feat(client): iOS 上架合规——首启隐私同意弹窗 + 注销账号入口

个保法/审核 5.1.1：移动端首启全屏隐私同意（链接隐私政策/用户协议，
同意持久化；不同意 Android 退出、iOS 留提示）；我的页 iOS 形态新增
「注销账号」（sheet 说明 + 预填 mailto 至 support@51yanmei.com）。
关于页隐私政策/服务条款链接已有，桌面/Web 零改动。

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

client/lib/screens/me/me_screen.dart

@@ -7,8 +7,10 @@ import 'package:flutter/material.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 import 'package:go_router/go_router.dart';
 import 'package:lucide_icons_flutter/lucide_icons.dart';
+import 'package:url_launcher/url_launcher.dart';
 
 import '../../core/auth/auth_state.dart';
+import '../../core/config/store_compliance.dart';
 import '../../core/theme/app_dims.g.dart';
 import '../../core/theme/context_tokens.dart';
 import '../../providers/shop_provider.dart';
@@ -86,6 +88,12 @@ class MeScreen extends ConsumerWidget {
                 icon: LucideIcons.info,
                 label: '关于我们',
                 onTap: () => context.go('/about')),
+            // iOS App Store 审核 5.1.1(v)：应用内须可发起账号删除
+            if (isIosAppStoreBuild)
+              MHubItem(
+                  icon: LucideIcons.userX,
+                  label: '注销账号',
+                  onTap: () => _showDeleteAccountSheet(context, user)),
           ]),
           const SizedBox(height: 18),
           _LogoutButton(onConfirm: () {
@@ -151,6 +159,65 @@ class MeScreen extends ConsumerWidget {
       ]),
     );
   }
+
+  /// 注销账号（iOS App Store 审核 5.1.1(v)）：应用内发起 → 邮件人工核验。
+  /// 措辞保持中性，不涉及任何购买/续费引导。
+  void _showDeleteAccountSheet(BuildContext context, AuthUser? user) {
+    showMSheet<void>(
+      context,
+      title: '注销账号',
+      builder: (ctx) {
+        final t = ctx.tokens;
+        Widget note(String s) => Padding(
+              padding: const EdgeInsets.only(top: 4),
+              child: Text('· $s',
+                  style: TextStyle(
+                      fontSize: AppDims.fsSm, color: t.muted, height: 1.6)),
+            );
+        final who = user != null ? '${user.shopNo} · ${user.username}' : '';
+        return Padding(
+          padding: const EdgeInsets.fromLTRB(16, 4, 16, 20),
+          child: Column(
+            mainAxisSize: MainAxisSize.min,
+            crossAxisAlignment: CrossAxisAlignment.start,
+            children: [
+              Text('注销将删除您的登录账号，操作不可恢复。',
+                  style: TextStyle(
+                      fontSize: AppDims.fsBody,
+                      fontWeight: FontWeight.w600,
+                      color: t.heading)),
+              const SizedBox(height: 8),
+              note('账号与登录凭据将被删除，无法找回'),
+              note('门店经营数据归属门店：门店内仍有其他用户时数据保留，'
+                  '需整店删除请在申请中说明'),
+              note('为防止误操作与冒用，注销需人工核验身份，'
+                  '我们将在收到申请后 15 个工作日内完成处理'),
+              const SizedBox(height: 16),
+              SizedBox(
+                width: double.infinity,
+                child: DsButton('发送注销申请邮件',
+                    variant: DsBtnVariant.primary,
+                    onPressed: () {
+                      final subject = Uri.encodeComponent('账号注销申请（$who）');
+                      final body = Uri.encodeComponent(
+                          '申请注销账号：$who\n注销原因（选填）：\n\n'
+                          '请使用注册时预留的联系方式发送本邮件以便核验。');
+                      launchUrl(Uri.parse(
+                          'mailto:$supportEmail?subject=$subject&body=$body'));
+                    }),
+              ),
+              const SizedBox(height: 8),
+              Center(
+                child: Text('客服邮箱 $supportEmail',
+                    style:
+                        TextStyle(fontSize: AppDims.fsXs, color: t.faint)),
+              ),
+            ],
+          ),
+        );
+      },
+    );
+  }
 }
 
 class _LogoutButton extends StatelessWidget {