File: frontend/src/components/Layout.js\n\nIssue: No visual indicator for current page\n\nDifficulty: Medium\n\nWhat to implement:\n1. Track current route\n2. Highlight active nav link\n3. Use NavLink from react-router-dom\n4. Add CSS for active state
File: frontend/src/components/Layout.js\n\nIssue: No visual indicator for current page\n\nDifficulty: Medium\n\nWhat to implement:\n1. Track current route\n2. Highlight active nav link\n3. Use NavLink from react-router-dom\n4. Add CSS for active state