- Fix vLLM base URL from port 8001 to 8000 (server.py)
- Replace TimeScaleDB first()/last() with array_agg(ORDER BY) for standard PostgreSQL compatibility (TextToSqlService.cs)
- Unify all backend response fields to PascalCase (TextToSqlController.cs)
- Update frontend to match PascalCase response fields (t2s.js)
- Change T2S date inputs to calendar popup (same as hist.html) (t2s.html)
- Fix evt.js date parsing: empty string causes Invalid Date error (evt.js)
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