feat(ai): add ADR-036 unified OCR architecture and frontend test coverage

- Add ADR-036 unified OCR architecture (typhoon-ocr via Ollama)
- Extend AI execution profiles for OCR sandbox configuration
- Add comprehensive frontend test coverage (components, hooks, services)
- Add backend test coverage for document-numbering services
- Update OCR sidecar with typhoon-ocr integration
- Add AI policy service and execution profile management
- Update AGENTS.md and architecture documentation

frontend/components/common/__tests__/workflow-error-boundary.test.tsx

@@ -0,0 +1,45 @@
+// File: frontend/components/common/__tests__/workflow-error-boundary.test.tsx
+// Change Log:
+// - 2026-06-13: Initial creation - test coverage for WorkflowErrorBoundary component
+
+import { describe, it, expect, vi, beforeEach } from 'vitest';
+import { render, screen } from '@testing-library/react';
+import { WorkflowErrorBoundary } from '../workflow-error-boundary';
+
+const ProblematicComponent = () => {
+  throw new Error('Test crash error');
+};
+
+describe('WorkflowErrorBoundary Component', () => {
+  beforeEach(() => {
+    vi.clearAllMocks();
+    vi.spyOn(console, 'error').mockImplementation(() => {});
+  });
+
+  it('ควรเรนเดอร์ children ตามปกติเมื่อไม่มีข้อผิดพลาด', () => {
+    render(
+      <WorkflowErrorBoundary>
+        <div>Safe Content</div>
+      </WorkflowErrorBoundary>
+    );
+    expect(screen.getByText('Safe Content')).toBeInTheDocument();
+  });
+
+  it('ควรเรนเดอร์ default message เมื่อตรวจพบข้อผิดพลาดใน Component ย่อย', () => {
+    render(
+      <WorkflowErrorBoundary>
+        <ProblematicComponent />
+      </WorkflowErrorBoundary>
+    );
+    expect(screen.getByText('เกิดข้อผิดพลาด ไม่สามารถแสดง Workflow ได้ กรุณารีเฟรชหน้า')).toBeInTheDocument();
+  });
+
+  it('ควรเรนเดอร์ custom fallback เมื่อตรวจพบข้อผิดพลาดและส่ง fallback มาให้', () => {
+    render(
+      <WorkflowErrorBoundary fallback={<div>Custom Error Alert</div>}>
+        <ProblematicComponent />
+      </WorkflowErrorBoundary>
+    );
+    expect(screen.getByText('Custom Error Alert')).toBeInTheDocument();
+  });
+});