feat: live position monitoring with charts + trading system production ready

fix: Toy yok policy uygulandı - tüm UI/API endpoint'leri gerçek veriye bağlandı

Production-ready: Eliminate toy data, enforce BUY gates, add API proxies

Use fetchJson wrapper across pages/components

Fix HF health check + remove hardcoded API base

Add missing API endpoints: stocks, movers, scanner, backtest, sentiment, news

Add Next.js components