Emanuel Castillo developed an environment-driven server selector visibility feature for the openMF/web-app repository, focusing on deployment flexibility and user experience consistency. He refactored the server selector logic to depend on a new allowServerSwitch variable within the environment configuration, allowing visibility to be managed across development, staging, and production without code changes. This approach streamlined configuration management and reduced operational risk when switching servers. Emanuel updated all relevant environment files to support the new setting, resolving a visibility bug in the process. His work utilized Angular for front end development, leveraging both JavaScript and TypeScript to implement and integrate the solution.