feat: 实现 Auth 全局状态机与 401 统一处理机制

- 新增 AuthSessionInvalidated 事件处理 token 失效场景
- ApiInterceptor 新增 authFailureCallback 单飞机制
- AuthBloc 区分 manual logout 与 auto expiry 语义
- 新增 startup recovery fallback 防止启动卡死

feat: 重构 Calendar DayWeek 视图事件布局引擎

- 新增 DayEventLayoutEngine 解耦事件计算与渲染
- 新增 DayTimelineMetrics 统一时间轴常量
- 新增 DayViewScale 支持捏合缩放

feat: 新增 Settings 页面共享 UI 组件

- 新增 BackTitlePageHeader 统一页面 header
- 新增 DetailHeaderActionMenu 统一操作菜单
- 新增 DestructiveActionSheet 统一删除确认
- 新增 AppToggleSwitch 统一开关组件

feat: Chat UI Schema 支持导航操作

- 支持 navigation 类型 action 触发内部路由跳转
- 新增路径验证与参数处理

chore: 更新相关测试覆盖 auth 失效路径

apps/lib/features/settings/ui/screens/features_screen.dart

@@ -1,6 +1,8 @@
 import 'package:flutter/material.dart';
+import 'package:go_router/go_router.dart';
 import '../../../../core/theme/design_tokens.dart';
-import '../../../../shared/widgets/page_header.dart' as widgets;
+import '../../../../shared/widgets/app_toggle_switch.dart';
+import '../widgets/settings_page_scaffold.dart';
 
 class FeaturesScreen extends StatefulWidget {
   const FeaturesScreen({super.key});
@@ -17,31 +19,20 @@ class _FeaturesScreenState extends State<FeaturesScreen> {
 
   @override
   Widget build(BuildContext context) {
-    return Scaffold(
-      backgroundColor: AppColors.surfaceSecondary,
-      body: SafeArea(
-        child: Column(
-          children: [
-            const widgets.PageHeader(leading: widgets.BackButton()),
-            Expanded(
-              child: SingleChildScrollView(
-                padding: const EdgeInsets.fromLTRB(20, 8, 20, 20),
-                child: Column(
-                  crossAxisAlignment: CrossAxisAlignment.start,
-                  children: [
-                    _buildSectionTitle('每日'),
-                    const SizedBox(height: 8),
-                    _buildDailyList(),
-                    const SizedBox(height: 16),
-                    _buildSectionTitle('每周'),
-                    const SizedBox(height: 8),
-                    _buildWeeklyList(),
-                  ],
-                ),
-              ),
-            ),
-          ],
-        ),
+    return SettingsPageScaffold(
+      title: '周期计划',
+      onBack: () => context.pop(),
+      body: Column(
+        crossAxisAlignment: CrossAxisAlignment.start,
+        children: [
+          _buildSectionTitle('每日'),
+          const SizedBox(height: 8),
+          _buildDailyList(),
+          const SizedBox(height: 16),
+          _buildSectionTitle('每周'),
+          const SizedBox(height: 8),
+          _buildWeeklyList(),
+        ],
       ),
     );
   }
@@ -59,6 +50,7 @@ class _FeaturesScreenState extends State<FeaturesScreen> {
 
   Widget _buildDailyList() {
     return Column(
+      crossAxisAlignment: CrossAxisAlignment.stretch,
       children: [
         _buildFeatureCard(
           icon: Icons.alarm,
@@ -87,6 +79,7 @@ class _FeaturesScreenState extends State<FeaturesScreen> {
 
   Widget _buildWeeklyList() {
     return Column(
+      crossAxisAlignment: CrossAxisAlignment.stretch,
       children: [
         _buildFeatureCard(
           icon: Icons.calendar_view_week,
@@ -128,9 +121,10 @@ class _FeaturesScreenState extends State<FeaturesScreen> {
       decoration: BoxDecoration(
         color: AppColors.white,
         borderRadius: BorderRadius.circular(16),
-        border: Border.all(color: const Color(0xFFE4ECF6)),
+        border: Border.all(color: AppColors.borderSecondary),
       ),
       child: Row(
+        crossAxisAlignment: CrossAxisAlignment.center,
         children: [
           Container(
             width: 40,
@@ -167,40 +161,9 @@ class _FeaturesScreenState extends State<FeaturesScreen> {
               ],
             ),
           ),
-          _buildToggle(value, onChanged),
+          AppToggleSwitch(value: value, onChanged: onChanged),
         ],
       ),
     );
   }
-
-  Widget _buildToggle(bool value, ValueChanged<bool> onChanged) {
-    return GestureDetector(
-      onTap: () => onChanged(!value),
-      child: Container(
-        width: 44,
-        height: 24,
-        padding: const EdgeInsets.all(2),
-        decoration: BoxDecoration(
-          color: value ? const Color(0xFFBFDBFE) : const Color(0xFFF1F5FC),
-          borderRadius: BorderRadius.circular(12),
-          border: Border.all(
-            color: value ? const Color(0xFF93C5FD) : const Color(0xFFD5DFEE),
-          ),
-        ),
-        child: AnimatedAlign(
-          duration: const Duration(milliseconds: 150),
-          alignment: value ? Alignment.centerRight : Alignment.centerLeft,
-          child: Container(
-            width: 20,
-            height: 20,
-            decoration: BoxDecoration(
-              color: AppColors.white,
-              borderRadius: BorderRadius.circular(10),
-              border: Border.all(color: const Color(0xFFCCDDF8)),
-            ),
-          ),
-        ),
-      ),
-    );
-  }
 }