Comprehensive Frontend Testing Suite

[TheFakeCreator]

Title: Implement React Testing Library Test Suite for Core Components

Description:
Our frontend currently lacks comprehensive testing. We need to implement tests for all major components and user interactions.

Acceptance Criteria:

• Set up Jest and React Testing Library configuration
• Write tests for all UI components in components/ui/
• Create integration tests for user workflows
• Add MSW (Mock Service Worker) for API mocking
• Achieve 80%+ code coverage
• Set up CI/CD test automation

Technical Details:

• Follow existing backend testing patterns
• Mock React Query hooks for isolated testing
• Test accessibility compliance

Files to Create:

• frontend/src/components/__tests__/ (entire directory)
• frontend/src/test-utils.tsx
• frontend/jest.config.js
• frontend/src/mocks/handlers.ts

Tags: testing frontend infrastructure good-first-issue
Priority: High
Estimated Effort: 8-12 days