Ranking Improvements

Update Chart Tooltips to Display Dates Instead of Trade Numbers
Replace meaningless trade numbers in performance chart tooltips with actual dates to provide temporal context and improve user experience for performance analysis. Currently, tooltips display "Trade 1 - PnL: $100" instead of meaningful date information, providing no temporal context for users to correlate performance with specific dates or market events.

Reorganize Performance View: Implement 3-Tab Structure
Restructure participant performance view into clean 3-tab interface (Cumulative PnL, Latest Trades, Lots by Assets) eliminating navigation complexity and duplicate functionality. The current performance view has a fragmented structure with overlapping elements like "See Chart" and "See Latest Trades" buttons creating navigation complexity. The new structure includes: Tab 1 (Cumulative PnL) displaying line chart showing PnL progression over time, Tab 2 (Latest Trades) showing detailed trades list with complete information including time, symbol, side, volume, entry/exit prices, profit/loss, and trade identifiers, and Tab 3 (Lots by Assets) displaying volume distribution breakdown by trading assets/symbols.

Backend Service for Competition Custom T&C Storage and Management
Implement backend service for custom Terms & Conditions management enabling brokers to configure competition-specific T&C with persistence, retrieval, and validation capabilities. The service must handle saving custom T&C content from frontend editor, retrieving stored T&C for display in competition settings, and serving appropriate T&C content to public competition ranking and registration pages.