Sub-ticket of MARS-165 INVESTIGATE (not-prejudge): authed post-OAuth /mi-cursada empty-state-vs-404 gap. Row 1 of the triage: a legit OAuth-redirected alumno on the canonical landing got classified genuine-bad-route via the external-referer heuristic. CONFIRM FIRST whether bare /mi-cursada notFound()s for an authed no-active-cursada user (code read says it renders an EMPTY STATE, does NOT 404 — so the 404 is on a different path/referer shape) before prescribing any empty-state fix. Scope: not-found-classify external-referer branch + post-OAuth referer shape. · mars