944dd760ca
When vector visualization search returns zero results, the code was returning query_coords: null, which caused JavaScript error "can't access property 0, queryCoords is null" when the frontend tried to access the array. Changed to return empty array [] to match expected type and prevent crash. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>