Admin 'Ver como [usuario]' view-as: read-only impersonation of ANY docente (not just owned personas) so admin sees a teacher's exact PLUTO-77-scoped view. Separate viewAsUserId cookie, admin-cap-gated startViewAs/stopViewAs, getCurrentUser resolves target (isViewAs, realUserId=admin), single read-only guard at requireAuthForAction (blocks all writes), benign view-load writes (markComentarioNotificationsRead) no-op under view-as, red banner + Volver a mi cuenta, start/stop audit-logged (authz). No schema change. Scope/grade-gates unchanged. Authz-sensitive: audit design-review + pre-push diff.