ADD: changed to rect router

app/lib/invoice-number.ts

@@ -0,0 +1,14 @@
+import prisma from "./prisma";
+
+export async function generateInvoiceNumber(companyId: string): Promise<string> {
+  const year = new Date().getFullYear();
+
+  const company = await prisma.company.update({
+    where: { id: companyId },
+    data: { invoiceSequence: { increment: 1 } },
+    select: { invoicePrefix: true, invoiceSequence: true },
+  });
+
+  const seq = String(company.invoiceSequence).padStart(3, "0");
+  return `${company.invoicePrefix}-${year}-${seq}`;
+}