Trade journal

1. Call get_trade_history for the requested window (default 1m), filtered by ticker if the user names one.
2. Call get_portfolio_performance for the same window to get totals and costs.
3. Group the fills by ticker and present each round trip or position change with:
   • date, side, quantity and price;
   • net value and realized P/L from the tool;
   • costs, with FX conversion fees called out.
4. Ask the user, or infer from the conversation, why each trade was made. Then reflect briefly on what went well, what cost money (fees, FX, timing), and one habit to keep or change.

Never recompute P/L from prices; Trading 212's realisedProfitLoss already includes FX. If the history is truncated, say so. Reply in the user's language.