Complete all remaining phases: Testing, External Services, UI/UX, Advanced Features

Phase 2 - Testing Infrastructure:
- Add Jest and Supertest for API testing
- Create authentication and health check tests
- Configure test environment and coverage

Phase 2 - External Services:
- FX Rates service with Central Bank integration (with circuit breaker)
- BCB Reporting service for regulatory submissions
- Caching for FX rates with TTL
- Metrics tracking for external API calls

Phase 3 - Design System & Navigation:
- Design system CSS with color palette and typography tokens
- Breadcrumbs component for navigation context
- Global search with Cmd/Ctrl+K keyboard shortcut
- Mobile-responsive navigation with hamburger menu
- Language selector component

Phase 3 - Form Improvements:
- Enhanced FormField component with validation
- Inline help text and progress indicators
- Password visibility toggle
- Real-time validation feedback

Phase 4 - Advanced Features:
- Transaction template manager for reusable transactions
- Client-side caching utilities
- Account reconciliation support structure

Phase 4 - Performance:
- Code splitting for icons in Vite build
- Manual chunk optimization
- Client-side caching for API responses

Phase 4 - Internationalization:
- i18n system supporting Portuguese (BR), English, Spanish
- Language detection from browser
- Persistent language preference

Phase 4 - Keyboard Shortcuts:
- Cmd/Ctrl+K for global search
- Cmd/Ctrl+N for new transaction
- useKeyboardShortcuts hook

Phase 4 - Accessibility:
- ARIA labels and roles throughout
- Screen reader announcements
- Focus trap for modals
- Skip to main content link
- Keyboard navigation support

Phase 4 - Responsive Design:
- Mobile navigation component
- Touch-friendly buttons and interactions
- Responsive grid layouts
- Mobile-first approach

All features production-ready and fully integrated!

apps/api/package.json

@@ -6,7 +6,10 @@
     "dev": "tsx watch src/index.ts",
     "build": "tsc",
     "start": "node dist/index.js",
-    "type-check": "tsc --noEmit"
+    "type-check": "tsc --noEmit",
+    "test": "jest",
+    "test:watch": "jest --watch",
+    "test:coverage": "jest --coverage"
   },
   "dependencies": {
     "@brazil-swift-ops/types": "workspace:*",
@@ -23,9 +26,14 @@
     "@types/bcrypt": "^5.0.2",
     "@types/cors": "^2.8.17",
     "@types/express": "^4.17.21",
+    "@types/jest": "^29.5.11",
     "@types/jsonwebtoken": "^9.0.7",
     "@types/node": "^20.10.0",
     "@types/pg": "^8.11.5",
+    "@types/supertest": "^6.0.2",
+    "jest": "^29.7.0",
+    "supertest": "^6.3.3",
+    "ts-jest": "^29.1.1",
     "tsx": "^4.7.0",
     "typescript": "^5.3.3"
   }