feat(reports): financial hasData existence flag (service + route)

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/app/api/v1/reports/financial/route.ts

@@ -14,6 +14,7 @@ import {
   getRecentPayments,
   getRefundLog,
   getExpenseLedger,
+  financialHasData,
 } from '@/lib/services/reports/financial.service';
 
 /**
@@ -65,6 +66,7 @@ export const GET = withAuth(
         recentPayments,
         refundLog,
         expenseLedger,
+        hasData,
       ] = await Promise.all([
         getFinancialKpis(ctx.portId, range),
         getRevenueByMonth(ctx.portId, range),
@@ -76,6 +78,7 @@ export const GET = withAuth(
         getRecentPayments(ctx.portId, range),
         getRefundLog(ctx.portId, range),
         getExpenseLedger(ctx.portId, range),
+        financialHasData(ctx.portId),
       ]);
 
       return NextResponse.json({
@@ -90,6 +93,7 @@ export const GET = withAuth(
           recentPayments,
           refundLog,
           expenseLedger,
+          hasData,
           range: { from: range.from.toISOString(), to: range.to.toISOString() },
         },
       });