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

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

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

@@ -20,6 +20,7 @@ import {
   getClosingThisMonth,
   getRecentWins,
   getLostReasonBreakdown,
+  salesHasData,
 } from '@/lib/services/reports/sales.service';
 
 /**
@@ -87,6 +88,7 @@ export const GET = withAuth(
         recentWins,
         lostReasonBreakdown,
         priorKpis,
+        hasData,
       ] = await Promise.all([
         getSalesKpis(ctx.portId, range),
         getPipelineFunnel(ctx.portId),
@@ -105,6 +107,7 @@ export const GET = withAuth(
         // with the main batch (depends only on the derived priorBounds);
         // resolves to null when the toggle is off so we pay nothing.
         priorBounds ? getSalesKpis(ctx.portId, priorBounds) : Promise.resolve(null),
+        salesHasData(ctx.portId),
       ]);
 
       const comparison =
@@ -134,6 +137,7 @@ export const GET = withAuth(
           closingThisMonth,
           recentWins,
           lostReasonBreakdown,
+          hasData,
           range: {
             from: range.from.toISOString(),
             to: range.to.toISOString(),