AI Implementation feature(841): First-Start Create Admin Modal 1.00 (#3)

frontend/src/app/core/services/admin.service.ts

@@ -0,0 +1,20 @@
+import { Injectable, inject } from '@angular/core';
+import { HttpClient } from '@angular/common/http';
+import { firstValueFrom } from 'rxjs';
+
+export interface AdminUser {
+  id: string;
+  username: string;
+  role: 'admin' | 'player';
+}
+
+@Injectable({ providedIn: 'root' })
+export class AdminService {
+  private readonly http = inject(HttpClient);
+
+  async listUsers(): Promise<AdminUser[]> {
+    return firstValueFrom(
+      this.http.get<AdminUser[]>('/api/v1/admin/users', { withCredentials: true }),
+    );
+  }
+}