Admin UI: Encountering infinite loading when accessing pages while lo…

…gged out (#842)

* fix: make redirect to login screen when not authenticated

* fix; navigate to correct page after login

* fix: simplify navigate and change default to login

* chore: remove method and add redirect when user is authenticated

* fix: make it an arrow function

* fix: make an early return

* chore: remove unnecessary return keyword

Applications/AdminUi/apps/admin_ui/lib/screens/splash_screen.dart

@@ -45,23 +45,22 @@ class _SplashScreenState extends State<SplashScreen> {
     await GetIt.I.allReady();
     final sp = await SharedPreferences.getInstance();
 
-    if (!sp.containsKey('api_key')) return _navigate('/login');
+    if (!sp.containsKey('api_key')) return _navigateToLogin();
 
     final apiKey = sp.getString('api_key')!;
     const baseUrl = kIsWeb ? '' : String.fromEnvironment('base_url');
 
     final isValid = await AdminApiClient.validateApiKey(baseUrl: baseUrl, apiKey: apiKey);
-    if (!isValid) return _navigate('/login');
+    if (!isValid) return _navigateToLogin();
 
     GetIt.I.registerSingleton(await AdminApiClient.create(baseUrl: baseUrl, apiKey: apiKey));
-    return _navigate('/identities');
-  }
 
-  void _navigate(String defaultRoute) {
     if (!mounted) return;
 
     if (widget.redirect != null) return context.go(Uri.decodeComponent(widget.redirect!));
 
-    context.go(defaultRoute);
+    context.go('/identities');
   }
+
+  void _navigateToLogin() => context.go(widget.redirect != null ? '/login?redirect=${widget.redirect!}' : '/login');
 }