feat(client): 授权管理拆四卡，首月特惠默认选中，关于页备案号加链接

- 授权管理面板拆四张卡：授权到期时间 / 在线购买续费 / 兑换券 / 到期降级规则；
  非管理员在购买卡位显示「联系管理员 + 查看套餐价格」引导
- 购买卡套餐 tab 首月特惠放第一位并默认选中；已享受过特惠则默认高级版年付
- 关于页页脚备案号可点击跳转工信部备案查询

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01JJ1g8XV1YhhmHRzhwWEW7o

client/lib/screens/about/about_screen.dart

@@ -60,9 +60,21 @@ class _AboutScreenState extends ConsumerState<AboutScreen> {
                 // 页脚
                 Padding(
                   padding: const EdgeInsets.only(top: 4, bottom: 12),
-                  child: Text('© 2026 岩美科技 · 保留所有权利 · 京ICP备2026039814号',
-                      textAlign: TextAlign.center,
-                      style: TextStyle(fontSize: AppDims.fsXs, color: t.faint)),
+                  child: Row(
+                    mainAxisAlignment: MainAxisAlignment.center,
+                    children: [
+                      Text('© 2026 岩美科技 · 保留所有权利 · ',
+                          style: TextStyle(
+                              fontSize: AppDims.fsXs, color: t.faint)),
+                      InkWell(
+                        onTap: () =>
+                            launchUrl(Uri.parse('https://beian.miit.gov.cn')),
+                        child: Text('京ICP备2026039814号',
+                            style: TextStyle(
+                                fontSize: AppDims.fsXs, color: t.faint)),
+                      ),
+                    ],
+                  ),
                 ),
               ],
             ),

client/lib/screens/settings/purchase_card.dart

@@ -32,7 +32,7 @@ class PurchaseCard extends ConsumerStatefulWidget {
 
 class _PurchaseCardState extends ConsumerState<PurchaseCard> {
   _Phase _phase = _Phase.pick;
-  int _tabIdx = 0; // 0=标准版 1=首月特惠 2=高级版
+  int _tabIdx = 0; // 0=首月特惠 1=标准版 2=高级版
   int _cycleIdx = 0; // 0=年付 1=月付
   bool _submitting = false;
   bool _checking = false;
@@ -42,9 +42,9 @@ class _PurchaseCardState extends ConsumerState<PurchaseCard> {
   DateTime? _newExpiresAt;
   Timer? _pollTimer;
 
-  bool get _isPromo => _tabIdx == 1;
+  bool get _isPromo => _tabIdx == 0;
   LicensePlanGroup get _group =>
-      _tabIdx == 0 ? LicensePlans.standard : LicensePlans.pro;
+      _tabIdx == 1 ? LicensePlans.standard : LicensePlans.pro;
   LicensePlan get _plan => _isPromo
       ? LicensePlans.promo
       : (_cycleIdx == 0 ? _group.annual : _group.monthly);
@@ -54,7 +54,16 @@ class _PurchaseCardState extends ConsumerState<PurchaseCard> {
   void initState() {
     super.initState();
     ref.read(licenseRepositoryProvider).promoUsed().then((used) {
-      if (mounted && used) setState(() => _promoUsed = true);
+      // 已享受过特惠：置灰并把默认选中切到「高级版 · 年付」
+      if (mounted && used) {
+        setState(() {
+          _promoUsed = true;
+          if (_phase == _Phase.pick && _isPromo) {
+            _tabIdx = 2;
+            _cycleIdx = 0;
+          }
+        });
+      }
     });
   }
 
@@ -149,8 +158,8 @@ class _PurchaseCardState extends ConsumerState<PurchaseCard> {
         Wrap(spacing: 10, runSpacing: 8, children: [
           DsSeg(
             items: [
-              '标准版',
               _promoUsed ? '首月特惠（已享受）' : '🔥 首月特惠 ¥1',
+              '标准版',
               '高级版',
             ],
             index: _tabIdx,

client/lib/screens/settings/settings_screen.dart

@@ -699,127 +699,114 @@ class _LicensePanelState extends ConsumerState<_LicensePanel> {
     return Column(
       crossAxisAlignment: CrossAxisAlignment.stretch,
       children: [
+        // ── 卡1：授权到期时间（原型 .lic 统计条：bg 底 / border / r-md）──
         _SettingsCard(
-          title: '授权管理',
-          desc: '使用兑换券续期，时长在现有到期时间上叠加',
-          child: Column(
-            crossAxisAlignment: CrossAxisAlignment.start,
-            children: [
-              // 原型 .lic 统计条：bg 底 / border / r-md / pad 18 20
+          title: '授权到期时间',
+          desc: '当前门店的授权有效期，续期时长在现有到期时间上叠加',
+          child: Container(
+            padding: const EdgeInsets.fromLTRB(20, 18, 20, 18),
+            decoration: BoxDecoration(
+              color: t.bg,
+              border: Border.all(color: t.border),
+              borderRadius: BorderRadius.circular(AppDims.rMd),
+            ),
+            child: Row(children: [
+              _stat(t, '授权到期日', expires),
+              const SizedBox(width: 24),
+              _stat(t, '剩余天数', days != null ? '剩余 $days 天' : '—', warn: true),
+              const Spacer(),
               Container(
-                padding: const EdgeInsets.fromLTRB(20, 18, 20, 18),
+                width: 46,
+                height: 46,
                 decoration: BoxDecoration(
-                  color: t.bg,
-                  border: Border.all(color: t.border),
+                  color: t.okSoft,
                   borderRadius: BorderRadius.circular(AppDims.rMd),
                 ),
-                child: Row(children: [
-                  _stat(t, '授权到期日', expires),
-                  const SizedBox(width: 24),
-                  _stat(t, '剩余天数', days != null ? '剩余 $days 天' : '—',
-                      warn: true),
-                  const Spacer(),
-                  Container(
-                    width: 46,
-                    height: 46,
-                    decoration: BoxDecoration(
-                      color: t.okSoft,
-                      borderRadius: BorderRadius.circular(AppDims.rMd),
-                    ),
-                    child: Icon(LucideIcons.shieldCheck,
-                        size: 22, color: t.success),
-                  ),
-                ]),
+                child:
+                    Icon(LucideIcons.shieldCheck, size: 22, color: t.success),
               ),
-              const SizedBox(height: 16),
-              // 兑换（原型 .redeem：input + 按钮，max 520）
-              ConstrainedBox(
-                constraints: const BoxConstraints(maxWidth: 520),
-                child: Row(
-                  crossAxisAlignment: CrossAxisAlignment.end,
-                  children: [
-                    Expanded(
-                      child: Column(
-                        crossAxisAlignment: CrossAxisAlignment.start,
-                        children: [
-                          Text('兑换券短码',
-                              style: TextStyle(
-                                  fontSize: AppDims.fsSm, color: t.muted)),
-                          const SizedBox(height: 6),
-                          DsInput(
-                            controller: _voucherCtrl,
-                            hintText: '输入兑换券短码',
-                          ),
-                        ],
-                      ),
-                    ),
-                    const SizedBox(width: 10),
-                    WriteGuard(
-                      child: DsButton(_redeeming ? '兑换中…' : '兑换续期',
-                          variant: DsBtnVariant.primary,
-                          onPressed: _redeeming ? null : _redeem),
-                    ),
-                  ],
-                ),
-              ),
-              // 在线购买仅管理员（后端 purchase 接口 admin only，主 CTA 已上移到统计条）；
-              // 其他角色引导看官网价格页
-              if (!isAdmin) ...[
-                const SizedBox(height: 14),
-                Row(children: [
-                  Text('在线购买请联系门店管理员 · ',
-                      style: TextStyle(fontSize: AppDims.fsSm, color: t.muted)),
-                  InkWell(
-                    onTap: () =>
-                        launchUrl(Uri.parse('${AppInfo.website}/#pricing')),
-                    child: Text('查看套餐价格 →',
-                        style: TextStyle(
-                            fontSize: AppDims.fsSm,
-                            fontWeight: FontWeight.w600,
-                            color: t.primary)),
-                  ),
-                ]),
-              ],
-              const SizedBox(height: 16),
-              // 过期降级说明（现有能力保留）
-              Container(
-                padding: const EdgeInsets.all(14),
-                decoration: BoxDecoration(
-                  color: t.bg,
-                  border: Border.all(color: t.borderSubtle),
-                  borderRadius: BorderRadius.circular(AppDims.rMd),
-                ),
-                child: Column(
-                  crossAxisAlignment: CrossAxisAlignment.start,
-                  children: [
-                    Text('到期后的降级规则',
-                        style: TextStyle(
-                            fontSize: AppDims.fsSm,
-                            fontWeight: FontWeight.w600,
-                            color: t.heading)),
-                    const SizedBox(height: 6),
-                    for (final note in LicenseCopy.degradationNotes())
-                      Padding(
-                        padding: const EdgeInsets.only(top: 3),
-                        child: Text('· $note',
-                            style: TextStyle(
-                                fontSize: AppDims.fsSm, color: t.muted)),
-                      ),
-                  ],
-                ),
-              ),
-            ],
+            ]),
           ),
         ),
-        // 在线购买仅管理员（后端 purchase 接口 admin only），单独一张卡内联展示
-        if (isAdmin) ...[
-          const SizedBox(height: 16),
+        const SizedBox(height: 16),
+        // ── 卡2：在线购买 / 续费（后端 purchase 接口 admin only，
+        //    非管理员引导看官网价格页）──
+        if (isAdmin)
           const _SettingsCard(
             title: '在线购买 / 续费',
             desc: '选择套餐支付宝支付，到账后授权自动续期',
             child: PurchaseCard(),
+          )
+        else
+          _SettingsCard(
+            title: '在线购买 / 续费',
+            desc: '在线购买仅门店管理员可操作',
+            child: Row(children: [
+              Text('在线购买请联系门店管理员 · ',
+                  style: TextStyle(fontSize: AppDims.fsSm, color: t.muted)),
+              InkWell(
+                onTap: () =>
+                    launchUrl(Uri.parse('${AppInfo.website}/#pricing')),
+                child: Text('查看套餐价格 →',
+                    style: TextStyle(
+                        fontSize: AppDims.fsSm,
+                        fontWeight: FontWeight.w600,
+                        color: t.primary)),
+              ),
+            ]),
           ),
-        ],
+        const SizedBox(height: 16),
+        // ── 卡3：兑换券（原型 .redeem：input + 按钮，max 520）──
+        _SettingsCard(
+          title: '兑换券',
+          desc: '输入兑换券短码续期',
+          child: ConstrainedBox(
+            constraints: const BoxConstraints(maxWidth: 520),
+            child: Row(
+              crossAxisAlignment: CrossAxisAlignment.end,
+              children: [
+                Expanded(
+                  child: Column(
+                    crossAxisAlignment: CrossAxisAlignment.start,
+                    children: [
+                      Text('兑换券短码',
+                          style: TextStyle(
+                              fontSize: AppDims.fsSm, color: t.muted)),
+                      const SizedBox(height: 6),
+                      DsInput(
+                        controller: _voucherCtrl,
+                        hintText: '输入兑换券短码',
+                      ),
+                    ],
+                  ),
+                ),
+                const SizedBox(width: 10),
+                WriteGuard(
+                  child: DsButton(_redeeming ? '兑换中…' : '兑换续期',
+                      variant: DsBtnVariant.primary,
+                      onPressed: _redeeming ? null : _redeem),
+                ),
+              ],
+            ),
+          ),
+        ),
+        const SizedBox(height: 16),
+        // ── 卡4：到期后的降级规则（现有能力保留）──
+        _SettingsCard(
+          title: '到期后的降级规则',
+          desc: '授权到期后系统各功能的可用性说明',
+          child: Column(
+            crossAxisAlignment: CrossAxisAlignment.start,
+            children: [
+              for (final note in LicenseCopy.degradationNotes())
+                Padding(
+                  padding: const EdgeInsets.only(top: 3),
+                  child: Text('· $note',
+                      style: TextStyle(fontSize: AppDims.fsSm, color: t.muted)),
+                ),
+            ],
+          ),
+        ),
       ],
     );
   }