super3 / feed / 16859848425

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Complete medium priority refactoring tasks (#4, #5, #6)

Task #4: Implement Proper Logging
- Added Winston logger with environment-aware configuration
- Replaced all console.log/error statements with structured logging
- Silent logging during tests (NODE_ENV=test)
- Log levels: debug, info, warn, error
- Structured metadata for better observability

Task #5: Consolidate Test Utilities
- Created test/helpers/ directory with organized utilities
- Extracted mock-storage.js for storage mocking
- Extracted mock-reddit-api.js for API mocking
- Extracted test-fixtures.js for shared test data
- Eliminated duplicate mock setup code across tests

Task #6: Standardize API Responses
- Enhanced lib/utils/error-handler.js with standardized response utilities
- Implemented consistent response format (success/data/meta/error structure)
- Added proper HTTP status codes for all scenarios
- Added comprehensive request validation middleware
- Updated all API endpoints to use standardized format
- Maintained backward compatibility where possible

All tests passing (107/107) with excellent coverage:
- Branches: 85.46% (threshold: 78%)
- Functions: 98.3% (threshold: 80%)
- Lines: 98% (threshold: 80%)
- Statements: 98.03% (threshold: 80%)

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

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

147 of 172 branches covered (85.47%)

Branch coverage included in aggregate %.

60 of 64 new or added lines in 7 files covered. (93.75%)

295 of 301 relevant lines covered (98.01%)

8.73 hits per line