Fix Alpaca 500 internal error by adding 3x retry mechanism and preventing UI screen locks

Add interactive 3 AI Agent Mode Selector UI card & update default High Freq Sniper mode

Add Alpaca Broker Order History Ledger table to Quant.ai Web UI

Fix shadowing app.py and frontend null checks

feat: Integrate Quant.ai into InferRoute gateway under /quant and /api routes

feat: platform ecosystem showcase and UI upgrade