fix(frontend): remove locale-dependent routing and migrate to centralized locale-aware router

- Replaced `next/navigation` with `@/lib/i18n/routing` across components, pages, and tests.
- Removed redundant `locale` props from `ProjectWizard` and related pages.
- Updated navigation to exclude explicit `locale` in paths.
- Refactored tests to use mocks from `next-intl/navigation`.

frontend/src/app/[locale]/(authenticated)/projects/new/page.tsx

@@ -13,17 +13,11 @@ export const metadata: Metadata = {
   description: 'Create a new Syndarix project with AI-powered agents',
 };
 
-interface NewProjectPageProps {
-  params: Promise<{ locale: string }>;
-}
-
-export default async function NewProjectPage({ params }: NewProjectPageProps) {
-  const { locale } = await params;
-
+export default function NewProjectPage() {
   return (
     <div className="min-h-screen bg-background">
       <div className="container mx-auto px-4 py-8">
-        <ProjectWizard locale={locale} />
+        <ProjectWizard />
       </div>
     </div>
   );