Add Trading History Display

[wfnuser]

Description

Add a simple trading history display to the frontend, similar to the existing decisions list.

Current Problem

• No way to view historical trades in the frontend
• Can only see trading decisions but not actual trade executions
• Missing visibility into trade outcomes and performance

Requirements

• Backend API endpoint for fetching trading history from database
• Frontend component to display trades list (similar to DecisionsList)
• Basic trade information display:
  • Symbol, side (BUY/SELL), quantity, price
  • Timestamp, P&L, trade status
  • Simple table format like the decisions view

Implementation

Just like the current decisions display:

1. Fetch trade data from database
2. Create a TradesList component
3. Add it to the dashboard

Priority

Medium - Nice to have for better trading visibility