Code Review

Review the selected code or recent changes for:

• Bugs and edge cases: Logic errors, null/undefined handling, off-by-one errors
• Security issues: Injection vulnerabilities, exposed secrets, unsafe deserialization, improper input validation
• Performance: Unnecessary loops, memory leaks, inefficient queries
• Readability: Overly complex logic, misleading variable names, missing error handling

Be concise and actionable. For each issue, provide the line reference and a suggested fix.