added translations

src/app/i18n/translate.service.ts

@@ -0,0 +1,48 @@
+import { Injectable, computed, inject } from '@angular/core';
+import { LanguageService } from '../services/language.service';
+import { Translations } from './translations';
+import { ru } from './ru';
+import { en } from './en';
+import { hy } from './hy';
+
+const translationMap: Record<string, Translations> = { ru, en, hy };
+
+@Injectable({
+  providedIn: 'root',
+})
+export class TranslateService {
+  private langService = inject(LanguageService);
+
+  readonly translations = computed<Translations>(
+    () => translationMap[this.langService.currentLanguage()] ?? ru,
+  );
+
+  /**
+   * Translate a dot-separated key with optional interpolation params.
+   * Usage: t('cart.phoneMoreDigits', { count: 3 }) → "Введите ещё 3 цифр"
+   */
+  t(key: string, params?: Record<string, string | number>): string {
+    const parts = key.split('.');
+    let result: unknown = this.translations();
+
+    for (const part of parts) {
+      if (result && typeof result === 'object') {
+        result = (result as Record<string, unknown>)[part];
+      } else {
+        return key;
+      }
+    }
+
+    if (typeof result !== 'string') {
+      return key;
+    }
+
+    if (params) {
+      return result.replace(/\{\{(\w+)\}\}/g, (_, k) =>
+        params[k] !== undefined ? String(params[k]) : `{{${k}}}`,
+      );
+    }
+
+    return result;
+  }
+}