Cleanup non-passive event listener warnings

[techniq]

[Violation] Added non-passive event listener to a scroll-blocking event. Consider marking event handler as 'passive' to make the page more responsive. See

• Allow opt-out of Chrome's passive event listener 'intervention' sveltejs/svelte#2068
• https://developer.chrome.com/blog/scrolling-intervention

[techniq]

Occurring much less on upcoming Svelte 5 PR (#458) but still exists

Before	After