refactor: 重构 schemas 结构，统一枚举定义

apps/lib/features/auth/ui/screens/auth_boot_screen.dart

@@ -1,23 +1,17 @@
 import 'package:flutter/material.dart';
 
-import '../../../../core/theme/design_tokens.dart';
-import '../../../../shared/widgets/app_loading_indicator.dart';
-
 class AuthBootScreen extends StatelessWidget {
   const AuthBootScreen({super.key});
 
   @override
   Widget build(BuildContext context) {
-    return const Scaffold(
-      backgroundColor: AppColors.authBackgroundTop,
+    return Scaffold(
+      backgroundColor: const Color(0xFFEFF8FF),
       body: SafeArea(
         child: Center(
-          child: AppLoadingIndicator(
-            variant: AppLoadingVariant.surface,
-            size: 28,
-            strokeWidth: 2.5,
-            color: AppColors.authPrimaryButton,
-            trackColor: AppColors.authPrimaryButtonDisabled,
+          child: Image.asset(
+            'assets/branding/assistant_octopus_foreground.png',
+            width: 260,
           ),
         ),
       ),