9ecf7f4dfc
Defaults `now` in $props() destructure so each row instance freezes its reference time at mount, instead of calling new Date() inside the $derived every reactivity tick. No behavioural change — the date math is stable across re-renders for a given row — but drops the nullish-coalesce dance and is cleaner under Storybook-style testing where a deterministic `now` is injected. Refs #305 Fixes @felixbrandt suggestion 3 from PR review Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>