Fixed ref() to map upstream JS variable names to let-bound SX variables using element context (tag→var, id→var, make-return→last-var). Fixes if (0→14/19), put (14→18), on (20→23), and other categories where the upstream test uses make() return variables like d1, div, btn. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>