My React site is throwing functional errors—logic that used to work (button actions, data updates, state changes) no longer behaves as expected even though the UI looks fine. I need a developer the GitHub repo, replicate the issues locally, trace them to their root causes and push clean, well-commented fixes. Deliverables • Patched code pushed to a new branch, ready to merge • Brief changelog outlining the problem and the solution • Quick verification notes or lightweight tests proving the fix