Analyze the following code diff and generate a conventional commit message. Rules: - Use conventional commits format: type(scope): description - Types: feat, fix, refactor, docs, style, test, chore, perf - Keep the subject line under 72 characters - Add a body if the change is complex (wrap at 80 chars) - Reference any breaking changes with BREAKING CHANGE: footer - Be specific about what changed and why Output format: ``` type(scope): concise description Optional detailed explanation of what changed and why. Multiple lines if needed. Refs: #issue-number (if applicable) ```