fix: avoid incomplete unrealized result

backend/src/services/portfolio.ts

@@ -252,17 +252,30 @@ export function calculatePortfolioTradeResults(trades: PerformanceTradeRow[], po
     lots.set(key, queue);
     result.set(accountId, current);
   }
-  const positionCost = new Map<string, number>();
-  for (const [key, queue] of lots) positionCost.set(key, queue.reduce((sum, lot) => sum + lot.cost, 0));
+  const incomplete = new Set<number>();
   for (const position of positions) {
     const accountId = Number(position.account_id);
     const current = result.get(accountId) ?? { fees: 0, realized: 0, unrealized: 0 };
     if (position.valuation !== null) {
       const key = `${accountId}:${position.isin ?? position.instrument}`;
-      current.unrealized = (current.unrealized ?? 0) + Number(position.valuation) - (positionCost.get(key) ?? 0);
+      const queue = lots.get(key) ?? [];
+      let remaining = Number(position.quantity);
+      let cost = 0;
+      for (const lot of queue) {
+        if (remaining <= 0) break;
+        const used = Math.min(remaining, lot.quantity);
+        cost += used * (lot.cost / lot.quantity);
+        remaining -= used;
+      }
+      if (remaining > 0.0000001) incomplete.add(accountId);
+      else if (!incomplete.has(accountId)) current.unrealized = (current.unrealized ?? 0) + Number(position.valuation) - cost;
     }
     result.set(accountId, current);
   }
+  for (const accountId of incomplete) {
+    const current = result.get(accountId);
+    if (current) current.unrealized = null;
+  }
   return result;
 }