In flex rows (e.g. the add-item/add-section buttons next to a 'Ze šablony…' select on OfferDetail/OrderConfirmationModal/InvoiceDetail), flexbox shrank a button below its text width and wrapped the label onto two lines, making the button tall. The kit Button now defaults to whiteSpace: nowrap (merged with any caller sx, still overridable), so labels stay single-line app-wide.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>