- Add KlineChartWidget with pinch-to-zoom, fullscreen mode
- Implement MA, EMA, BOLL indicators for main chart
- Implement MACD, KDJ, RSI indicators for sub chart
- Add volume display with crossline info
- Add C2C trading feature with market/publish/detail pages
- Add P2P transfer functionality (send/receive shares)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>