feat: auto generate customer code

src/controllers/customer-controller.ts

@@ -96,10 +96,17 @@ export class CustomerController extends Controller {
 
   @Post()
   async create(@Request() req: RequestWithUser, @Body() body: CustomerCreate) {
+    const last = await prisma.customer.findFirst({
+      orderBy: { createdAt: "desc" },
+      where: { customerType: body.customerType },
+    });
+
+    const code = `${body.customerType}${(+(last?.code.slice(-6) || 0) + 1).toString().padStart(6, "0")}`;
+
     const record = await prisma.customer.create({
       data: {
         ...body,
-        code: "CUSTOMER001",
+        code,
         createdBy: req.user.name,
         updateBy: req.user.name,
       },