You are performing a comprehensive code review. Please analyze the current changes or specified files and provide:

1. **Code Quality Assessment**
   - Code readability and maintainability
   - Adherence to best practices and design patterns
   - Potential bugs or edge cases

2. **Security Concerns**
   - Vulnerability assessment
   - Input validation issues
   - Authentication/authorization problems

3. **Performance Considerations**
   - Inefficient algorithms or queries
   - Memory leaks or resource management
   - Optimization opportunities

4. **Testing Coverage**
   - Suggest test cases that should be added
   - Identify untested edge cases

5. **Documentation**
   - Missing or unclear comments
   - API documentation needs

Provide specific, actionable feedback with code examples where appropriate.