Fix agent volume

src/Managing.WebApp/src/pages/dashboardPage/agentSearch.tsx

@@ -99,10 +99,17 @@ function AgentSearch({ index }: { index: number }) {
       ? agentData.strategies.reduce((sum, strategy) => sum + (strategy.winRate || 0), 0) / agentData.strategies.length 
       : 0
     
+    // Calculate total collateral from all positions (quantity * price)
+    const totalCollateral = agentData.positions.reduce((sum, position) => {
+      const collateral = (position.Open?.quantity || 0) * (position.Open?.price || 0)
+      return sum + collateral
+    }, 0)
+    
     return {
       totalPnL,
       totalNetPnL,
       totalVolume,
+      totalCollateral,
       totalWins,
       totalLosses,
       avgWinRate,
@@ -460,7 +467,7 @@ function AgentSearch({ index }: { index: number }) {
                 <div className="stat-title text-xs">ROI</div>
                 <div className="stat-value text-lg">
                   <span className={summary.totalNetPnL >= 0 ? 'text-green-500' : 'text-red-500'}>
-                    {((summary.totalNetPnL / (summary.totalVolume || 1)) * 100).toFixed(2)}%
+                    {((summary.totalNetPnL / (summary.totalCollateral || 1)) * 100).toFixed(2)}%
                   </span>
                 </div>
                 <div className="stat-desc text-xs">Return on Investment</div>