added language routing system

src/app/app.routes.ts

@@ -1,5 +1,6 @@
 import { Routes } from '@angular/router';
 import { brandInfoRoutes, brandLegalRoutes } from './brands/brand-routes';
+import { languageGuard } from './guards/language.guard';
 
 // Core routes (same across all brands)
 const coreRoutes: Routes = [
@@ -29,13 +30,18 @@ const coreRoutes: Routes = [
   }
 ];
 
-// Combine core routes with brand-specific routes
+// All routes sit under a :lang prefix (e.g. /ru/cart, /en/item/5)
 export const routes: Routes = [
-  ...coreRoutes,
-  ...brandInfoRoutes,
-  ...brandLegalRoutes,
   {
-    path: '**',
-    redirectTo: ''
-  }
+    path: ':lang',
+    canActivate: [languageGuard],
+    children: [
+      ...coreRoutes,
+      ...brandInfoRoutes,
+      ...brandLegalRoutes,
+      { path: '**', redirectTo: '' }
+    ]
+  },
+  // URLs without a language prefix → redirect to default language
+  { path: '**', redirectTo: 'ru' }
 ];