feat: NCS-63 User account implementation (#2)

User Profile info, no game before login/register, menu bar

---------

Co-authored-by: Lala, Shahd <Shahd.Lala@sybit.de>
Co-authored-by: shahdlala66 <shahd.lala66@gmail.com>
Reviewed-on: #2

src/app/services/auth.interceptor.ts

@@ -0,0 +1,22 @@
+import { HttpInterceptorFn } from '@angular/common/http';
+
+export const authInterceptor: HttpInterceptorFn = (req, next) => {
+  const token = localStorage.getItem('token');
+
+  // Add token to protected endpoints only (not registration or login)
+  const isProtectedEndpoint =
+    req.url.includes('/api/account/me') ||
+    req.url.includes('/api/account/bots') ||
+    req.url.includes('/api/account/official-bots') ||
+    req.url.includes('/api/challenge');
+
+  if (token && isProtectedEndpoint) {
+    req = req.clone({
+      setHeaders: {
+        Authorization: `Bearer ${token}`
+      }
+    });
+  }
+
+  return next(req);
+};