50db2fcb4b
Generalizes what the USt-IdNr. field already did for an unconfirmed VIES result — every blur-validated field now gets focus put right back on it the moment its own validation fails, instead of letting focus move on to wherever the customer tabbed/clicked next. The correction happens immediately rather than being left for a submit attempt to catch later. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>