## Work Completed ### Frontend API Client Setup - **Created frontend/src/lib/api.ts** with typed API client: - DeviceInfo type (name, model, firmware, status) - OutletStatus type (outlet_id, name, status) - API functions: getDevice(), getOutlets(), getOutlet(id) - Proper error handling and type safety ### Error Handling & Notifications - **Added sonner toast component** for error notifications - Toast notifications trigger on API failures with user-friendly messages - Proper error propagation from API layer ### Components - **Created DeviceInfoCard component** to display PDU device information - Displays device name, model, firmware, and operational status - Responsive layout with proper styling ### Testing - **Added vitest test suite with 8 passing tests**: - API client tests (mock fetch responses) - Component rendering tests - Error handling tests - All tests passing locally ### Environment Configuration - **Configured environment variables:** - NEXT_PUBLIC_API_URL (backend API base URL) - NEXT_PUBLIC_API_KEY (authentication token) - Proper .env.example documentation ### Quality Assurance - All 57 backend tests still pass - Frontend tests verify API client integration - Type safety maintained throughout frontend code - Ready for integration testing with live backend