fix: correct MFE/MAE tracking after partial exits

lib/trading/position-manager.ts

@@ -562,8 +562,8 @@ export class PositionManager {
       trade.direction
     )
     
-    const accountPnL = profitPercent * trade.leverage
-    trade.unrealizedPnL = (trade.currentSize * profitPercent) / 100
+  const accountPnL = profitPercent * trade.leverage
+  trade.unrealizedPnL = (trade.currentSize * accountPnL) / 100
 
     // Track peak P&L (MFE - Maximum Favorable Excursion)
     if (trade.unrealizedPnL > trade.peakPnL) {
@@ -873,6 +873,11 @@ export class PositionManager {
     console.log('✅ All positions closed')
   }
 
+  refreshConfig(): void {
+    this.config = getMergedConfig()
+    console.log('⚙️ Position manager config refreshed from environment')
+  }
+
   private async handlePostTp1Adjustments(trade: ActiveTrade, context: string): Promise<void> {
     if (trade.currentSize <= 0) {
       console.log(`⚠️ Skipping TP1 adjustments for ${trade.symbol} (${context}) because current size is $${trade.currentSize.toFixed(2)}`)