Sheet-based react-hook-form + zod component for yacht CRUD.
CREATE mode uses OwnerPicker to set the yacht's owner (required
by createYachtSchema). EDIT mode hides the picker and shows a
notice directing users to the Transfer button, matching the
service-layer guard that blocks owner mutation via PATCH.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
