- Fixed overly strict user ID validation that rejected string IDs
- Added proper type conversion from string to integer for user IDs
- Ensured compatibility with both string and numeric user ID formats
- Prevents 'Invalid User ID' error for legitimate users
- Enhanced input validation and error handling across all services
- Added comprehensive JSDoc documentation for all major functions
- Improved database operations with transaction management and better error handling
- Added PropTypes validation and error boundaries for React components
- Unified error handling patterns across backend services
- Reduced code duplication in API routes with shared validation functions
- Enhanced security with stricter input validation and SQL injection prevention
- Improved user experience with better error messages and retry functionality
- Refactored AI interpretation table to use proper 1-to-1 relationship with reading records
- Fixed recordId parameter passing in AnalysisResultDisplay component
- Updated database schema to use reading_id instead of analysis_id
- Removed complex string ID generation logic
- Fixed TypeScript type definitions for all ID fields
- Added database migration scripts for AI interpretation refactoring
- Improved error handling and debugging capabilities
- Fixed all database connection errors in aiInterpretation.cjs
- Updated better-sqlite3 API calls from callback to sync methods
- Removed AI interpretation buttons from history page
- Added pagination to history page (10 records per page)
- Fixed mobile responsive design for AI interpretation results
- Updated Koyeb deployment configuration to use npm instead of pnpm
- Resolved API limit issues for history records
- Remove PNG server generation option from DownloadButton component
- Remove PNG generation logic from download route
- Delete pngGenerator.cjs and related test files
- Simplify download options to focus on frontend PNG export
- Reduce server complexity and resource usage
- Implement comprehensive Chinese-style component library
- Add unified typography system with semantic font classes
- Optimize all pages with responsive design and Chinese aesthetics
- Fix button styling and enhance user experience
- Add loading states, empty states, and toast notifications
- Complete 12 Palaces Details optimization
- Establish consistent color scheme and visual hierarchy
