fix(listview): read tooltip label from DOM textContent, not ReactNode

Owner options have a styled ReactNode label — typeof checks fail and we
fell back to String(value) = "1". Instead, capture the rendered text via
e.currentTarget.textContent at click/keydown time (always the visible
string regardless of label type) and use it as the normalized label.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>