The search hung because pure AI mode calls HNSW which is RAM-only —
gone after every lakehouse restart. Now ALL AI/hybrid searches go
through the /search endpoint which uses brute-force when HNSW isn't
loaded. Added 15s AbortController timeout so fetch never hangs.
Added window.onerror handler to show JS errors on page.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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