feat: JKKP 6/7 PDF generation via pdf-lib, download from incident detail

Also excludes node_modules.nosync from vitest test discovery to fix pre-existing bleed.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01FFDuBhMKvoWjrWT3ZnGmmr

tests/lib/pdf/jkkp.test.ts

@@ -0,0 +1,44 @@
+import { describe, it, expect } from 'vitest'
+import { buildJkkp6Pdf, buildJkkp7Pdf } from '@/lib/pdf/jkkp'
+
+const mockIncident = {
+  reference_no: 'TEST-202607-0001',
+  incident_type: 'injury',
+  description: 'Worker fell from platform',
+  reported_at: new Date('2026-07-01T08:00:00Z').toISOString(),
+  severity: 4,
+  is_fatality: false,
+  is_serious_bodily_injury: true,
+  is_dangerous_occurrence: false,
+  lost_days: 5,
+  site_name: 'Setia Corporation Warehouse 1',
+  reporter_name: 'John Doe',
+}
+
+describe('buildJkkp6Pdf', () => {
+  it('returns a non-empty Uint8Array', async () => {
+    const pdf = await buildJkkp6Pdf(mockIncident)
+    expect(pdf).toBeInstanceOf(Uint8Array)
+    expect(pdf.length).toBeGreaterThan(100)
+  })
+
+  it('PDF bytes start with %PDF', async () => {
+    const pdf = await buildJkkp6Pdf(mockIncident)
+    const header = new TextDecoder().decode(pdf.slice(0, 4))
+    expect(header).toBe('%PDF')
+  })
+})
+
+describe('buildJkkp7Pdf', () => {
+  it('returns a non-empty Uint8Array', async () => {
+    const pdf = await buildJkkp7Pdf(mockIncident)
+    expect(pdf).toBeInstanceOf(Uint8Array)
+    expect(pdf.length).toBeGreaterThan(100)
+  })
+
+  it('PDF bytes start with %PDF', async () => {
+    const pdf = await buildJkkp7Pdf(mockIncident)
+    const header = new TextDecoder().decode(pdf.slice(0, 4))
+    expect(header).toBe('%PDF')
+  })
+})