canonical role × surface matrix; canSee() is the only RBAC primitive in the portal (real enforcement remains at the API layer). 24 vitest tests; 100% src/lib coverage.
Refs: M5.2
Next.js 16 + Auth.js v5 skeleton: host→slug middleware, tenant-context layout, OIDC sign-in flow against breakpilot-dev realm. 100% coverage on src/lib. Bumps next to 16.2.6 to clear trivy CVEs in 15.0.3.
sharang