fix: 员工端首页应发合计显示为0

后端返回字段是 totalPay，前端误用 grossPay（不存在的字段），
导致应发合计始终显示 0。

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Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>

backend/scripts/check-payslip.ts

@@ -0,0 +1,24 @@
+import prisma from '../src/lib/prisma'
+
+async function main() {
+  const payslips = await prisma.$queryRaw<any[]>`
+    SELECT month, status, "publishStatus", count(*)::int as cnt
+    FROM "Payslip" WHERE month='2026-08'
+    GROUP BY month, status, "publishStatus"
+  `
+  console.log('Payslip 2026-08:', JSON.stringify(payslips, null, 2))
+
+  const batches = await prisma.$queryRaw<any[]>`
+    SELECT id, name, month, status, "batchNo"::text as bn
+    FROM "PayrollBatch" WHERE month='2026-08' ORDER BY "batchNo"
+  `
+  console.log('Batches 2026-08:', JSON.stringify(batches, null, 2))
+
+  const totalPayslips = await prisma.$queryRaw<any[]>`
+    SELECT count(*)::int as cnt FROM "Payslip" WHERE month='2026-08'
+  `
+  console.log('Total payslips 2026-08:', JSON.stringify(totalPayslips))
+
+  await prisma.$disconnect()
+}
+main()