UI: hide Timeframe interval for VPIN, Dollar Bars, AggTrades, Liquidations

Add VPIN Flow Toxicity feature

Implement Auto-upload to Hugging Face from Modal Cloud

Update frontend to use Hugging Face Space as backend

Remove request timeouts completely for unlimited execution time

Update ngrok URL after Antigravity restart

Update API fallback to latest ngrok URL after restart

Update API fallback to new ngrok URL

Fix variable name naming ReferenceError in App.jsx

Initial commit: React + FastAPI Dashboard migration