fix(admin): cash close report uses cash payments only for expected cash

- expectedCash now = openingCash + cash payments (not total sales)
- difference = actualCash - realExpectedCash
- Closes ADMIN-CLOSURES

project/src/modules/pos/api/pos.routes.ts

@@ -796,9 +796,14 @@ export async function registerPosRoutes(app: FastifyInstance, deps: PosRouteDeps
 
       const completedTotal = salesByState['COMPLETED']?.totalCents ?? 0;
       const openingCash = session.openingCashCents;
-      const expectedCash = completedTotal; // simplified: cash payments only
       const actualCash = session.actualCashCents ?? 0;
       const closingCash = session.closingCashCents ?? 0;
+      // Expected cash = opening + cash payments only (not total sales)
+      const cashPaymentsTotal = paymentResult.rows
+        .filter(p => p.method_code === 'cash' || p.method_code === 'efectivo')
+        .reduce((sum, p) => sum + parseInt(p.total, 10), 0);
+      const realExpectedCash = openingCash + cashPaymentsTotal;
+      const difference = actualCash - realExpectedCash;
 
       return reply.send({
         session: {
@@ -814,8 +819,8 @@ export async function registerPosRoutes(app: FastifyInstance, deps: PosRouteDeps
           openingCashCents: openingCash,
           closingCashCents: closingCash,
           actualCashCents: actualCash,
-          expectedCashCents: expectedCash,
-          differenceCents: (actualCash - closingCash),
+          expectedCashCents: realExpectedCash,
+          differenceCents: difference,
         },
         sales: {
           totalCount: Object.values(salesByState).reduce((s, v) => s + v.count, 0),