Refactoring

Extract code blocks into well-named functions

Safely rename variables, functions, classes across codebase

Find and remove unused code

Simplify complex if/else chains and nested conditions

Extract UI code into reusable components

Find code duplication and extract shared logic

Convert Promise chains to async/await

Convert class-based code to functional style

Convert callback-based code to Promises

Replace magic numbers with named constants

Split long functions into smaller, focused ones

Replace long parameter lists with parameter objects