changes for md

src/app/app.config.ts

@@ -4,6 +4,7 @@ import { provideHttpClient, withInterceptors } from '@angular/common/http';
 
 import { routes } from './app.routes';
 import { cacheInterceptor } from './interceptors/cache.interceptor';
+import { apiHeadersInterceptor } from './interceptors/api-headers.interceptor';
 import { provideServiceWorker } from '@angular/service-worker';
 
 export const appConfig: ApplicationConfig = {
@@ -15,7 +16,7 @@ export const appConfig: ApplicationConfig = {
       withInMemoryScrolling({ scrollPositionRestoration: 'top' })
     ),
     provideHttpClient(
-      withInterceptors([cacheInterceptor])
+      withInterceptors([apiHeadersInterceptor, cacheInterceptor])
     ),
     provideServiceWorker('ngsw-worker.js', {
       enabled: !isDevMode(),

src/app/interceptors/api-headers.interceptor.ts

@@ -0,0 +1,37 @@
+import { HttpInterceptorFn } from '@angular/common/http';
+import { inject } from '@angular/core';
+import { LocationService } from '../services/location.service';
+import { LanguageService } from '../services/language.service';
+import { environment } from '../../environments/environment';
+
+/**
+ * Interceptor that attaches X-Region and X-Language headers
+ * to every outgoing request aimed at our API.
+ *
+ * The backend reads these headers to:
+ *  - filter catalog by region
+ *  - return translated content in the requested language
+ */
+export const apiHeadersInterceptor: HttpInterceptorFn = (req, next) => {
+  // Only attach headers to our own API requests
+  if (!req.url.startsWith(environment.apiUrl)) {
+    return next(req);
+  }
+
+  const locationService = inject(LocationService);
+  const languageService = inject(LanguageService);
+
+  const regionId = locationService.regionId();       // '' when global
+  const lang = languageService.currentLanguage();     // 'ru' | 'en' | 'hy'
+
+  let headers = req.headers;
+
+  if (regionId) {
+    headers = headers.set('X-Region', regionId);
+  }
+  if (lang) {
+    headers = headers.set('X-Language', lang);
+  }
+
+  return next(req.clone({ headers }));
+};