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)/agents/[id]/page.tsx

@@ -8,7 +8,8 @@
 'use client';
 
 import { useCallback, useState } from 'react';
-import { useRouter, useParams } from 'next/navigation';
+import { useParams } from 'next/navigation';
+import { useRouter } from '@/lib/i18n/routing';
 import { toast } from 'sonner';
 import { AgentTypeDetail, AgentTypeForm } from '@/components/agents';
 import {

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

@@ -8,7 +8,7 @@
 'use client';
 
 import { useState, useCallback, useMemo } from 'react';
-import { useRouter } from 'next/navigation';
+import { useRouter } from '@/lib/i18n/routing';
 import { toast } from 'sonner';
 import { AgentTypeList } from '@/components/agents';
 import { useAgentTypes } from '@/lib/api/hooks/useAgentTypes';

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

@@ -10,7 +10,7 @@
  */
 
 import { useState, use } from 'react';
-import { useRouter } from 'next/navigation';
+import { useRouter } from '@/lib/i18n/routing';
 import { Plus, Upload } from 'lucide-react';
 import { Button } from '@/components/ui/button';
 import { Skeleton } from '@/components/ui/skeleton';
@@ -25,7 +25,7 @@ interface ProjectIssuesPageProps {
 }
 
 export default function ProjectIssuesPage({ params }: ProjectIssuesPageProps) {
-  const { locale, id: projectId } = use(params);
+  const { id: projectId } = use(params);
   const router = useRouter();
 
   // Filter state
@@ -49,7 +49,7 @@ export default function ProjectIssuesPage({ params }: ProjectIssuesPageProps) {
   const { data, isLoading, error } = useIssues(projectId, filters, sort);
 
   const handleIssueClick = (issueId: string) => {
-    router.push(`/${locale}/projects/${projectId}/issues/${issueId}`);
+    router.push(`/projects/${projectId}/issues/${issueId}`);
   };
 
   const handleBulkChangeStatus = () => {

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>
   );

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

@@ -10,7 +10,7 @@
 'use client';
 
 import { useState, useCallback, useMemo } from 'react';
-import { useRouter } from 'next/navigation';
+import { useRouter } from '@/lib/i18n/routing';
 import { toast } from 'sonner';
 import { Plus } from 'lucide-react';
 import { Button } from '@/components/ui/button';