Svelte Guideline: Virtual Scroll — Use virtua for virtual scrolling. Description: Virtual scrolling for large lists; tanstack/virtual lacks Svelte 5 support. Do: import { VList } from 'virtua/svelte'. Don't: tanstack/virtual (no Svelte 5 support). Good Example: <VList data={items}>{#snippet children(item)}<Row {item}/>{/snippet}</VList>. Bad Example: {#each allItems as item}<Row {item}/>{/each} for 1000+ items. Severity: Medium. Docs: https://github.com/inokawa/virtua.