Add global navigation search, cancellation policies, and UI improvements

- Add global search in top bar for navigating to dashboard pages
- Add cancellation policy settings (window hours, late fee, deposit refund)
- Display booking policies on customer confirmation page
- Filter API tokens by sandbox/live mode
- Widen settings layout and full-width site builder
- Add help documentation search with OpenAI integration
- Add blocked time ranges API for calendar visualization
- Update business hours settings with holiday management

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

frontend/src/contexts/__tests__/SandboxContext.test.tsx

@@ -20,6 +20,15 @@ vi.mock('../../hooks/useSandbox', () => ({
   useToggleSandbox: vi.fn(),
 }));
 
+// Mock the entitlements hook
+vi.mock('../../hooks/useEntitlements', () => ({
+  useEntitlements: vi.fn(() => ({
+    hasFeature: vi.fn(() => true), // Default to having API access
+    features: { api_access: true },
+    isLoading: false,
+  })),
+}));
+
 import { SandboxProvider, useSandbox } from '../SandboxContext';
 import { useSandboxStatus, useToggleSandbox } from '../../hooks/useSandbox';