I need a quick but thorough swap of an expired API key inside my React-based web application. The project was bootstrapped with create-react-app, so most configuration lives in a .env file, yet a previous developer also left a few hard-coded references in a helper module. Here’s what I expect: • Locate every instance of the old key, replace it with the new one, and refactor the code so the value is pulled from an environment variable rather than hard-coded. • Spin the app up locally, run its standard npm/yarn test suite, and confirm that each call to the external service returns the correct data (HTTP 200, no console errors). • Commit your changes to a dedicated branch, include an updated .env.example, and leave a concise changelog in the README. • Provide either a brief screen recording or terminal log that shows the app building and the API response rendering correctly in the UI. No design work is involved—just the key update and confirmation that the application functions end-to-end. I’m ready to hand over the repository and the new key as soon as you accept.