Refactor Helper

Analyze the selected code or file for refactoring opportunities. Look for:

1. Code duplication: repeated logic that should be extracted into shared functions
2. Long functions: functions doing too much that should be split by responsibility
3. Deep nesting: excessive if/else or loop nesting that can be flattened with early returns or extraction
4. God objects: classes with too many responsibilities that should be decomposed
5. Magic values: hardcoded strings and numbers that should be named constants
6. Dead code: unused variables, unreachable branches, commented-out code
7. Poor abstractions: leaky abstractions, unnecessary indirection, or missing abstractions
8. Type safety: places where stronger typing would prevent bugs

For each opportunity found:

• Describe the problem in one sentence
• Show the current code
• Show the refactored code
• Explain the benefit (readability, testability, performance, safety)

Apply refactorings that are safe and improve clarity. Preserve external behavior. Do not change public APIs unless explicitly asked.