very first commit

src/app/services/telegram.service.ts

@@ -0,0 +1,39 @@
+import { Injectable } from '@angular/core';
+import type { } from '../types/telegram.types';
+
+@Injectable({
+  providedIn: 'root'
+})
+export class TelegramService {
+  private tg = typeof window !== 'undefined' ? window.Telegram?.WebApp : null;
+
+  isTelegramApp(): boolean {
+    return !!this.tg;
+  }
+
+  getUser() {
+    return this.tg?.initDataUnsafe?.user || null;
+  }
+
+  getUserId(): number | null {
+    return this.tg?.initDataUnsafe?.user?.id || null;
+  }
+
+  getUsername(): string | null {
+    return this.tg?.initDataUnsafe?.user?.username || null;
+  }
+
+  getFirstName(): string | null {
+    return this.tg?.initDataUnsafe?.user?.first_name || null;
+  }
+
+  getFullName(): string | null {
+    const user = this.getUser();
+    if (!user) return null;
+    return `${user.first_name}${user.last_name ? ' ' + user.last_name : ''}`;
+  }
+
+  getDisplayName(): string {
+    return this.getUsername() || this.getFullName() || 'Пользователь';
+  }
+}