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/layout/__tests__/dashboard-shell.test.tsx

@@ -0,0 +1,52 @@
+// File: frontend/components/layout/__tests__/dashboard-shell.test.tsx
+// Change Log:
+// - 2026-06-13: Initial creation - test coverage for DashboardShell component
+
+import { describe, it, expect, vi, beforeEach } from 'vitest';
+import { render, screen } from '@testing-library/react';
+import { act } from '@testing-library/react';
+import { DashboardShell } from '../dashboard-shell';
+import { useUIStore } from '@/lib/stores/ui-store';
+
+describe('DashboardShell', () => {
+  beforeEach(() => {
+    act(() => {
+      useUIStore.setState({ isSidebarOpen: true });
+    });
+  });
+
+  it('ควรเรนเดอร์ children ได้ถูกต้อง', () => {
+    render(
+      <DashboardShell>
+        <div>Test Content</div>
+      </DashboardShell>,
+    );
+    expect(screen.getByText('Test Content')).toBeInTheDocument();
+  });
+
+  it('ควรมี class md:ml-[240px] เมื่อ isSidebarOpen เป็น true', () => {
+    act(() => {
+      useUIStore.setState({ isSidebarOpen: true });
+    });
+    const { container } = render(
+      <DashboardShell>
+        <div>Content</div>
+      </DashboardShell>,
+    );
+    const wrapper = container.firstChild as HTMLElement;
+    expect(wrapper.className).toContain('md:ml-[240px]');
+  });
+
+  it('ควรมี class md:ml-[70px] เมื่อ isSidebarOpen เป็น false', () => {
+    act(() => {
+      useUIStore.setState({ isSidebarOpen: false });
+    });
+    const { container } = render(
+      <DashboardShell>
+        <div>Content</div>
+      </DashboardShell>,
+    );
+    const wrapper = container.firstChild as HTMLElement;
+    expect(wrapper.className).toContain('md:ml-[70px]');
+  });
+});