🎨 Palette: Add loading spinner to domain search

[yeboster]

• 💡 What: Replaced the search icon with a loading spinner during domain search in DomainSearch.svelte.
• 🎯 Why: To provide immediate visual feedback that the application is processing the search request.
• ♿ Accessibility: Added aria-label="Searching..." to the spinner for screen readers.
• 🛠️ Fix: Added util to vite-plugin-node-polyfills include list in vite.config.ts to fix Cannot access "util.debuglog" runtime error.

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PR created automatically by Jules for task 2045003591936041737 started by @yeboster

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Project	Deployment	Actions	Updated (UTC)
app	Ready	Preview, Comment	Feb 16, 2026 9:20pm

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