fix(client): iPad(tablet)对齐桌面——侧栏补设置/联系我们 + 顶部避让状态栏

iPad 测试反馈:① 平板侧栏只有 连接/节点/统计,缺「设置」「联系我们」(桌面侧栏有,只能从
「我的」页进);② 顶部 brand/标题与 iOS 状态栏重叠(TabletShell 没包 SafeArea)。

- TabletShell:侧栏补 设置/联系我们 两项 + content 路由到 SettingsPage/ContactPage(对齐
  DesktopShell);整体包 SafeArea(bottom:false)避开状态栏/notch。
- SettingsPage:开机自启是桌面登录项概念,iOS/Android 无此能力 → 仅 desktop 平台显示该行。

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

client/lib/screens/settings_page.dart

@@ -2,6 +2,8 @@
 //
 // 对照 ui_kits/desktop/dapp.jsx DSettings（精简）：兑换入口 + 语言段控 +
 // 深色外观 + 协议 + 版本。开关组（开机自启/智能分流/Kill-switch）待 l10n 补齐后加。
+import 'dart:io';
+
 import 'package:flutter/material.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 
@@ -39,9 +41,10 @@ class SettingsPage extends ConsumerWidget {
                 right: Icon(PangolinIcons.chevronRight, size: 18, color: c.fg3), onTap: () {}),
           ]),
           const SizedBox(height: 16),
-          // 功能开关组
+          // 功能开关组（开机自启是桌面端登录项概念,iOS/Android 无此能力,仅桌面显示）
           _Card(children: [
-            _Row(title: t.autostart, sub: t.autostartSub, right: sw(s.autostart, settings.setAutostart)),
+            if (Platform.isMacOS || Platform.isWindows || Platform.isLinux)
+              _Row(title: t.autostart, sub: t.autostartSub, right: sw(s.autostart, settings.setAutostart)),
             _Row(title: t.autoConnect, sub: t.autoConnectSub, right: sw(s.autoConnect, settings.setAutoConnect)),
             _Row(title: t.smartRoute, sub: t.smartRouteSub, right: sw(s.smartRoute, settings.setSmartRoute)),
             _Row(title: t.killSwitch, sub: t.killSwitchSub, last: true, right: sw(s.killSwitch, settings.setKillSwitch)),

client/lib/shell/tablet_shell.dart

@@ -8,7 +8,9 @@ import 'package:flutter_riverpod/flutter_riverpod.dart';
 import '../pangolin_theme.dart';
 import '../screens/account_page.dart';
 import '../screens/connect_page.dart';
+import '../screens/contact_page.dart';
 import '../screens/nodes_page.dart';
+import '../screens/settings_page.dart';
 import '../screens/stats_page.dart';
 import '../state/app_providers.dart';
 import '../state/navigation_provider.dart';
@@ -25,11 +27,13 @@ class TabletShell extends ConsumerWidget {
     final t = ref.watch(appTextProvider);
     final view = ref.watch(navViewProvider);
 
-    // 「我的」移到侧栏顶部品牌按钮(见 NavSidebar)。
+    // 「我的」移到侧栏顶部品牌按钮(见 NavSidebar);设置/联系我们对齐桌面侧栏。
     final items = <NavSidebarItem>[
       (icon: PangolinIcons.power, label: t.tabConnect, view: NavView.connect),
       (icon: PangolinIcons.globe, label: t.tabServers, view: NavView.servers),
       (icon: PangolinIcons.barChart, label: t.tabStats, view: NavView.stats),
+      (icon: PangolinIcons.settings, label: t.settingsTitle, view: NavView.settings),
+      (icon: PangolinIcons.messageCircle, label: t.contactTitle, view: NavView.contact),
     ];
 
     final titles = <NavView, String>{
@@ -37,6 +41,8 @@ class TabletShell extends ConsumerWidget {
       NavView.servers: t.tabServers,
       NavView.stats: t.tabStats,
       NavView.account: t.tabMe,
+      NavView.settings: t.settingsTitle,
+      NavView.contact: t.contactTitle,
     };
 
     void go(NavView v) => ref.read(navViewProvider.notifier).state = v;
@@ -49,22 +55,31 @@ class TabletShell extends ConsumerWidget {
           return NodesPage(isWide: true, onPicked: () => go(NavView.connect));
         case NavView.stats:
           return const StatsPage(isWide: true);
-        default: // account / contact / settings / plans / redeem → 账户（tablet 一级只 4 项）
+        case NavView.settings:
+          return const SettingsPage();
+        case NavView.contact:
+          return const ContactPage();
+        default: // account / plans / redeem / devices → 账户（其余下钻在账户页内）
           return const AccountPage(isWide: true);
       }
     }
 
     return ColoredBox(
       color: c.bg,
-      child: Row(children: [
-        NavSidebar(items: items, width: 232, dense: false),
-        Expanded(
-          child: Column(children: [
-            ContentTopBar(title: titles[view] ?? t.tabMe, showThemeToggle: false, titleSize: 19),
-            Expanded(child: content()),
-          ]),
-        ),
-      ]),
+      // iPad 上内容会顶到状态栏(时间/电量/notch)。SafeArea 加顶部安全区,避开重叠;
+      // 底部留给页面自行处理(home indicator)。
+      child: SafeArea(
+        bottom: false,
+        child: Row(children: [
+          NavSidebar(items: items, width: 232, dense: false),
+          Expanded(
+            child: Column(children: [
+              ContentTopBar(title: titles[view] ?? t.tabMe, showThemeToggle: false, titleSize: 19),
+              Expanded(child: content()),
+            ]),
+          ),
+        ]),
+      ),
     );
   }
 }