Nuxt Ui Guideline: Feedback — Use USkeleton for loading states. Description: Placeholder content during data loading. Do: USkeleton with appropriate size. Don't: Spinner for content loading. Good Example: <USkeleton class="h-4 w-32"/>. Bad Example: <UIcon name="lucide:loader" class="animate-spin"/>. Severity: Low. Docs: https://ui.nuxt.com/docs/components/skeleton.