- Add useStock, useStockCandles, useStockDividends, useBond, useBondCandles hooks
- Add StockDetails component with full share info
- Add BondDetails component with full bond info (NKD, YTM, duration, coupon)
- Add PriceChart component using lightweight-charts (candlestick chart)
- Update StockPage and BondPage with details, charts, and dividends table