refactor: Use Named Routes Instead of Hardcoded URLs

[impruthvi]

This PR replaces hardcoded URLs with Laravel's route() helper function across various components, layouts, and tests. This change improves maintainability, ensuring routes remain dynamic and consistent even if route definitions change in the backend.

Changes

• Updated navigation links in AppHeader, AppSidebar, and settings/layout.tsx to use route() instead of hardcoded URLs.
• Modified breadcrumbs and sidebar navigation to reference named routes.
• Updated feature tests in DashboardTest.php to use route() for better accuracy and consistency.

[taylorotwell]

Going to table this for now until dust settles a bit.

[impruthvi]

@taylorotwell
Understood! Let me know if there's anything I can do or if any changes are needed when you're ready to revisit this. Thanks!