fix: ensure non-negative payouts in fund investment calculations

src/app/api/admin/users/[userId]/reset/route.ts

@@ -89,7 +89,7 @@ export async function POST(
     }, 0)
     const fundTotalValue = inv.fund.user.balance + fundPortfolioValue
     const nav = calcFundNav(fundTotalValue, inv.fund.sharesOutstanding)
-    return sum + inv.shares * nav
+    return sum + Math.max(0, inv.shares * nav)
   }, 0)
   const totalValue = user.balance + portfolioValue + fundInvestmentValue
 
@@ -106,7 +106,7 @@ export async function POST(
       }, 0)
       const fundTotalValue = inv.fund.user.balance + fundPortfolioValue
       const nav = calcFundNav(fundTotalValue, inv.fund.sharesOutstanding)
-      const payout = inv.shares * nav
+      const payout = Math.max(0, inv.shares * nav)
       return [
         prisma.hedgeFund.update({
           where: { id: inv.fundId },

src/app/api/user/me/reset/route.ts

@@ -91,7 +91,7 @@ export async function POST(req: NextRequest) {
     }, 0)
     const fundTotalValue = inv.fund.user.balance + fundPortfolioValue
     const nav = calcFundNav(fundTotalValue, inv.fund.sharesOutstanding)
-    return sum + inv.shares * nav
+    return sum + Math.max(0, inv.shares * nav)
   }, 0)
   const totalValue = user.balance + portfolioValue + fundInvestmentValue
 
@@ -108,7 +108,7 @@ export async function POST(req: NextRequest) {
       }, 0)
       const fundTotalValue = inv.fund.user.balance + fundPortfolioValue
       const nav = calcFundNav(fundTotalValue, inv.fund.sharesOutstanding)
-      const payout = inv.shares * nav
+      const payout = Math.max(0, inv.shares * nav)
       return [
         prisma.hedgeFund.update({
           where: { id: inv.fundId },