fix: serialize Prisma Decimal fields before server→client boundary

Convert quantity, unitPrice, totalPrice, gstRate, and totalAmount to
plain numbers in server pages before passing to client components,
preventing Next.js serialization errors on Decimal objects.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

App/pelagia-portal/app/(portal)/approvals/[id]/manager-edit-po-form.tsx

@@ -6,10 +6,25 @@ import { managerEditPo } from "./manager-po-edit-actions";
 import { LineItemsEditor } from "@/components/po/po-line-items-editor";
 import { TC_DEFAULTS, TC_FIXED_LINE } from "@/lib/validations/po";
 import type { LineItemInput } from "@/lib/validations/po";
-import type { Vessel, Account, Vendor, PurchaseOrder, POLineItem } from "@prisma/client";
+import type { Vessel, Account, Vendor, PurchaseOrder } from "@prisma/client";
 
-type PoFull = PurchaseOrder & {
+type SerializedLineItem = {
-  lineItems: POLineItem[];
+  id: string;
+  poId: string;
+  description: string;
+  quantity: number;
+  unit: string;
+  size: string | null;
+  unitPrice: number;
+  totalPrice: number;
+  gstRate: number;
+  sortOrder: number;
+  productId: string | null;
+};
+
+type PoFull = Omit<PurchaseOrder, "totalAmount"> & {
+  totalAmount: number;
+  lineItems: SerializedLineItem[];
   vessel: { id: string; name: string };
   account: { id: string; name: string; code: string };
   vendor: { id: string; name: string; vendorId: string | null } | null;
@@ -45,11 +60,11 @@ export function ManagerEditPoForm({ po, vessels, accounts, vendors }: Props) {
   const [lineItems, setLineItems] = useState<LineItemInput[]>(
     po.lineItems.map((li) => ({
       description: li.description,
-      quantity: Number(li.quantity),
+      quantity: li.quantity,
       unit: li.unit,
       size: li.size ?? undefined,
-      unitPrice: Number(li.unitPrice),
+      unitPrice: li.unitPrice,
-      gstRate: Number((li as POLineItem & { gstRate?: unknown }).gstRate ?? 0.18),
+      gstRate: li.gstRate,
     }))
   );
 

App/pelagia-portal/app/(portal)/approvals/[id]/page.tsx

@@ -43,6 +43,18 @@ export default async function ApprovalDetailPage({ params }: Props) {
   if (!po) notFound();
   if (po.status !== "MGR_REVIEW") redirect(`/po/${id}`);
 
+  const serializedPo = {
+    ...po,
+    totalAmount: po.totalAmount.toNumber(),
+    lineItems: po.lineItems.map((li) => ({
+      ...li,
+      quantity: li.quantity.toNumber(),
+      unitPrice: li.unitPrice.toNumber(),
+      totalPrice: li.totalPrice.toNumber(),
+      gstRate: li.gstRate.toNumber(),
+    })),
+  };
+
   return (
     <div className="max-w-4xl">
       <div className="mb-6 flex items-center justify-between">
@@ -55,7 +67,7 @@ export default async function ApprovalDetailPage({ params }: Props) {
       <PoDetail po={po} currentUserId={session.user.id} currentRole={session.user.role} readOnly />
 
       <ManagerEditPoForm
-        po={po}
+        po={serializedPo}
         vessels={vessels}
         accounts={accounts}
         vendors={vendors}

App/pelagia-portal/app/(portal)/po/[id]/edit/edit-po-form.tsx

@@ -3,7 +3,7 @@
 import { useState } from "react";
 import { useRouter } from "next/navigation";
 import { updatePo } from "./actions";
-import type { Vessel, Account, Vendor, PurchaseOrder, POLineItem } from "@prisma/client";
+import type { Vessel, Account, Vendor, PurchaseOrder } from "@prisma/client";
 import { LineItemsEditor } from "@/components/po/po-line-items-editor";
 import type { LineItemInput } from "@/lib/validations/po";
 import { TC_DEFAULTS, TC_FIXED_LINE } from "@/lib/validations/po";
@@ -11,7 +11,24 @@ import { TC_DEFAULTS, TC_FIXED_LINE } from "@/lib/validations/po";
 const INPUT_CLS =
   "w-full rounded-lg border border-neutral-300 px-3 py-2.5 text-sm focus:border-primary-500 focus:outline-none focus:ring-2 focus:ring-primary-500/20";
 
-type PoWithItems = PurchaseOrder & { lineItems: POLineItem[] };
+type SerializedLineItem = {
+  id: string;
+  poId: string;
+  description: string;
+  quantity: number;
+  unit: string;
+  size: string | null;
+  unitPrice: number;
+  totalPrice: number;
+  gstRate: number;
+  sortOrder: number;
+  productId: string | null;
+};
+
+type PoWithItems = Omit<PurchaseOrder, "totalAmount"> & {
+  totalAmount: number;
+  lineItems: SerializedLineItem[];
+};
 
 interface Props {
   po: PoWithItems;
@@ -25,11 +42,11 @@ export function EditPoForm({ po, vessels, accounts, vendors }: Props) {
   const [lineItems, setLineItems] = useState<LineItemInput[]>(
     po.lineItems.map((li) => ({
       description: li.description,
-      quantity: Number(li.quantity),
+      quantity: li.quantity,
       unit: li.unit,
       size: li.size ?? undefined,
-      unitPrice: Number(li.unitPrice),
+      unitPrice: li.unitPrice,
-      gstRate: Number((li as POLineItem & { gstRate: unknown }).gstRate ?? 0.18),
+      gstRate: li.gstRate,
     }))
   );
   const [submitting, setSubmitting] = useState<"save" | "resubmit" | null>(null);
@@ -64,24 +81,14 @@ export function EditPoForm({ po, vessels, accounts, vendors }: Props) {
   const dateValue = po.dateRequired
     ? new Date(po.dateRequired).toISOString().split("T")[0]
     : "";
-  const piDateValue = (po as PurchaseOrder & { piQuotationDate: Date | null }).piQuotationDate
+  const piDateValue = po.piQuotationDate
-    ? new Date((po as PurchaseOrder & { piQuotationDate: Date | null }).piQuotationDate!).toISOString().split("T")[0]
+    ? new Date(po.piQuotationDate).toISOString().split("T")[0]
     : "";
-  const reqDateValue = (po as PurchaseOrder & { requisitionDate: Date | null }).requisitionDate
+  const reqDateValue = po.requisitionDate
-    ? new Date((po as PurchaseOrder & { requisitionDate: Date | null }).requisitionDate!).toISOString().split("T")[0]
+    ? new Date(po.requisitionDate).toISOString().split("T")[0]
     : "";
 
-  const extPo = po as PurchaseOrder & {
+  const extPo = po;
-    piQuotationNo: string | null;
-    requisitionNo: string | null;
-    placeOfDelivery: string | null;
-    tcDelivery: string | null;
-    tcDispatch: string | null;
-    tcInspection: string | null;
-    tcTransitInsurance: string | null;
-    tcPaymentTerms: string | null;
-    tcOthers: string | null;
-  };
 
   return (
     <form id="edit-po-form" className="space-y-6" onSubmit={(e) => e.preventDefault()}>

App/pelagia-portal/app/(portal)/po/[id]/edit/page.tsx

@@ -35,13 +35,25 @@ export default async function EditPoPage({ params }: Props) {
     db.vendor.findMany({ where: { isActive: true }, orderBy: { name: "asc" } }),
   ]);
 
+  const serializedPo = {
+    ...po,
+    totalAmount: po.totalAmount.toNumber(),
+    lineItems: po.lineItems.map((li) => ({
+      ...li,
+      quantity: li.quantity.toNumber(),
+      unitPrice: li.unitPrice.toNumber(),
+      totalPrice: li.totalPrice.toNumber(),
+      gstRate: li.gstRate.toNumber(),
+    })),
+  };
+
   return (
     <div className="max-w-4xl">
       <div className="mb-6">
         <h1 className="text-2xl font-semibold text-neutral-900">Edit Purchase Order</h1>
         <p className="mt-1 text-sm text-neutral-500 font-mono">{po.poNumber}</p>
       </div>
-      <EditPoForm po={po} vessels={vessels} accounts={accounts} vendors={vendors} />
+      <EditPoForm po={serializedPo} vessels={vessels} accounts={accounts} vendors={vendors} />
     </div>
   );
 }