task-p.4.4

artifacts/pdf-audit/summary.json

@@ -1,5 +1,5 @@
 {
-  "generatedAt": "2026-06-29T06:28:49.019Z",
+  "generatedAt": "2026-06-29T07:31:40.763Z",
   "overallStatus": "PASS",
   "quotationCode": "QT2606-1122",
   "artifacts": {

artifacts/pdf-audit/summary.md

@@ -1,6 +1,6 @@
 # PDF Integrity Summary
 
-- Generated At: 2026-06-29T06:28:49.019Z
+- Generated At: 2026-06-29T07:31:40.763Z
 - Overall Status: PASS
 - Quotation Code: QT2606-1122
 

docs/implementation/pdf-audit-report.json

@@ -1,5 +1,5 @@
 {
-  "generatedAt": "2026-06-29T06:28:46.433Z",
+  "generatedAt": "2026-06-29T07:31:39.763Z",
   "overallStatus": "PASS",
   "quotationCode": "QT2606-1122",
   "expectedFixtureCode": "QT-H5-AUDIT",

docs/implementation/pdf-audit-report.md

@@ -1,6 +1,6 @@
 # PDF Audit Report
 
-- Generated At: 2026-06-29T06:28:46.433Z
+- Generated At: 2026-06-29T07:31:39.763Z
 - Overall Status: PASS
 - Quotation Code: QT2606-1122
 - Template: ALLA Quotation Standard v1.0

next-env.d.ts

@@ -1,6 +1,6 @@
 /// <reference types="next" />
 /// <reference types="next/image-types/global" />
-import "./.next/types/routes.d.ts";
+import "./.next/dev/types/routes.d.ts";
 
 // NOTE: This file should not be edited
 // see https://nextjs.org/docs/app/api-reference/config/typescript for more information.

plans/task-p.4.4.md

@@ -0,0 +1,388 @@
+# Task P.4.4 - Product Item Engine
+
+## Objective
+
+Implement the Product Item Engine for the new section-based PDF runtime.
+
+The Product Item Engine is responsible only for transforming quotation items into a PDFMe-compatible table model.
+
+This task does **not** create or modify PDF templates.
+
+This task does **not** insert Product Item pages.
+
+This task prepares the runtime for Task P.4.5.
+
+---
+
+# Prerequisites
+
+Completed
+
+* P.4 Discovery
+* P.4.1 Runtime Verification
+* P.4.2 Runtime Architecture Design
+* P.4.3 Runtime Refactoring
+* P.4.3.1 Runtime Regression Stabilization
+
+Runtime audit must already pass before implementation begins.
+
+---
+
+# Scope
+
+Included
+
+* Product Item Engine
+* Product Item Builder
+* Product Item Mapping
+* PDFMe Table Model
+* Pagination Model
+* Runtime Contracts
+* Unit Tests
+
+Excluded
+
+* PDF template JSON
+* CRM Template UI
+* Template Version
+* Page insertion
+* Product Item page rendering
+* User render options
+
+---
+
+# Architecture
+
+The runtime shall use the existing section-based architecture.
+
+```text
+Quotation Document
+
+↓
+
+Render Context
+
+↓
+
+Section Composer
+
+↓
+
+Product Item Engine
+
+↓
+
+BuiltSection
+
+↓
+
+Template Assembler
+```
+
+The engine must be completely isolated from
+
+* Topic Engine
+* Signature Resolver
+* Customer Section
+
+---
+
+# Responsibilities
+
+The Product Item Engine shall
+
+* read quotation items
+* normalize data
+* format values
+* build PDFMe table rows
+* calculate row metadata
+* estimate pagination
+* return a BuiltSection
+
+The engine must not know
+
+* page indexes
+* template layouts
+* template JSON
+* page insertion
+* section ordering
+
+---
+
+# Input
+
+Primary source
+
+```text
+documentData.items
+```
+
+The engine shall not query the database.
+
+It receives all data from RenderContext.
+
+---
+
+# Output
+
+Return
+
+```ts
+interface ProductItemSection extends BuiltSection {
+    role: SectionRole.ProductItems;
+
+    rows: ProductItemRow[];
+
+    pagination: PaginationModel;
+
+    tableModel: PdfmeTableModel;
+}
+```
+
+The output must be renderer-independent.
+
+---
+
+# Product Item Mapping
+
+Support at minimum
+
+| Column      | Source      |
+| ----------- | ----------- |
+| Item        | itemNumber  |
+| Description | description |
+| Qty         | quantity    |
+| Unit        | unitLabel   |
+| Unit Price  | unitPrice   |
+| Discount    | discount    |
+| Total       | totalPrice  |
+
+If additional fields exist they should be supported when available.
+
+Examples
+
+* productCode
+* specification
+* remark
+* model
+* brand
+
+Missing optional fields must not fail rendering.
+
+---
+
+# Value Formatting
+
+Use centralized formatters.
+
+Never format inside templates.
+
+Support
+
+* currency
+* decimal quantity
+* percentage
+* empty value normalization
+
+Formatting must remain locale-aware.
+
+---
+
+# PDFMe Table Model
+
+Generate a canonical table model independent of template layout.
+
+Example
+
+```ts
+interface PdfmeTableModel {
+    headers;
+    rows;
+    columnWidths;
+    alignments;
+}
+```
+
+The template consumes this model later.
+
+The engine must not know where the table is rendered.
+
+---
+
+# Pagination Model
+
+Implement pagination metadata.
+
+The engine shall estimate
+
+* row count
+* page count
+* header repetition
+* orphan row prevention
+* available content height
+
+Do not insert pages.
+
+Return only metadata.
+
+Example
+
+```ts
+interface PaginationModel {
+    estimatedPages;
+    rowsPerPage;
+    headerRows;
+    footerRows;
+}
+```
+
+---
+
+# Empty State
+
+When quotation has zero items
+
+Return an empty Product Item section.
+
+Do not throw an exception.
+
+Runtime decides whether the section is rendered.
+
+---
+
+# Error Handling
+
+Generate Runtime Issues for
+
+* invalid quantity
+* invalid price
+* missing mandatory description
+* invalid totals
+
+Do not stop rendering because of one invalid row.
+
+---
+
+# Product Item Builder
+
+Create a dedicated builder.
+
+Responsibilities
+
+* invoke Product Item Engine
+* produce BuiltSection
+* register itself in Section Registry
+
+The builder must not manipulate templates.
+
+---
+
+# Unit Tests
+
+Cover
+
+* 0 items
+* 1 item
+* 10 items
+* 100 items
+* long descriptions
+* missing optional fields
+* currency formatting
+* decimal quantities
+* zero discount
+* non-zero discount
+
+---
+
+# Integration Tests
+
+Verify
+
+* Section Composer accepts Product Item Builder
+* BuiltSection returned correctly
+* Runtime diagnostics preserved
+* Existing sections unaffected
+
+No template rendering yet.
+
+---
+
+# Performance Requirements
+
+Support
+
+* 500 quotation items
+
+without significant performance degradation.
+
+Avoid unnecessary cloning.
+
+Avoid repeated formatting.
+
+---
+
+# Code Quality
+
+* Single Responsibility Principle
+* Strong typing
+* Immutable outputs
+* No duplicated mapping logic
+* Shared formatter usage
+* Shared runtime contracts
+* Builder registration through Section Registry
+
+---
+
+# Deliverables
+
+* Product Item Engine
+* Product Item Builder
+* Product Item Mapping
+* PDFMe Table Model
+* Pagination Model
+* Runtime diagnostics
+* Unit tests
+* Integration tests
+
+---
+
+# Acceptance Criteria
+
+* Product Item Engine is independent from template layout.
+* Engine produces canonical PDFMe table model.
+* Engine does not manipulate templates.
+* Engine does not insert pages.
+* Engine returns pagination metadata only.
+* Existing runtime regression tests remain PASS.
+* Runtime audit continues to pass.
+* Product Item Engine is ready for Task P.4.5.
+
+---
+
+# Out of Scope
+
+## Task P.4.5
+
+* New PDF template
+* Product Item page
+* PDFMe table rendering
+* Page insertion
+* Header repetition in rendered PDF
+
+## Task P.4.6
+
+* CRM Template integration
+* Template version management
+* Preview integration
+
+## Task P.4.7
+
+* Render Policy UI
+* Optional section configuration
+* User-selectable Product Item visibility
+
+---
+
+# Final Success Condition
+
+At the end of Task P.4.4, the runtime is capable of producing a fully normalized Product Item section and PDFMe table model, ready to be rendered by a future template, while the existing PDF output remains unchanged.

src/features/crm/quotations/document/server/pdfme-transforms.ts

@@ -1,8 +1,10 @@
+import { formatDate } from '@/lib/date-format';
+
 const EMPTY_TABLE_FALLBACK = [['-']];
 const PRICE_TABLE_LABEL = 'Price (Exclude VAT)';
 
-function normalizeNumber(
+export function normalizePdfNumber(
-  amount: number | string | null | undefined
+  amount: number | string | null | undefined,
 ): number | null {
   if (typeof amount === 'number' && Number.isFinite(amount)) {
     return amount;
@@ -18,7 +20,7 @@ function normalizeNumber(
 
 export function formatPdfDate(
   dateString: string | Date | null | undefined,
-  language: 'th' | 'en' = 'en'
+  _language: 'th' | 'en' = 'en',
 ): string {
   if (!dateString) {
     return '-';
@@ -35,9 +37,9 @@ export function formatPdfDate(
 
 export function formatPdfCurrency(
   amount: number | string | null | undefined,
-  currencyCode = 'THB'
+  currencyCode = 'THB',
 ): string {
-  const numericAmount = normalizeNumber(amount);
+  const numericAmount = normalizePdfNumber(amount);
 
   if (numericAmount === null) {
     return '-';
@@ -47,12 +49,12 @@ export function formatPdfCurrency(
   const symbols: Record<string, string> = {
     THB: 'THB ',
     USD: '$',
-    EUR: 'EUR '
+    EUR: 'EUR ',
   };
   const symbol = symbols[normalizedCode] ?? `${normalizedCode} `;
   const formatted = new Intl.NumberFormat('en-US', {
     minimumFractionDigits: 2,
-    maximumFractionDigits: 2
+    maximumFractionDigits: 2,
   }).format(numericAmount);
 
   return `${symbol}${formatted}`.trim();
@@ -60,9 +62,9 @@ export function formatPdfCurrency(
 
 export function formatPdfCurrencyAmount(
   amount: number | string | null | undefined,
-  currencyCode = 'THB'
+  currencyCode = 'THB',
 ): string {
-  const numericAmount = normalizeNumber(amount);
+  const numericAmount = normalizePdfNumber(amount);
 
   if (numericAmount === null) {
     return '-';
@@ -72,20 +74,39 @@ export function formatPdfCurrencyAmount(
   const symbols: Record<string, string> = {
     THB: '฿',
     USD: '$',
-    EUR: 'EUR '
+    EUR: 'EUR ',
   };
   const symbol = symbols[normalizedCode] ?? `${normalizedCode} `;
   const formatted = new Intl.NumberFormat('en-US', {
     minimumFractionDigits: 2,
-    maximumFractionDigits: 2
+    maximumFractionDigits: 2,
   }).format(numericAmount);
 
   return `${symbol}${formatted}`.trim();
 }
 
+export function formatPdfDecimal(
+  amount: number | string | null | undefined,
+  options?: {
+    minimumFractionDigits?: number;
+    maximumFractionDigits?: number;
+  },
+): string {
+  const numericAmount = normalizePdfNumber(amount);
+
+  if (numericAmount === null) {
+    return '-';
+  }
+
+  return new Intl.NumberFormat('en-US', {
+    minimumFractionDigits: options?.minimumFractionDigits ?? 0,
+    maximumFractionDigits: options?.maximumFractionDigits ?? 3,
+  }).format(numericAmount);
+}
+
 export function buildPdfPriceTableData(
   amount: number | string | null | undefined,
-  currencyCode?: string | null
+  currencyCode?: string | null,
 ): string[][] {
   const normalizedCurrency = currencyCode?.trim() || 'THB';
 
@@ -93,7 +114,7 @@ export function buildPdfPriceTableData(
     PRICE_TABLE_LABEL,
     formatPdfCurrencyAmount(amount, normalizedCurrency),
     '',
-    normalizedCurrency
+    normalizedCurrency,
   ]];
 }
 
@@ -110,7 +131,8 @@ export function formatTopicItems(topic?: {
         return 0;
       }
 
-      return (left.sortOrder ?? Number.MAX_SAFE_INTEGER) - (right.sortOrder ?? Number.MAX_SAFE_INTEGER);
+      return (left.sortOrder ?? Number.MAX_SAFE_INTEGER) -
+        (right.sortOrder ?? Number.MAX_SAFE_INTEGER);
     })
     .map((item) => {
       if (typeof item === 'string') {
@@ -127,7 +149,7 @@ export function formatTopicItems(topic?: {
 
 export function normalizePdfmeTable(
   value: unknown,
-  columns?: Array<{ sourceField: string; formatMask?: string | null }>
+  columns?: Array<{ sourceField: string; formatMask?: string | null }>,
 ): string[][] {
   if (!Array.isArray(value) || value.length === 0) {
     return EMPTY_TABLE_FALLBACK;
@@ -138,24 +160,20 @@ export function normalizePdfmeTable(
       (row as unknown[]).map((cell) => {
         if (typeof cell === 'string') {
           const trimmedValue = cell.trim();
-
+          return trimmedValue || (cell.length > 0 ? cell : '-');
-          if (trimmedValue) {
-            return trimmedValue;
-          }
-
-          return cell.length > 0 ? cell : '-';
         }
 
         const stringValue = String(cell ?? '').trim();
         return stringValue || '-';
-      })
+      }),
     );
 
     return normalizedRows.length ? normalizedRows : EMPTY_TABLE_FALLBACK;
   }
 
   if (!columns?.length) {
-    return value.map((row) => [String(row ?? '').trim() || '-']) || EMPTY_TABLE_FALLBACK;
+    const rows = value.map((row) => [String(row ?? '').trim() || '-']);
+    return rows.length ? rows : EMPTY_TABLE_FALLBACK;
   }
 
   const rows = value.map((row) => {
@@ -178,4 +196,3 @@ export function normalizePdfmeTable(
 
   return rows.length ? rows : EMPTY_TABLE_FALLBACK;
 }
-import { formatDate } from '@/lib/date-format';

src/features/crm/quotations/document/server/product-item-engine.test.ts

@@ -0,0 +1,346 @@
+import assert from 'node:assert/strict';
+import test from 'node:test';
+import type { Template } from '@pdfme/common';
+import type { ResolvedDocumentTemplate } from '@/features/foundation/document-template/types';
+import type { QuotationDocumentData } from '../types';
+import { resolveTemplatePages } from './page-resolver';
+import { buildProductItemSectionModel } from './product-item-engine';
+import { createRenderContext } from './render-context';
+import { createProductItemSectionBuilder, getQuotationSectionBuilders } from './quotation-pdf-runtime';
+import type { ProductItemSection, RenderPolicy, ResolvedTemplate } from './runtime-contracts';
+import { composeSections } from './section-composer';
+import { adaptTemplateForSectionRuntime } from './template-compatibility-adapter';
+
+function createField(name: string, y: number, height = 7) {
+  return {
+    name,
+    type: 'text',
+    position: { x: 10, y },
+    width: 100,
+    height,
+    content: `{${name}}`,
+  };
+}
+
+function createLegacyTemplate(): Template {
+  return {
+    basePdf: { width: 210, height: 297, padding: [0, 0, 0, 0] },
+    schemas: [
+      [
+        createField('customer_name', 20),
+        createField('quotation_price_data', 40, 20),
+      ],
+      [
+        createField('topic', 35),
+        createField('data_topic', 45, 7),
+        createField('Please_do_not', 225),
+        createField('yours_faithfuly', 232),
+      ],
+    ],
+  } as unknown as Template;
+}
+
+function createResolvedDocumentTemplate(schema: Template): ResolvedDocumentTemplate {
+  return {
+    template: {
+      id: 'template-1',
+      organizationId: 'org-1',
+      documentType: 'quotation',
+      productType: 'default',
+      fileType: 'pdfme',
+      templateName: 'Legacy quotation',
+      description: null,
+      isDefault: true,
+      isActive: true,
+      createdAt: '2026-06-29T00:00:00.000Z',
+      updatedAt: '2026-06-29T00:00:00.000Z',
+    },
+    version: {
+      id: 'template-version-1',
+      templateId: 'template-1',
+      versionNumber: 1,
+      schemaJson: schema,
+      createdAt: '2026-06-29T00:00:00.000Z',
+      updatedAt: '2026-06-29T00:00:00.000Z',
+    },
+  } as unknown as ResolvedDocumentTemplate;
+}
+
+function createItem(
+  index: number,
+  overrides: Partial<QuotationDocumentData['items'][number]> = {},
+): QuotationDocumentData['items'][number] {
+  return {
+    id: `item-${index}`,
+    itemNumber: index + 1,
+    productTypeCode: null,
+    productTypeLabel: null,
+    description: `Product item ${index + 1}`,
+    quantity: 1,
+    unitCode: 'EA',
+    unitLabel: 'EA',
+    unitPrice: 1000 + index,
+    discount: 0,
+    discountTypeCode: null,
+    taxRate: 0,
+    totalPrice: 1000 + index,
+    notes: null,
+    ...overrides,
+  };
+}
+
+function createDocumentData(items: QuotationDocumentData['items']): QuotationDocumentData {
+  return {
+    company: {
+      id: 'company-1',
+      name: 'ALLA',
+      slug: 'alla',
+      imageUrl: null,
+      plan: 'pro',
+    },
+    branch: null,
+    customer: {
+      id: 'customer-1',
+      code: 'C-001',
+      name: 'Customer',
+      address: null,
+      phone: null,
+      email: null,
+      taxId: null,
+    },
+    contact: null,
+    quotation: {
+      id: 'quotation-1',
+      code: 'QT-TEST',
+      quotationDate: '2026-06-29',
+      validUntil: null,
+      projectName: null,
+      projectLocation: null,
+      attention: null,
+      reference: null,
+      revision: 0,
+      revisionLabel: 'Rev.0',
+      statusCode: 'approved',
+      statusLabel: 'Approved',
+      quotationTypeCode: null,
+      quotationTypeLabel: null,
+      currency: 'THB',
+      currencyCode: 'THB',
+      currencyLabel: 'Thai Baht',
+      exchangeRate: 1,
+      subtotal: 0,
+      discount: 0,
+      discountTypeCode: null,
+      discountTypeLabel: null,
+      taxRate: 0,
+      taxAmount: 0,
+      totalAmount: 0,
+      notes: null,
+    },
+    items,
+    quotationCustomers: [],
+    topics: {
+      scope: [],
+      exclusion: [],
+      payment: [],
+      warranty: [],
+      delivery: [],
+      other: [],
+      all: [],
+    },
+    pdfme: {
+      labels: {
+        tel: 'Tel',
+        email: 'Email',
+        att: 'Att',
+        project: 'Project',
+        location: 'Location',
+      },
+      quotation_date: '2026-06-29',
+      quotation_price: 'THB 0.00',
+      quotation_price_data: [],
+      exclusion_data: [],
+      topic_inputs: {},
+    },
+    approval: {
+      requestId: null,
+      workflowName: null,
+      status: 'approved',
+      approvedAt: '2026-06-29T00:00:00.000Z',
+      currentStep: null,
+      currentStepRoleName: null,
+      approvers: [],
+    },
+    signatures: {
+      preparedBy: { name: 'Prepared', position: 'Sales' },
+      approvedBy: { name: 'Approved', position: 'Manager' },
+      authorizedBy: { name: 'Authorized', position: 'Director' },
+    },
+    watermarkStatus: null,
+  };
+}
+
+function createRuntimeContext(items: QuotationDocumentData['items']) {
+  const schema = createLegacyTemplate();
+  const template = createResolvedDocumentTemplate(schema);
+  const runtimeTemplate: ResolvedTemplate = {
+    documentTemplate: template,
+    schema,
+  };
+  const pages = resolveTemplatePages(adaptTemplateForSectionRuntime(runtimeTemplate));
+  const policies: RenderPolicy[] = [
+    { section: 'customer', enabled: true, required: true, visibleWhenEmpty: true },
+    { section: 'product_items', enabled: true, required: false, visibleWhenEmpty: false },
+    { section: 'topics', enabled: true, required: true, visibleWhenEmpty: true },
+    { section: 'conditions', enabled: false, required: false, visibleWhenEmpty: false },
+    { section: 'signature', enabled: false, required: false, visibleWhenEmpty: false },
+    { section: 'attachments', enabled: false, required: false, visibleWhenEmpty: false },
+    { section: 'appendix', enabled: false, required: false, visibleWhenEmpty: false },
+    { section: 'warranty', enabled: false, required: false, visibleWhenEmpty: false },
+    { section: 'cover', enabled: false, required: false, visibleWhenEmpty: false },
+  ];
+
+  return createRenderContext({
+    documentData: createDocumentData(items),
+    template: runtimeTemplate,
+    mappings: [],
+    pages,
+    policies,
+    issues: pages.issues,
+  });
+}
+
+test('product item engine returns empty section model when quotation has no items', () => {
+  const built = buildProductItemSectionModel({ items: [], currencyCode: 'THB' });
+
+  assert.equal(built.rows.length, 0);
+  assert.deepEqual(built.tableModel.headers, [
+    'Item',
+    'Description',
+    'Qty',
+    'Unit',
+    'Unit Price',
+    'Discount',
+    'Total',
+  ]);
+  assert.equal(built.pagination.estimatedPages, 0);
+  assert.deepEqual(built.issues, []);
+});
+
+test('product item engine formats one row with decimal quantity and discount', () => {
+  const built = buildProductItemSectionModel({
+    items: [
+      createItem(0, {
+        quantity: 2.5,
+        unitPrice: 1234.5,
+        discount: 50,
+        totalPrice: 3036.25,
+      }),
+    ],
+    currencyCode: 'THB',
+  });
+
+  assert.equal(built.rows.length, 1);
+  assert.equal(built.rows[0]?.quantity, '2.5');
+  assert.equal(built.rows[0]?.unitPrice, 'THB 1,234.50');
+  assert.equal(built.rows[0]?.discount, 'THB 50.00');
+  assert.equal(built.rows[0]?.total, 'THB 3,036.25');
+  assert.deepEqual(built.tableModel.rows[0], [
+    '1',
+    'Product item 1',
+    '2.5',
+    'EA',
+    'THB 1,234.50',
+    'THB 50.00',
+    'THB 3,036.25',
+  ]);
+});
+
+test('product item engine supports 10 and 100 items with pagination metadata', () => {
+  const tenItems = buildProductItemSectionModel({
+    items: Array.from({ length: 10 }, (_, index) => createItem(index)),
+    currencyCode: 'THB',
+  });
+  const hundredItems = buildProductItemSectionModel({
+    items: Array.from({ length: 100 }, (_, index) => createItem(index)),
+    currencyCode: 'THB',
+  });
+
+  assert.equal(tenItems.rows.length, 10);
+  assert.equal(tenItems.pagination.rowCount, 10);
+  assert.equal(tenItems.pagination.estimatedPages, 1);
+
+  assert.equal(hundredItems.rows.length, 100);
+  assert.ok(hundredItems.pagination.estimatedPages > 1);
+  assert.equal(
+    hundredItems.pagination.rowsPerPage.reduce((sum, value) => sum + value, 0),
+    100,
+  );
+});
+
+test('product item engine increases estimated row height for long descriptions and allows missing optionals', () => {
+  const longDescription = Array.from({ length: 40 }, () => 'long-description').join(' ');
+  const built = buildProductItemSectionModel({
+    items: [
+      createItem(0, {
+        description: longDescription,
+        unitLabel: null,
+        notes: 'extra note',
+      }),
+    ],
+    currencyCode: 'THB',
+  });
+
+  assert.ok((built.rows[0]?.estimatedLineCount ?? 0) > 1);
+  assert.ok((built.rows[0]?.estimatedRowHeight ?? 0) > 24);
+  assert.equal(built.rows[0]?.unit, '-');
+  assert.match(built.rows[0]?.description ?? '', /extra note/);
+});
+
+test('product item engine reports invalid quantity, price, description, and total as runtime issues', () => {
+  const built = buildProductItemSectionModel({
+    items: [
+      createItem(0, {
+        description: '',
+        quantity: Number.NaN,
+        unitPrice: Number.POSITIVE_INFINITY,
+        totalPrice: Number.NaN,
+      }),
+    ],
+    currencyCode: 'THB',
+  });
+
+  assert.deepEqual(
+    built.issues.map((issue) => issue.code).sort(),
+    [
+      'INVALID_PRODUCT_ITEM_PRICE',
+      'INVALID_PRODUCT_ITEM_QUANTITY',
+      'INVALID_PRODUCT_ITEM_TOTAL',
+      'MISSING_PRODUCT_ITEM_DESCRIPTION',
+    ],
+  );
+});
+
+test('section composer accepts product item builder and existing sections remain available', async () => {
+  const context = createRuntimeContext([
+    createItem(0),
+    createItem(1, { discount: 25, totalPrice: 1976 }),
+  ]);
+
+  const section = (await createProductItemSectionBuilder().build(context)) as ProductItemSection;
+  assert.equal(section.rendered, false);
+  assert.equal(section.anchorPageIndex, null);
+  assert.equal(section.rows.length, 2);
+
+  const composed = await composeSections(context, getQuotationSectionBuilders());
+  const sectionRoles = composed.sections.map((item) => item.role);
+
+  assert.deepEqual(sectionRoles, ['customer', 'product_items', 'topics']);
+  const productItemsSection = composed.sections.find(
+    (item): item is ProductItemSection => item.role === 'product_items',
+  );
+  assert.ok(productItemsSection);
+  assert.equal(productItemsSection.tableModel.rows.length, 2);
+  assert.ok(composed.sections.some((item) => item.role === 'customer'));
+  assert.ok(composed.sections.some((item) => item.role === 'topics'));
+});

src/features/crm/quotations/document/server/product-item-engine.ts

@@ -0,0 +1,269 @@
+import type { QuotationDocumentData } from '../types';
+import {
+  formatPdfCurrency,
+  formatPdfDecimal,
+  normalizePdfNumber,
+} from './pdfme-transforms';
+import type {
+  PaginationModel,
+  PdfmeTableModel,
+  ProductItemRow,
+  ProductItemSection,
+  RuntimeIssue,
+} from './runtime-contracts';
+
+const PRODUCT_ITEM_TABLE_HEADERS = [
+  'Item',
+  'Description',
+  'Qty',
+  'Unit',
+  'Unit Price',
+  'Discount',
+  'Total',
+] as const;
+
+const PRODUCT_ITEM_TABLE_WIDTHS = [10, 40, 10, 10, 12, 8, 10] as const;
+const PRODUCT_ITEM_TABLE_ALIGNMENTS = [
+  'center',
+  'left',
+  'right',
+  'center',
+  'right',
+  'right',
+  'right',
+] as const;
+
+const DEFAULT_AVAILABLE_CONTENT_HEIGHT = 648;
+const DEFAULT_BASE_ROW_HEIGHT = 24;
+const DEFAULT_EXTRA_LINE_HEIGHT = 10;
+const DEFAULT_DESCRIPTION_WRAP = 72;
+const DEFAULT_HEADER_ROWS = 1;
+const DEFAULT_FOOTER_ROWS = 0;
+const DEFAULT_ORPHAN_ROW_THRESHOLD = 1;
+
+function estimateDescriptionLineCount(description: string): number {
+  const normalized = description.replace(/\r\n/g, '\n').trim();
+
+  if (!normalized) {
+    return 1;
+  }
+
+  return normalized.split('\n').reduce((total, line) => {
+    const lineLength = line.trim().length;
+    const wrappedLength = Math.max(1, Math.ceil(lineLength / DEFAULT_DESCRIPTION_WRAP));
+    return total + wrappedLength;
+  }, 0);
+}
+
+function createIssue(
+  code: RuntimeIssue['code'],
+  message: string,
+  item: QuotationDocumentData['items'][number],
+  rowIndex: number,
+): RuntimeIssue {
+  return {
+    code,
+    severity: 'warning',
+    message,
+    details: {
+      itemId: item.id,
+      rowIndex,
+      itemNumber: item.itemNumber,
+    },
+  };
+}
+
+function normalizeDescription(item: QuotationDocumentData['items'][number]): string {
+  const descriptionParts = [item.description?.trim(), item.notes?.trim()].filter(
+    (value): value is string => Boolean(value),
+  );
+
+  return descriptionParts.join('\n').trim();
+}
+
+function buildProductItemRow(
+  item: QuotationDocumentData['items'][number],
+  rowIndex: number,
+  currencyCode: string,
+): { row: ProductItemRow; issues: RuntimeIssue[] } {
+  const issues: RuntimeIssue[] = [];
+  const description = normalizeDescription(item);
+  const quantity = normalizePdfNumber(item.quantity);
+  const unitPrice = normalizePdfNumber(item.unitPrice);
+  const discount = normalizePdfNumber(item.discount);
+  const total = normalizePdfNumber(item.totalPrice);
+
+  if (!description) {
+    issues.push(
+      createIssue(
+        'MISSING_PRODUCT_ITEM_DESCRIPTION',
+        'Product item is missing a description.',
+        item,
+        rowIndex,
+      ),
+    );
+  }
+
+  if (quantity === null) {
+    issues.push(
+      createIssue(
+        'INVALID_PRODUCT_ITEM_QUANTITY',
+        'Product item quantity is invalid.',
+        item,
+        rowIndex,
+      ),
+    );
+  }
+
+  if (unitPrice === null) {
+    issues.push(
+      createIssue(
+        'INVALID_PRODUCT_ITEM_PRICE',
+        'Product item unit price is invalid.',
+        item,
+        rowIndex,
+      ),
+    );
+  }
+
+  if (total === null) {
+    issues.push(
+      createIssue(
+        'INVALID_PRODUCT_ITEM_TOTAL',
+        'Product item total is invalid.',
+        item,
+        rowIndex,
+      ),
+    );
+  }
+
+  const estimatedLineCount = estimateDescriptionLineCount(description || '-');
+  const estimatedRowHeight =
+    DEFAULT_BASE_ROW_HEIGHT +
+    Math.max(0, estimatedLineCount - 1) * DEFAULT_EXTRA_LINE_HEIGHT;
+
+  return {
+    row: {
+      sourceItemId: item.id,
+      rowIndex,
+      item: String(item.itemNumber ?? rowIndex + 1),
+      description: description || '-',
+      quantity: formatPdfDecimal(quantity, { minimumFractionDigits: 0, maximumFractionDigits: 3 }),
+      unit: item.unitLabel?.trim() || '-',
+      unitPrice: formatPdfCurrency(unitPrice, currencyCode),
+      discount: formatPdfCurrency(discount ?? 0, currencyCode),
+      total: formatPdfCurrency(total, currencyCode),
+      estimatedLineCount,
+      estimatedRowHeight,
+      raw: {
+        itemNumber: item.itemNumber ?? null,
+        quantity,
+        unitPrice,
+        discount,
+        total,
+      },
+    },
+    issues,
+  };
+}
+
+function buildTableModel(rows: ProductItemRow[]): PdfmeTableModel {
+  return {
+    headers: [...PRODUCT_ITEM_TABLE_HEADERS],
+    rows: rows.map((row) => [
+      row.item,
+      row.description,
+      row.quantity,
+      row.unit,
+      row.unitPrice,
+      row.discount,
+      row.total,
+    ]),
+    columnWidths: [...PRODUCT_ITEM_TABLE_WIDTHS],
+    alignments: [...PRODUCT_ITEM_TABLE_ALIGNMENTS],
+  };
+}
+
+function buildPagination(rows: ProductItemRow[]): PaginationModel {
+  if (rows.length === 0) {
+    return {
+      rowCount: 0,
+      estimatedPages: 0,
+      rowsPerPage: [],
+      headerRows: DEFAULT_HEADER_ROWS,
+      footerRows: DEFAULT_FOOTER_ROWS,
+      repeatHeader: true,
+      orphanRowThreshold: DEFAULT_ORPHAN_ROW_THRESHOLD,
+      availableContentHeight: DEFAULT_AVAILABLE_CONTENT_HEIGHT,
+      pageBreakIndices: [],
+    };
+  }
+
+  const rowsPerPage: number[] = [];
+  const pageBreakIndices: number[] = [];
+  let consumedHeight = 0;
+  let currentPageRowCount = 0;
+
+  rows.forEach((row, index) => {
+    const nextHeight = consumedHeight + row.estimatedRowHeight;
+
+    if (currentPageRowCount > 0 && nextHeight > DEFAULT_AVAILABLE_CONTENT_HEIGHT) {
+      rowsPerPage.push(currentPageRowCount);
+      pageBreakIndices.push(index);
+      consumedHeight = row.estimatedRowHeight;
+      currentPageRowCount = 1;
+      return;
+    }
+
+    consumedHeight = nextHeight;
+    currentPageRowCount += 1;
+  });
+
+  if (currentPageRowCount > 0) {
+    rowsPerPage.push(currentPageRowCount);
+  }
+
+  if (
+    rowsPerPage.length > 1 &&
+    rowsPerPage[rowsPerPage.length - 1] <= DEFAULT_ORPHAN_ROW_THRESHOLD
+  ) {
+    rowsPerPage[rowsPerPage.length - 2] -= 1;
+    rowsPerPage[rowsPerPage.length - 1] += 1;
+
+    if (pageBreakIndices.length > 0) {
+      pageBreakIndices[pageBreakIndices.length - 1] -= 1;
+    }
+  }
+
+  return {
+    rowCount: rows.length,
+    estimatedPages: rowsPerPage.length,
+    rowsPerPage,
+    headerRows: DEFAULT_HEADER_ROWS,
+    footerRows: DEFAULT_FOOTER_ROWS,
+    repeatHeader: true,
+    orphanRowThreshold: DEFAULT_ORPHAN_ROW_THRESHOLD,
+    availableContentHeight: DEFAULT_AVAILABLE_CONTENT_HEIGHT,
+    pageBreakIndices,
+  };
+}
+
+export function buildProductItemSectionModel(args: {
+  items: QuotationDocumentData['items'];
+  currencyCode: string | null | undefined;
+}): Pick<ProductItemSection, 'rows' | 'tableModel' | 'pagination' | 'issues'> {
+  const currencyCode = args.currencyCode?.trim() || 'THB';
+  const issues: RuntimeIssue[] = [];
+  const rows = args.items.map((item, rowIndex) => {
+    const built = buildProductItemRow(item, rowIndex, currencyCode);
+    issues.push(...built.issues);
+    return built.row;
+  });
+
+  return {
+    rows,
+    tableModel: buildTableModel(rows),
+    pagination: buildPagination(rows),
+    issues,
+  };
+}

src/features/crm/quotations/document/server/quotation-pdf-runtime.ts

@@ -1,15 +1,13 @@
-import type { Template } from '@pdfme/common';
+import type { DocumentTemplateMappingWithColumns, ResolvedDocumentTemplate } from '@/features/foundation/document-template/types';
-import type {
-  DocumentTemplateMappingWithColumns,
-  ResolvedDocumentTemplate,
-} from '@/features/foundation/document-template/types';
 import type { QuotationDocumentData } from '../types';
 import { buildPdfTopicPages } from './pdf-topic-engine';
 import { resolveTemplatePages } from './page-resolver';
+import { buildProductItemSectionModel } from './product-item-engine';
 import { createRenderContext, resolveRenderPolicies } from './render-context';
 import { resolveQuotationStaticTemplateInputs } from './static-input-resolver';
 import type {
   BuiltSection,
+  ProductItemSection,
   QuotationPdfRuntimeResult,
   RenderContext,
   ResolvedTemplate,
@@ -23,7 +21,7 @@ function cloneTemplate<T>(value: T): T {
   return JSON.parse(JSON.stringify(value)) as T;
 }
 
-function createCustomerSectionBuilder(): SectionBuilder {
+export function createCustomerSectionBuilder(): SectionBuilder {
   return {
     role: 'customer',
     build(context: RenderContext): BuiltSection<'customer'> {
@@ -61,7 +59,32 @@ function createCustomerSectionBuilder(): SectionBuilder {
   };
 }
 
-function createTopicSectionBuilder(): SectionBuilder {
+export function createProductItemSectionBuilder(): SectionBuilder {
+  return {
+    role: 'product_items',
+    build(context: RenderContext): ProductItemSection {
+      const built = buildProductItemSectionModel({
+        items: context.documentData.items,
+        currencyCode: context.documentData.quotation.currencyCode,
+      });
+
+      return {
+        role: 'product_items',
+        enabled: true,
+        rendered: false,
+        anchorPageIndex: null,
+        pages: [],
+        templateInputPatch: {},
+        issues: built.issues,
+        rows: built.rows,
+        tableModel: built.tableModel,
+        pagination: built.pagination,
+      };
+    },
+  };
+}
+
+export function createTopicSectionBuilder(): SectionBuilder {
   return {
     role: 'topics',
     build(context: RenderContext): BuiltSection<'topics'> {
@@ -103,21 +126,23 @@ function createTopicSectionBuilder(): SectionBuilder {
   };
 }
 
-function getQuotationSectionBuilders(): SectionBuilder[] {
+export function getQuotationSectionBuilders(): SectionBuilder[] {
-  return [createCustomerSectionBuilder(), createTopicSectionBuilder()];
+  return [
+    createCustomerSectionBuilder(),
+    createProductItemSectionBuilder(),
+    createTopicSectionBuilder(),
+  ];
 }
 
-function createResolvedTemplate(
+function createResolvedTemplate(template: ResolvedDocumentTemplate): ResolvedTemplate {
-  template: ResolvedDocumentTemplate,
-): ResolvedTemplate {
   return {
     documentTemplate: template,
-    schema: cloneTemplate(template.version.schemaJson as Template),
+    schema: cloneTemplate(template.version.schemaJson as import('@pdfme/common').Template),
   };
 }
 
 function createRuntimeErrorMessage(): string {
-  return 'Quotation PDF runtime is invalid for the active document template.';
+  return 'Quotation PDF runtime invalid active document template.';
 }
 
 export async function buildQuotationPdfRuntime(args: {

src/features/crm/quotations/document/server/runtime-contracts.ts

@@ -29,7 +29,11 @@ export type RuntimeIssueCode =
   | 'MISSING_MAPPING'
   | 'EMPTY_OPTIONAL_SECTION'
   | 'EMPTY_REQUIRED_SECTION'
-  | 'LEGACY_COMPAT_MODE';
+  | 'LEGACY_COMPAT_MODE'
+  | 'INVALID_PRODUCT_ITEM_QUANTITY'
+  | 'INVALID_PRODUCT_ITEM_PRICE'
+  | 'MISSING_PRODUCT_ITEM_DESCRIPTION'
+  | 'INVALID_PRODUCT_ITEM_TOTAL';
 
 export interface RuntimeIssue {
   code: RuntimeIssueCode;
@@ -82,6 +86,55 @@ export interface BuiltSection<TRole extends SectionRole = SectionRole> {
   issues: RuntimeIssue[];
 }
 
+export type PdfmeTableAlignment = 'left' | 'center' | 'right';
+
+export interface PdfmeTableModel {
+  headers: string[];
+  rows: string[][];
+  columnWidths: number[];
+  alignments: PdfmeTableAlignment[];
+}
+
+export interface ProductItemRow {
+  sourceItemId: string;
+  rowIndex: number;
+  item: string;
+  description: string;
+  quantity: string;
+  unit: string;
+  unitPrice: string;
+  discount: string;
+  total: string;
+  estimatedLineCount: number;
+  estimatedRowHeight: number;
+  raw: {
+    itemNumber: number | null;
+    quantity: number | null;
+    unitPrice: number | null;
+    discount: number | null;
+    total: number | null;
+  };
+}
+
+export interface PaginationModel {
+  rowCount: number;
+  estimatedPages: number;
+  rowsPerPage: number[];
+  headerRows: number;
+  footerRows: number;
+  repeatHeader: boolean;
+  orphanRowThreshold: number;
+  availableContentHeight: number;
+  pageBreakIndices: number[];
+}
+
+export interface ProductItemSection
+  extends BuiltSection<'product_items'> {
+  rows: ProductItemRow[];
+  tableModel: PdfmeTableModel;
+  pagination: PaginationModel;
+}
+
 export interface RenderContext {
   documentData: QuotationDocumentData;
   template: ResolvedTemplate;