feat(client): 登录页品牌化 + 授权过期续费入口 + 全平台应用图标统一

- 登录页文案与 Logo 改为「岩美酒库」品牌：标题/副标题/页脚 + 内嵌品牌 mark（替换原酒杯渐变方块）
- 授权过期锁定时，登录页给出续费入口：前往官网续费 + 复制客服邮箱
- 应用图标全平台统一为岩美品牌 mark：macOS(16-1024) / Web(favicon+icons+maskable)
  / Android mipmap(48-192) / iOS AppIcon(20-1024，满底无 alpha 过审核)

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

client/lib/screens/auth/login_screen.dart

@@ -1,6 +1,7 @@
 import 'dart:async';
 
 import 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
 import '../../core/responsive/responsive.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 import 'package:go_router/go_router.dart';
@@ -34,6 +35,16 @@ class _LoginScreenState extends ConsumerState<LoginScreen> {
   bool _obscure = true;
   String? _errorMessage;
 
+  // 客服邮箱（授权续费 / 锁定协助）。与官网 web/_data/site.json 的 support.email 保持一致。
+  static const _supportEmail = 'yammy2023@163.com';
+
+  /// 当前错误是否为「授权锁定」——后端返回固定文案
+  /// `license locked, please renew or contact support`（见 service.ErrLicenseLocked）。
+  bool get _isLicenseLocked {
+    final m = _errorMessage?.toLowerCase() ?? '';
+    return m.contains('license') && (m.contains('lock') || m.contains('expire'));
+  }
+
   List<String> _hotelCodeHistory = [];
   List<String> _usernameHistory = [];
 
@@ -242,6 +253,94 @@ class _LoginScreenState extends ConsumerState<LoginScreen> {
     }
   }
 
+  Future<void> _openRenewSite() async {
+    await launchUrl(
+      Uri.parse(AppConfig.publicBaseUrl),
+      mode: LaunchMode.externalApplication,
+    );
+  }
+
+  Future<void> _copySupportEmail() async {
+    await Clipboard.setData(const ClipboardData(text: _supportEmail));
+    if (!mounted) return;
+    ScaffoldMessenger.of(context).showSnackBar(
+      const SnackBar(content: Text('已复制客服邮箱：$_supportEmail')),
+    );
+  }
+
+  /// 授权锁定时的可操作提示：告诉用户「去哪里解决」——前往官网续费 / 联系客服。
+  Widget _buildLicenseLockedNotice() {
+    return Container(
+      width: double.infinity,
+      padding: const EdgeInsets.all(14),
+      decoration: BoxDecoration(
+        color: AppTheme.danger.withAlpha(15),
+        borderRadius: BorderRadius.circular(6),
+        border: Border.all(color: AppTheme.danger.withAlpha(80)),
+      ),
+      child: Column(
+        crossAxisAlignment: CrossAxisAlignment.start,
+        children: [
+          const Row(
+            children: [
+              Icon(Icons.lock_clock_outlined,
+                  color: AppTheme.danger, size: 18),
+              SizedBox(width: 8),
+              Expanded(
+                child: Text(
+                  '授权已过期，账号已锁定',
+                  style: TextStyle(
+                      color: AppTheme.danger,
+                      fontSize: 14,
+                      fontWeight: FontWeight.w600),
+                ),
+              ),
+            ],
+          ),
+          const SizedBox(height: 6),
+          const Text(
+            '当前门店授权已到期，暂时无法登录。请续费授权后重试，或联系客服协助开通。',
+            style: TextStyle(
+                color: AppTheme.textSecondary, fontSize: 13, height: 1.4),
+          ),
+          const SizedBox(height: 12),
+          Wrap(
+            spacing: 8,
+            runSpacing: 8,
+            children: [
+              ElevatedButton.icon(
+                onPressed: _openRenewSite,
+                icon: const Icon(Icons.open_in_new, size: 16),
+                label: const Text('前往官网续费'),
+                style: ElevatedButton.styleFrom(
+                  backgroundColor: AppTheme.danger,
+                  foregroundColor: Colors.white,
+                  padding: const EdgeInsets.symmetric(
+                      horizontal: 14, vertical: 10),
+                  shape: RoundedRectangleBorder(
+                      borderRadius: BorderRadius.circular(4)),
+                ),
+              ),
+              OutlinedButton.icon(
+                onPressed: _copySupportEmail,
+                icon: const Icon(Icons.support_agent_outlined, size: 16),
+                label: const Text('复制客服邮箱'),
+                style: OutlinedButton.styleFrom(
+                  foregroundColor: AppTheme.danger,
+                  side: BorderSide(color: AppTheme.danger.withAlpha(120)),
+                  padding: const EdgeInsets.symmetric(
+                      horizontal: 14, vertical: 10),
+                  shape: RoundedRectangleBorder(
+                      borderRadius: BorderRadius.circular(4)),
+                ),
+              ),
+            ],
+          ),
+        ],
+      ),
+    );
+  }
+
   @override
   Widget build(BuildContext context) {
     // 被踢下线 / 会话失效：登出后跳回登录页，弹一次提示并清空
@@ -283,20 +382,12 @@ class _LoginScreenState extends ConsumerState<LoginScreen> {
                         child: Column(
                           mainAxisSize: MainAxisSize.min,
                           children: [
-                            // Logo
+                            // Logo（岩美酒库品牌 mark，与 App 图标一致）
                             Container(
                               width: 80,
                               height: 80,
                               decoration: BoxDecoration(
-                                gradient: const LinearGradient(
-                                  colors: [
-                                    AppTheme.primaryLight,
-                                    AppTheme.primaryDark
-                                  ],
-                                  begin: Alignment.topLeft,
-                                  end: Alignment.bottomRight,
-                                ),
-                                borderRadius: BorderRadius.circular(12),
+                                borderRadius: BorderRadius.circular(15),
                                 boxShadow: [
                                   BoxShadow(
                                     color: AppTheme.primary.withAlpha(102),
@@ -305,12 +396,19 @@ class _LoginScreenState extends ConsumerState<LoginScreen> {
                                   ),
                                 ],
                               ),
-                              child: const Icon(Icons.wine_bar,
-                                  color: Colors.white, size: 44),
+                              child: ClipRRect(
+                                borderRadius: BorderRadius.circular(15),
+                                child: Image.asset(
+                                  'assets/brand/logo_mark.png',
+                                  width: 80,
+                                  height: 80,
+                                  fit: BoxFit.cover,
+                                ),
+                              ),
                             ),
                             const SizedBox(height: 20),
                             const Text(
-                              '酒库管理系统',
+                              '岩美酒库',
                               style: TextStyle(
                                 fontSize: 24,
                                 fontWeight: FontWeight.w700,
@@ -320,7 +418,7 @@ class _LoginScreenState extends ConsumerState<LoginScreen> {
                             ),
                             const SizedBox(height: 6),
                             const Text(
-                              '酒店仓库管理解决方案',
+                              '专业酒水仓储 · 进销存一体化管理',
                               style: TextStyle(
                                   fontSize: 13,
                                   color: AppTheme.textSecondary),
@@ -448,32 +546,35 @@ class _LoginScreenState extends ConsumerState<LoginScreen> {
                             // Inline error
                             if (_errorMessage != null) ...[
                               const SizedBox(height: 12),
-                              Container(
-                                width: double.infinity,
-                                padding: const EdgeInsets.symmetric(
-                                    horizontal: 12, vertical: 10),
-                                decoration: BoxDecoration(
-                                  color: AppTheme.danger.withAlpha(15),
-                                  borderRadius: BorderRadius.circular(4),
-                                  border: Border.all(
-                                      color: AppTheme.danger.withAlpha(80)),
-                                ),
-                                child: Row(
-                                  children: [
-                                    const Icon(Icons.error_outline,
-                                        color: AppTheme.danger, size: 16),
-                                    const SizedBox(width: 8),
-                                    Expanded(
-                                      child: Text(
-                                        _errorMessage!,
-                                        style: const TextStyle(
-                                            color: AppTheme.danger,
-                                            fontSize: 13),
+                              if (_isLicenseLocked)
+                                _buildLicenseLockedNotice()
+                              else
+                                Container(
+                                  width: double.infinity,
+                                  padding: const EdgeInsets.symmetric(
+                                      horizontal: 12, vertical: 10),
+                                  decoration: BoxDecoration(
+                                    color: AppTheme.danger.withAlpha(15),
+                                    borderRadius: BorderRadius.circular(4),
+                                    border: Border.all(
+                                        color: AppTheme.danger.withAlpha(80)),
+                                  ),
+                                  child: Row(
+                                    children: [
+                                      const Icon(Icons.error_outline,
+                                          color: AppTheme.danger, size: 16),
+                                      const SizedBox(width: 8),
+                                      Expanded(
+                                        child: Text(
+                                          _errorMessage!,
+                                          style: const TextStyle(
+                                              color: AppTheme.danger,
+                                              fontSize: 13),
+                                        ),
                                       ),
-                                    ),
-                                  ],
+                                    ],
+                                  ),
                                 ),
-                              ),
                             ],
 
                             const SizedBox(height: 24),
@@ -530,7 +631,7 @@ class _LoginScreenState extends ConsumerState<LoginScreen> {
             right: 0,
             child: Center(
               child: Text(
-                '© 2026 酒库管理系统 v1.0.0',
+                '© 2026 岩美酒库 v1.0.0',
                 style: TextStyle(
                     color: Colors.white.withAlpha(102), fontSize: 12),
               ),

client/pubspec.yaml

@@ -44,3 +44,4 @@ flutter:
   assets:
     - assets/fonts/NotoSansSC-Regular.ttf
     - assets/config/app_info.json
+    - assets/brand/logo_mark.png