I’m ready to refine an existing codebase and would like help on three fronts: 1) modernising the user interface, 2) strengthening key functionalities, and 3) running a clean, actionable code review with targeted tests. User-interface goals • Design overhaul that feels fresh and consistent with current branding. • New UI elements where they add real value—think additional screens, controls, or micro-interactions that improve flow. Functionality goals • Triage and resolve outstanding bugs that are hurting stability. • Add new features outlined in the backlog. • Improve the quality of current features so they’re faster, clearer, and easier to maintain. Code review & testing I need a structured review covering architecture, readability, and performance hot-spots. Please annotate problem areas directly in the PR or provide an itemised report. Follow through with unit or integration tests that prove each fix or new feature works. Tech stack details, current repo access, and the feature wish-list will be supplied on project start. I’m aiming for a concise, well-documented pull request (or equivalent) along with a test suite I can run in CI. If you have a strong eye for design and a disciplined approach to refactoring, I’d love to hear how you would tackle this.