Replaces 'wouter' with 'react-router-dom' to standardize the routing library and resolve dependency conflicts.
Key changes:
- All routing logic, including hooks (useLocation) and components (Link, Routes), now uses 'react-router-dom'.
- The component tree has been simplified by removing the MainContainer component and moving its layout directly into App.tsx.
- The <BrowserRouter> provider is now correctly placed at the application's entry point in main.tsx.
Converts all functional components from the function Component() {} declaration to the const Component = () => {} syntax. This change improves consistency across the codebase.
