feat: 添加视觉设计语言系统并重构认证页面UI

- 新增 visual_design_language.md 设计规范文档
- 新增 auth 设计 tokens (authBackground, authCard, authInput, feedback 系列等)
- 重构登录/注册/验证码/重置密码页面为新设计系统
- 新增 AuthHeroHeader, AuthSurfaceCard, AuthSection, AuthField, PasswordField 组件
- 重构 AppBanner 和 Toast 支持多类型配置 (info/success/warning/error)
- 后端 AgentScope: 重整 schemas/prompts/tools 作用域, 新增协议文档
- 更新 AGENTS.md 集成视觉设计语言约束

apps/lib/main.dart

@@ -1,50 +1,61 @@
+import 'dart:async';
+
 import 'package:flutter/material.dart';
 import 'package:flutter_bloc/flutter_bloc.dart';
-import 'core/config/env.dart';
+
 import 'core/di/injection.dart';
-import 'core/router/app_router.dart';
-import 'core/theme/app_theme.dart';
 import 'core/notifications/local_notification_service.dart';
+import 'core/router/app_router.dart';
+import 'core/startup/auth_session_bootstrapper.dart';
+import 'core/theme/app_theme.dart';
 import 'features/auth/presentation/bloc/auth_bloc.dart';
 import 'features/auth/presentation/bloc/auth_event.dart';
+import 'features/auth/presentation/bloc/auth_state.dart';
 import 'features/calendar/data/services/calendar_service.dart';
 
 void main() async {
   WidgetsFlutterBinding.ensureInitialized();
   await configureDependencies();
 
-  final notificationService = sl<LocalNotificationService>();
-  await notificationService.initialize();
-
   final authBloc = sl<AuthBloc>();
   authBloc.add(AuthStarted());
 
-  try {
-    final now = DateTime.now();
-    final end = now.add(const Duration(days: 90));
-    final events = await sl<CalendarService>().getEventsForRange(now, end);
-    await notificationService.rebuildUpcomingReminders(events);
-  } catch (_) {
-    // ignore startup sync failures
-  }
-
-  runApp(LinksyApp(authBloc: authBloc));
+  runApp(
+    LinksyApp(
+      authBloc: authBloc,
+      sessionBootstrapper: AuthSessionBootstrapper(
+        calendarService: sl<CalendarService>(),
+        notificationService: sl<LocalNotificationService>(),
+      ),
+    ),
+  );
 }
 
 class LinksyApp extends StatelessWidget {
   final AuthBloc authBloc;
+  final AuthSessionBootstrapper sessionBootstrapper;
 
-  const LinksyApp({super.key, required this.authBloc});
+  const LinksyApp({
+    super.key,
+    required this.authBloc,
+    required this.sessionBootstrapper,
+  });
 
   @override
   Widget build(BuildContext context) {
     return BlocProvider<AuthBloc>.value(
       value: authBloc,
-      child: MaterialApp.router(
-        title: 'Linksy',
-        debugShowCheckedModeBanner: false,
-        theme: AppTheme.light,
-        routerConfig: createAppRouter(authBloc),
+      child: BlocListener<AuthBloc, AuthState>(
+        listenWhen: (previous, current) => previous != current,
+        listener: (context, state) {
+          unawaited(sessionBootstrapper.syncForAuthState(state));
+        },
+        child: MaterialApp.router(
+          title: 'Linksy',
+          debugShowCheckedModeBanner: false,
+          theme: AppTheme.light,
+          routerConfig: createAppRouter(authBloc),
+        ),
       ),
     );
   }