feat(mining-app): 接入 capabilitiesProvider 实现 UI 层能力适配

Phase 5 补充：在 mining-app Flutter 前端关键页面接入 capability 检查，
被禁用的功能按钮置灰并显示 SnackBar 提示，后端 403 拦截作为兜底。

修改的页面及对应能力：
- send_shares_page: P2P_SEND → "确认发送"按钮
- receive_shares_page: P2P_RECEIVE → 顶部限制提示横幅
- c2c_market_page: C2C → "发布"按钮 + "接单"弹窗入口
- c2c_publish_page: C2C → "发布买入/卖出"按钮
- trading_page: TRADING → "确认交易"按钮
- edit_profile_page: PROFILE_EDIT → "保存"操作
- team_page: VIEW_TEAM → 页面数据加载前检查

设计原则：
- 不阻断页面浏览，只阻断操作
- fail-open: 能力获取失败时默认全部开启
- 禁用时点击按钮弹出 SnackBar 提示"您的XX功能已被限制"
- 沿用现有 disabled 按钮样式（.withOpacity(0.4)）

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

frontend/mining-app/lib/presentation/pages/asset/receive_shares_page.dart

@@ -5,6 +5,7 @@ import 'package:go_router/go_router.dart';
 import 'package:qr_flutter/qr_flutter.dart';
 import '../../../core/router/routes.dart';
 import '../../providers/user_providers.dart';
+import '../../../data/models/capability_model.dart';
 
 class ReceiveSharesPage extends ConsumerWidget {
   const ReceiveSharesPage({super.key});
@@ -20,6 +21,8 @@ class ReceiveSharesPage extends ConsumerWidget {
     final user = ref.watch(userNotifierProvider);
     final phone = user.phone ?? '';
     final nickname = user.nickname ?? user.realName ?? '股行用户';
+    final capabilities = ref.watch(capabilitiesProvider).valueOrNull ?? CapabilityMap.defaultAll();
+    final p2pReceiveEnabled = capabilities.p2pReceiveEnabled;
 
     return Scaffold(
       backgroundColor: _bgGray,
@@ -57,6 +60,27 @@ class ReceiveSharesPage extends ConsumerWidget {
       body: SingleChildScrollView(
         child: Column(
           children: [
+            if (!p2pReceiveEnabled)
+              Container(
+                margin: const EdgeInsets.fromLTRB(16, 16, 16, 0),
+                padding: const EdgeInsets.all(12),
+                decoration: BoxDecoration(
+                  color: const Color(0xFFEF4444).withOpacity(0.1),
+                  borderRadius: BorderRadius.circular(8),
+                ),
+                child: const Row(
+                  children: [
+                    Icon(Icons.block, color: Color(0xFFEF4444), size: 20),
+                    SizedBox(width: 8),
+                    Expanded(
+                      child: Text(
+                        '您的P2P收款功能已被限制，当前无法接收转账',
+                        style: TextStyle(fontSize: 13, color: Color(0xFFEF4444)),
+                      ),
+                    ),
+                  ],
+                ),
+              ),
             const SizedBox(height: 32),
 
             // 二维码卡片

frontend/mining-app/lib/presentation/pages/asset/send_shares_page.dart

@@ -8,6 +8,7 @@ import '../../providers/user_providers.dart';
 import '../../providers/asset_providers.dart';
 import '../../providers/transfer_providers.dart';
 import '../../widgets/qr_scanner_sheet.dart';
+import '../../../data/models/capability_model.dart';
 
 class SendSharesPage extends ConsumerStatefulWidget {
   const SendSharesPage({super.key});
@@ -482,7 +483,10 @@ class _SendSharesPageState extends ConsumerState<SendSharesPage> {
     final amount = double.tryParse(_amountController.text) ?? 0;
     final available = double.tryParse(availableCash) ?? 0;
     final totalRequired = amount + feeAmount;
-    final isValid = _isRecipientVerified &&
+    final capabilities = ref.watch(capabilitiesProvider).valueOrNull ?? CapabilityMap.defaultAll();
+    final p2pSendEnabled = capabilities.p2pSendEnabled;
+    final isValid = p2pSendEnabled &&
+        _isRecipientVerified &&
         amount >= minTransferAmount &&
         totalRequired <= available;
 
@@ -494,7 +498,11 @@ class _SendSharesPageState extends ConsumerState<SendSharesPage> {
         child: ElevatedButton(
           onPressed: isValid && !transferState.isLoading
               ? () => _handleTransfer(feeAmount)
-              : null,
+              : !p2pSendEnabled
+                  ? () => ScaffoldMessenger.of(context).showSnackBar(
+                        const SnackBar(content: Text('您的P2P转出功能已被限制'), backgroundColor: _red),
+                      )
+                  : null,
           style: ElevatedButton.styleFrom(
             backgroundColor: _orange,
             foregroundColor: Colors.white,

frontend/mining-app/lib/presentation/pages/c2c/c2c_market_page.dart

@@ -8,6 +8,7 @@ import '../../../data/models/c2c_order_model.dart';
 import '../../providers/c2c_providers.dart';
 import '../../providers/user_providers.dart';
 import '../../providers/asset_providers.dart';
+import '../../../data/models/capability_model.dart';
 
 class C2cMarketPage extends ConsumerStatefulWidget {
   const C2cMarketPage({super.key});
@@ -73,7 +74,16 @@ class _C2cMarketPageState extends ConsumerState<C2cMarketPage>
         actions: [
           IconButton(
             icon: const Icon(Icons.add_circle_outline, color: _orange),
-            onPressed: () => context.push(Routes.c2cPublish),
+            onPressed: () {
+              final caps = ref.read(capabilitiesProvider).valueOrNull ?? CapabilityMap.defaultAll();
+              if (!caps.c2cEnabled) {
+                ScaffoldMessenger.of(context).showSnackBar(
+                  const SnackBar(content: Text('您的C2C交易功能已被限制'), backgroundColor: _red),
+                );
+                return;
+              }
+              context.push(Routes.c2cPublish);
+            },
           ),
         ],
         bottom: TabBar(
@@ -614,6 +624,13 @@ class _C2cMarketPageState extends ConsumerState<C2cMarketPage>
 
   // #13 + #15: 接单对话框（支持部分成交数量输入 + BUY单收款信息输入）
   void _showTakeOrderDialog(C2cOrderModel order, bool isBuyAction) {
+    final caps = ref.read(capabilitiesProvider).valueOrNull ?? CapabilityMap.defaultAll();
+    if (!caps.c2cEnabled) {
+      ScaffoldMessenger.of(context).showSnackBar(
+        const SnackBar(content: Text('您的C2C交易功能已被限制'), backgroundColor: _red),
+      );
+      return;
+    }
     final quantityController = TextEditingController(text: order.quantity);
     final paymentAccountController = TextEditingController();
     final paymentRealNameController = TextEditingController();

frontend/mining-app/lib/presentation/pages/c2c/c2c_publish_page.dart

@@ -7,6 +7,7 @@ import '../../providers/c2c_providers.dart';
 import '../../providers/user_providers.dart';
 import '../../providers/asset_providers.dart';
 import '../../providers/trading_providers.dart';
+import '../../../data/models/capability_model.dart';
 
 class C2cPublishPage extends ConsumerStatefulWidget {
   const C2cPublishPage({super.key});
@@ -708,9 +709,11 @@ class _C2cPublishPageState extends ConsumerState<C2cPublishPage> {
   Widget _buildPublishButton(C2cTradingState c2cState) {
     final quantity = double.tryParse(_quantityController.text) ?? 0;
     final isSell = _selectedType == 1;
+    final capabilities = ref.watch(capabilitiesProvider).valueOrNull ?? CapabilityMap.defaultAll();
+    final c2cEnabled = capabilities.c2cEnabled;
 
     // #11: 价格固定为1，数量最小为1
-    bool isValid = quantity >= 1;
+    bool isValid = c2cEnabled && quantity >= 1;
     if (isSell) {
       // 如果选择了其他支付方式，还需要填写收款账号和姓名
       if (_selectedPaymentMethods.any((m) => m != 'GREEN_POINTS')) {
@@ -726,7 +729,13 @@ class _C2cPublishPageState extends ConsumerState<C2cPublishPage> {
         width: double.infinity,
         height: 50,
         child: ElevatedButton(
-          onPressed: isValid && !c2cState.isLoading ? _handlePublish : null,
+          onPressed: isValid && !c2cState.isLoading
+              ? _handlePublish
+              : !c2cEnabled
+                  ? () => ScaffoldMessenger.of(context).showSnackBar(
+                        const SnackBar(content: Text('您的C2C交易功能已被限制'), backgroundColor: _red),
+                      )
+                  : null,
           style: ElevatedButton.styleFrom(
             backgroundColor: _selectedType == 0 ? _green : _red,
             foregroundColor: Colors.white,

frontend/mining-app/lib/presentation/pages/profile/edit_profile_page.dart

@@ -2,6 +2,7 @@ import 'package:flutter/material.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 import 'package:go_router/go_router.dart';
 import '../../providers/user_providers.dart';
+import '../../../data/models/capability_model.dart';
 
 class EditProfilePage extends ConsumerStatefulWidget {
   const EditProfilePage({super.key});
@@ -336,6 +337,17 @@ class _EditProfilePageState extends ConsumerState<EditProfilePage> {
   }
 
   Future<void> _saveProfile() async {
+    final capabilities = ref.read(capabilitiesProvider).valueOrNull ?? CapabilityMap.defaultAll();
+    if (!capabilities.profileEditEnabled) {
+      ScaffoldMessenger.of(context).showSnackBar(
+        const SnackBar(
+          content: Text('您的编辑资料功能已被限制'),
+          backgroundColor: Color(0xFFEF4444),
+        ),
+      );
+      return;
+    }
+
     setState(() {
       _isLoading = true;
     });

frontend/mining-app/lib/presentation/pages/profile/team_page.dart

@@ -5,6 +5,7 @@ import '../../../data/datasources/remote/referral_remote_datasource.dart';
 import '../../widgets/team_tree_widget.dart';
 import '../../providers/user_providers.dart';
 import '../../providers/profile_providers.dart';
+import '../../../data/models/capability_model.dart';
 
 class TeamPage extends ConsumerStatefulWidget {
   const TeamPage({super.key});
@@ -31,6 +32,15 @@ class _TeamPageState extends ConsumerState<TeamPage> {
   }
 
   Future<void> _loadRootNode() async {
+    final capabilities = ref.read(capabilitiesProvider).valueOrNull ?? CapabilityMap.defaultAll();
+    if (!capabilities.viewTeamEnabled) {
+      setState(() {
+        _isLoading = false;
+        _error = '您的查看团队功能已被限制';
+      });
+      return;
+    }
+
     final user = ref.read(userNotifierProvider);
     final stats = ref.read(userStatsProvider).valueOrNull;
 

frontend/mining-app/lib/presentation/pages/trading/trading_page.dart

@@ -17,6 +17,7 @@ import '../../providers/asset_providers.dart';
 import '../../widgets/shimmer_loading.dart';
 import '../../widgets/kline_chart/kline_chart_widget.dart';
 import '../../widgets/trade_password_dialog.dart';
+import '../../../data/models/capability_model.dart';
 
 class TradingPage extends ConsumerStatefulWidget {
   const TradingPage({super.key});
@@ -805,15 +806,23 @@ class _TradingPageState extends ConsumerState<TradingPage> {
                 ),
               ),
             const SizedBox(height: 24),
-            // 提交按钮（卖出时校验积分股余额）
+            // 提交按钮（卖出时校验积分股余额 + 能力检查）
             Builder(builder: (context) {
               final sellError = _selectedTab == 1 ? _getSellValidationError(tradingShareBalance) : null;
-              final isDisabled = sellError != null;
+              final capabilities = ref.watch(capabilitiesProvider).valueOrNull ?? CapabilityMap.defaultAll();
+              final tradingEnabled = capabilities.tradingEnabled;
+              final isDisabled = sellError != null || !tradingEnabled;
               return SizedBox(
               width: double.infinity,
               height: 48,
               child: ElevatedButton(
-                onPressed: isDisabled ? null : _handleTrade,
+                onPressed: isDisabled
+                    ? !tradingEnabled
+                        ? () => ScaffoldMessenger.of(context).showSnackBar(
+                              const SnackBar(content: Text('您的交易功能已被限制'), backgroundColor: AppColors.down),
+                            )
+                        : null
+                    : _handleTrade,
                 style: ElevatedButton.styleFrom(
                   backgroundColor: isDisabled ? Colors.grey : _orange,
                   shape: RoundedRectangleBorder(