refactor: 交易页面改为券+行业分类模式，移除交易对tabs

- market_page: 移除券/法币/数字货币/稳定币tabs，改为行业分类过滤(餐饮/购物/娱乐/出行/生活/运动)
- market_page: 新增排序栏(折扣率/价格/到期时间)，二级市场改为券名+品牌+行业标签展示
- trading_detail_page: 移除SBUX/USDT交易对概念，改为券信息卡片+配置货币符号
- trading_detail_page: 新增券信息卡片(品牌/行业/信用评级/面值/到期)，价格显示折扣率
- 计价货币由用户在"我的→设置"中配置，默认跟随语言

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

frontend/genex-mobile/lib/features/coupons/presentation/pages/market_page.dart

@@ -5,8 +5,9 @@ import '../../../../app/theme/app_spacing.dart';
 
 /// 交易 - 币安风格交易所
 ///
-/// 一级市场（打新申购）/ 二级市场（交易所）
+/// 一级市场（打新申购）/ 二级市场（交易所行情）
-/// 支持交易对：券/法币、券/数字货币、券/稳定币
+/// 行业分类过滤 + 排序 + 券列表
+/// 计价货币由用户在"我的→设置"中配置，默认跟随语言(中文=¥，英文=$)
 class MarketPage extends StatefulWidget {
   const MarketPage({super.key});
 
@@ -17,7 +18,8 @@ class MarketPage extends StatefulWidget {
 class _MarketPageState extends State<MarketPage>
     with SingleTickerProviderStateMixin {
   late TabController _marketTabController;
-  int _pairTypeIndex = 0; // 0=券/法币, 1=券/数字货币, 2=券/稳定币, 3=收藏
+  String? _selectedCategory; // null = 全部
+  int _sortIndex = 0; // 0=折扣率, 1=价格↑, 2=价格↓, 3=到期时间
 
   @override
   void initState() {
@@ -69,13 +71,104 @@ class _MarketPageState extends State<MarketPage>
           ),
         ),
       ),
-      body: TabBarView(
+      body: Column(
+        children: [
+          const SizedBox(height: 12),
+          // 行业分类过滤
+          _buildCategoryFilter(),
+          const SizedBox(height: 8),
+          // 排序栏
+          _buildSortBar(),
+          const Divider(height: 1),
+          // 内容
+          Expanded(
+            child: TabBarView(
               controller: _marketTabController,
               children: [
                 _buildPrimaryMarket(),
                 _buildSecondaryMarket(),
               ],
             ),
+          ),
+        ],
+      ),
+    );
+  }
+
+  // ============================================================
+  // 行业分类过滤
+  // ============================================================
+  Widget _buildCategoryFilter() {
+    final categories = [
+      (null, '全部'),
+      ('dining', '餐饮'),
+      ('shopping', '购物'),
+      ('entertainment', '娱乐'),
+      ('travel', '出行'),
+      ('life', '生活'),
+      ('sports', '运动'),
+    ];
+
+    return SizedBox(
+      height: 36,
+      child: ListView.separated(
+        scrollDirection: Axis.horizontal,
+        padding: const EdgeInsets.symmetric(horizontal: 20),
+        itemCount: categories.length,
+        separatorBuilder: (_, __) => const SizedBox(width: 8),
+        itemBuilder: (context, index) {
+          final (key, label) = categories[index];
+          final isSelected = _selectedCategory == key;
+          return GestureDetector(
+            onTap: () => setState(() => _selectedCategory = key),
+            child: Container(
+              padding: const EdgeInsets.symmetric(horizontal: 16),
+              decoration: BoxDecoration(
+                color: isSelected ? AppColors.primary : AppColors.gray50,
+                borderRadius: AppSpacing.borderRadiusFull,
+                border: isSelected
+                    ? null
+                    : Border.all(color: AppColors.borderLight),
+              ),
+              alignment: Alignment.center,
+              child: Text(
+                label,
+                style: AppTypography.labelSmall.copyWith(
+                  color: isSelected ? Colors.white : AppColors.textSecondary,
+                ),
+              ),
+            ),
+          );
+        },
+      ),
+    );
+  }
+
+  // ============================================================
+  // 排序栏
+  // ============================================================
+  Widget _buildSortBar() {
+    final sorts = ['折扣率', '价格↑', '价格↓', '到期时间'];
+    return Padding(
+      padding: const EdgeInsets.symmetric(horizontal: 20, vertical: 8),
+      child: Row(
+        children: sorts.asMap().entries.map((entry) {
+          final isSelected = _sortIndex == entry.key;
+          return Padding(
+            padding: const EdgeInsets.only(right: 16),
+            child: GestureDetector(
+              onTap: () => setState(() => _sortIndex = entry.key),
+              child: Text(
+                entry.value,
+                style: AppTypography.caption.copyWith(
+                  color: isSelected ? AppColors.primary : AppColors.textTertiary,
+                  fontWeight: isSelected ? FontWeight.w600 : FontWeight.w400,
+                ),
+              ),
+            ),
+          );
+        }).toList(),
+      ),
     );
   }
 
@@ -84,7 +177,7 @@ class _MarketPageState extends State<MarketPage>
   // ============================================================
   Widget _buildPrimaryMarket() {
     return ListView.separated(
-      padding: const EdgeInsets.fromLTRB(20, 16, 20, 100),
+      padding: const EdgeInsets.fromLTRB(20, 12, 20, 100),
       itemCount: _mockLaunches.length,
       separatorBuilder: (_, __) => const SizedBox(height: 12),
       itemBuilder: (context, index) {
@@ -108,7 +201,7 @@ class _MarketPageState extends State<MarketPage>
         child: Column(
           crossAxisAlignment: CrossAxisAlignment.start,
           children: [
-            // Header: brand + status badge
+            // Header: brand + category + status
             Row(
               children: [
                 Container(
@@ -126,14 +219,32 @@ class _MarketPageState extends State<MarketPage>
                   child: Column(
                     crossAxisAlignment: CrossAxisAlignment.start,
                     children: [
-                      Text(launch.brandName, style: AppTypography.labelMedium),
+                      Row(
-                      Text(launch.couponName, style: AppTypography.bodySmall),
+                        children: [
+                          Text(launch.brandName,
+                              style: AppTypography.labelMedium),
+                          const SizedBox(width: 6),
+                          Container(
+                            padding: const EdgeInsets.symmetric(
+                                horizontal: 5, vertical: 1),
+                            decoration: BoxDecoration(
+                              color: AppColors.gray100,
+                              borderRadius: AppSpacing.borderRadiusFull,
+                            ),
+                            child: Text(launch.categoryLabel,
+                                style: AppTypography.caption
+                                    .copyWith(fontSize: 10)),
+                          ),
+                        ],
+                      ),
+                      Text(launch.couponName,
+                          style: AppTypography.bodySmall),
                     ],
                   ),
                 ),
                 Container(
-                  padding:
+                  padding: const EdgeInsets.symmetric(
-                      const EdgeInsets.symmetric(horizontal: 8, vertical: 4),
+                      horizontal: 8, vertical: 4),
                   decoration: BoxDecoration(
                     color: launch.statusColor.withValues(alpha: 0.1),
                     borderRadius: AppSpacing.borderRadiusFull,
@@ -151,19 +262,24 @@ class _MarketPageState extends State<MarketPage>
 
             const SizedBox(height: 16),
 
-            // Price + Supply info
+            // Price info
             Row(
               children: [
-                _buildLaunchInfo('发行价', '\$${launch.issuePrice.toStringAsFixed(2)}'),
+                _buildLaunchInfo('发行价',
-                _buildLaunchInfo('面值', '\$${launch.faceValue.toStringAsFixed(0)}'),
+                    '\$${launch.issuePrice.toStringAsFixed(2)}'),
-                _buildLaunchInfo('折扣', '${(launch.issuePrice / launch.faceValue * 10).toStringAsFixed(1)}折'),
+                _buildLaunchInfo(
-                _buildLaunchInfo('发行量', '${launch.totalSupply}'),
+                    '面值', '\$${launch.faceValue.toStringAsFixed(0)}'),
+                _buildLaunchInfo(
+                    '折扣',
+                    '${(launch.issuePrice / launch.faceValue * 10).toStringAsFixed(1)}折'),
+                _buildLaunchInfo(
+                    '发行量', '${launch.totalSupply}'),
               ],
             ),
 
             const SizedBox(height: 12),
 
-            // Progress bar
+            // Progress
             Column(
               crossAxisAlignment: CrossAxisAlignment.start,
               children: [
@@ -187,8 +303,8 @@ class _MarketPageState extends State<MarketPage>
                     value: launch.soldPercent,
                     minHeight: 6,
                     backgroundColor: AppColors.gray100,
-                    valueColor:
+                    valueColor: const AlwaysStoppedAnimation<Color>(
-                        const AlwaysStoppedAnimation<Color>(AppColors.primary),
+                        AppColors.primary),
                   ),
                 ),
               ],
@@ -196,7 +312,6 @@ class _MarketPageState extends State<MarketPage>
 
             if (launch.status == 0) ...[
               const SizedBox(height: 12),
-              // Countdown
               Row(
                 children: [
                   const Icon(Icons.access_time_rounded,
@@ -236,26 +351,19 @@ class _MarketPageState extends State<MarketPage>
   }
 
   // ============================================================
-  // 二级市场 - 交易所行情 (Binance style)
+  // 二级市场 - 交易所行情（按行业分类浏览）
   // ============================================================
   Widget _buildSecondaryMarket() {
     return Column(
       children: [
-        const SizedBox(height: 12),
+        // 表头
-        // Pair type tabs
-        _buildPairTypeTabs(),
-
-        const SizedBox(height: 8),
-
-        // Column headers
         Padding(
           padding: const EdgeInsets.symmetric(horizontal: 20, vertical: 8),
           child: Row(
             children: [
               Expanded(
                   flex: 3,
-                  child:
+                  child: Text('券名/品牌', style: AppTypography.caption)),
-                      Text('交易对', style: AppTypography.caption)),
               Expanded(
                   flex: 2,
                   child: Text('最新价',
@@ -269,18 +377,17 @@ class _MarketPageState extends State<MarketPage>
             ],
           ),
         ),
-
         const Divider(height: 1),
 
-        // Trading pairs list
+        // 券行情列表
         Expanded(
           child: ListView.separated(
             padding: const EdgeInsets.fromLTRB(20, 0, 20, 100),
-            itemCount: _currentPairs.length,
+            itemCount: _mockTradingItems.length,
             separatorBuilder: (_, __) => const Divider(height: 1),
             itemBuilder: (context, index) {
-              final pair = _currentPairs[index];
+              final item = _mockTradingItems[index];
-              return _buildTradingPairRow(context, pair);
+              return _buildTradingRow(context, item);
             },
           ),
         ),
@@ -288,55 +395,18 @@ class _MarketPageState extends State<MarketPage>
     );
   }
 
-  Widget _buildPairTypeTabs() {
+  Widget _buildTradingRow(BuildContext context, _TradingItem item) {
-    final tabs = ['券/法币', '券/数字货币', '券/稳定币', '收藏'];
+    final isPositive = item.change24h >= 0;
-    return SizedBox(
-      height: 36,
-      child: ListView.separated(
-        scrollDirection: Axis.horizontal,
-        padding: const EdgeInsets.symmetric(horizontal: 20),
-        itemCount: tabs.length,
-        separatorBuilder: (_, __) => const SizedBox(width: 8),
-        itemBuilder: (context, index) {
-          final isSelected = _pairTypeIndex == index;
-          return GestureDetector(
-            onTap: () => setState(() => _pairTypeIndex = index),
-            child: Container(
-              padding: const EdgeInsets.symmetric(horizontal: 16),
-              decoration: BoxDecoration(
-                color: isSelected ? AppColors.primary : AppColors.gray50,
-                borderRadius: AppSpacing.borderRadiusFull,
-                border:
-                    isSelected ? null : Border.all(color: AppColors.borderLight),
-              ),
-              alignment: Alignment.center,
-              child: Text(
-                tabs[index],
-                style: AppTypography.labelSmall.copyWith(
-                  color: isSelected ? Colors.white : AppColors.textSecondary,
-                ),
-              ),
-            ),
-          );
-        },
-      ),
-    );
-  }
-
-  Widget _buildTradingPairRow(BuildContext context, _TradingPair pair) {
-    final isPositive = pair.change24h >= 0;
     final changeColor = isPositive ? AppColors.success : AppColors.error;
     final changePrefix = isPositive ? '+' : '';
 
     return InkWell(
-      onTap: () {
+      onTap: () => Navigator.pushNamed(context, '/trading/detail'),
-        Navigator.pushNamed(context, '/trading/detail', arguments: pair);
-      },
       child: Padding(
         padding: const EdgeInsets.symmetric(vertical: 14),
         child: Row(
           children: [
-            // Trading pair name
+            // 券名 + 品牌 + 行业标签
             Expanded(
               flex: 3,
               child: Column(
@@ -345,63 +415,71 @@ class _MarketPageState extends State<MarketPage>
                   Row(
                     children: [
                       Text(
-                        pair.baseName,
+                        item.couponName,
                         style: AppTypography.labelMedium.copyWith(
                           fontWeight: FontWeight.w600,
                         ),
                       ),
-                      Text(
+                      const SizedBox(width: 4),
-                        ' / ${pair.quoteName}',
+                      Container(
-                        style: AppTypography.bodySmall.copyWith(
+                        padding: const EdgeInsets.symmetric(
-                          color: AppColors.textTertiary,
+                            horizontal: 4, vertical: 1),
+                        decoration: BoxDecoration(
+                          color: AppColors.gray100,
+                          borderRadius: AppSpacing.borderRadiusFull,
+                        ),
+                        child: Text(
+                          item.categoryLabel,
+                          style: AppTypography.caption
+                              .copyWith(fontSize: 9),
                         ),
                       ),
                     ],
                   ),
                   const SizedBox(height: 2),
                   Text(
-                    'Vol ${pair.volume24h}',
+                    '${item.brandName} · Vol ${item.volume24h}',
                     style: AppTypography.caption,
                   ),
                 ],
               ),
             ),
 
-            // Price
+            // 最新价
             Expanded(
               flex: 2,
               child: Column(
                 crossAxisAlignment: CrossAxisAlignment.end,
                 children: [
                   Text(
-                    pair.priceDisplay,
+                    '\$${item.currentPrice.toStringAsFixed(2)}',
                     style: AppTypography.labelMedium.copyWith(
                       color: changeColor,
                       fontWeight: FontWeight.w600,
                     ),
                   ),
                   Text(
-                    '≈ \$${pair.priceUsd.toStringAsFixed(2)}',
+                    '面值 \$${item.faceValue.toStringAsFixed(0)}',
                     style: AppTypography.caption,
                   ),
                 ],
               ),
             ),
 
-            // 24h Change
+            // 24h涨跌
             Expanded(
               flex: 2,
               child: Align(
                 alignment: Alignment.centerRight,
                 child: Container(
-                  padding:
+                  padding: const EdgeInsets.symmetric(
-                      const EdgeInsets.symmetric(horizontal: 10, vertical: 6),
+                      horizontal: 10, vertical: 6),
                   decoration: BoxDecoration(
                     color: changeColor,
                     borderRadius: AppSpacing.borderRadiusSm,
                   ),
                   child: Text(
-                    '$changePrefix${pair.change24h.toStringAsFixed(2)}%',
+                    '$changePrefix${item.change24h.toStringAsFixed(2)}%',
                     style: AppTypography.labelSmall.copyWith(
                       color: Colors.white,
                       fontWeight: FontWeight.w600,
@@ -415,21 +493,6 @@ class _MarketPageState extends State<MarketPage>
       ),
     );
   }
-
-  List<_TradingPair> get _currentPairs {
-    switch (_pairTypeIndex) {
-      case 0:
-        return _fiatPairs;
-      case 1:
-        return _cryptoPairs;
-      case 2:
-        return _stablePairs;
-      case 3:
-        return _favoritePairs;
-      default:
-        return _fiatPairs;
-    }
-  }
 }
 
 // ============================================================
@@ -438,6 +501,7 @@ class _MarketPageState extends State<MarketPage>
 class _LaunchItem {
   final String brandName;
   final String couponName;
+  final String categoryLabel;
   final double issuePrice;
   final double faceValue;
   final int totalSupply;
@@ -448,6 +512,7 @@ class _LaunchItem {
   const _LaunchItem({
     required this.brandName,
     required this.couponName,
+    required this.categoryLabel,
     required this.issuePrice,
     required this.faceValue,
     required this.totalSupply,
@@ -483,52 +548,44 @@ class _LaunchItem {
   }
 }
 
-class _TradingPair {
+class _TradingItem {
-  final String baseName;
+  final String couponName;
-  final String quoteName;
+  final String brandName;
-  final double price;
+  final String categoryLabel;
-  final double priceUsd;
+  final double faceValue;
+  final double currentPrice;
   final double change24h;
   final String volume24h;
-  final double high24h;
-  final double low24h;
-  final double open24h;
 
-  const _TradingPair({
+  const _TradingItem({
-    required this.baseName,
+    required this.couponName,
-    required this.quoteName,
+    required this.brandName,
-    required this.price,
+    required this.categoryLabel,
-    required this.priceUsd,
+    required this.faceValue,
+    required this.currentPrice,
     required this.change24h,
     required this.volume24h,
-    required this.high24h,
-    required this.low24h,
-    required this.open24h,
   });
-
-  String get priceDisplay => price >= 1
-      ? price.toStringAsFixed(2)
-      : price.toStringAsFixed(6);
-
-  String get pairSymbol => '$baseName/$quoteName';
 }
 
 // ============================================================
 // Mock Data
 // ============================================================
-final _mockLaunches = [
+const _mockLaunches = [
-  const _LaunchItem(
+  _LaunchItem(
     brandName: 'Starbucks',
     couponName: '星巴克 \$25 礼品卡 2026春季限定',
+    categoryLabel: '餐饮',
     issuePrice: 21.25,
     faceValue: 25.0,
     totalSupply: 10000,
     soldPercent: 0.73,
     status: 1,
   ),
-  const _LaunchItem(
+  _LaunchItem(
     brandName: 'Nike',
     couponName: 'Nike \$100 运动券 Air Max 联名',
+    categoryLabel: '运动',
     issuePrice: 82.0,
     faceValue: 100.0,
     totalSupply: 5000,
@@ -536,110 +593,109 @@ final _mockLaunches = [
     status: 0,
     countdown: '2天 14:30:00',
   ),
-  const _LaunchItem(
+  _LaunchItem(
     brandName: 'Amazon',
     couponName: 'Amazon \$50 购物券 Prime专属',
+    categoryLabel: '购物',
     issuePrice: 42.5,
     faceValue: 50.0,
     totalSupply: 20000,
     soldPercent: 1.0,
     status: 2,
   ),
-  const _LaunchItem(
+  _LaunchItem(
     brandName: 'Walmart',
     couponName: 'Walmart \$30 生活券',
+    categoryLabel: '生活',
     issuePrice: 24.0,
     faceValue: 30.0,
     totalSupply: 15000,
     soldPercent: 0.45,
     status: 1,
   ),
-];
+  _LaunchItem(
-
+    brandName: 'AMC',
-// 券/法币 trading pairs
+    couponName: 'AMC \$20 电影券 IMAX场',
-final _fiatPairs = [
+    categoryLabel: '娱乐',
-  const _TradingPair(
+    issuePrice: 16.0,
-    baseName: 'SBUX', quoteName: 'USD',
+    faceValue: 20.0,
-    price: 21.35, priceUsd: 21.35, change24h: 2.15,
+    totalSupply: 8000,
-    volume24h: '125.3K', high24h: 21.80, low24h: 20.90, open24h: 20.90,
+    soldPercent: 0.88,
-  ),
+    status: 1,
-  const _TradingPair(
-    baseName: 'AMZN', quoteName: 'USD',
-    price: 85.20, priceUsd: 85.20, change24h: -1.23,
-    volume24h: '89.7K', high24h: 87.50, low24h: 84.10, open24h: 86.26,
-  ),
-  const _TradingPair(
-    baseName: 'NIKE', quoteName: 'USD',
-    price: 68.50, priceUsd: 68.50, change24h: 5.32,
-    volume24h: '234.1K', high24h: 69.20, low24h: 65.00, open24h: 65.04,
-  ),
-  const _TradingPair(
-    baseName: 'TGT', quoteName: 'CNY',
-    price: 168.80, priceUsd: 24.00, change24h: -0.56,
-    volume24h: '45.2K', high24h: 170.50, low24h: 167.00, open24h: 169.75,
-  ),
-  const _TradingPair(
-    baseName: 'WMT', quoteName: 'USD',
-    price: 42.30, priceUsd: 42.30, change24h: 1.87,
-    volume24h: '67.8K', high24h: 43.00, low24h: 41.50, open24h: 41.52,
-  ),
-  const _TradingPair(
-    baseName: 'COST', quoteName: 'USD',
-    price: 38.75, priceUsd: 38.75, change24h: 3.41,
-    volume24h: '156.2K', high24h: 39.50, low24h: 37.40, open24h: 37.47,
   ),
 ];
 
-// 券/数字货币 trading pairs
+const _mockTradingItems = [
-final _cryptoPairs = [
+  _TradingItem(
-  const _TradingPair(
+    couponName: '星巴克\$25',
-    baseName: 'SBUX', quoteName: 'BTC',
+    brandName: 'Starbucks',
-    price: 0.000215, priceUsd: 21.35, change24h: 1.85,
+    categoryLabel: '餐饮',
-    volume24h: '12.5K', high24h: 0.000220, low24h: 0.000210, open24h: 0.000211,
+    faceValue: 25.0,
+    currentPrice: 21.35,
+    change24h: 2.15,
+    volume24h: '125.3K',
   ),
-  const _TradingPair(
+  _TradingItem(
-    baseName: 'AMZN', quoteName: 'ETH',
+    couponName: 'Amazon\$100',
-    price: 0.0234, priceUsd: 85.20, change24h: -2.10,
+    brandName: 'Amazon',
-    volume24h: '8.3K', high24h: 0.0240, low24h: 0.0230, open24h: 0.0239,
+    categoryLabel: '购物',
+    faceValue: 100.0,
+    currentPrice: 85.20,
+    change24h: -1.23,
+    volume24h: '89.7K',
   ),
-  const _TradingPair(
+  _TradingItem(
-    baseName: 'NIKE', quoteName: 'BTC',
+    couponName: 'Nike\$80',
-    price: 0.000690, priceUsd: 68.50, change24h: 4.56,
+    brandName: 'Nike',
-    volume24h: '15.7K', high24h: 0.000700, low24h: 0.000660, open24h: 0.000660,
+    categoryLabel: '运动',
+    faceValue: 80.0,
+    currentPrice: 68.50,
+    change24h: 5.32,
+    volume24h: '234.1K',
+  ),
+  _TradingItem(
+    couponName: 'Target\$30',
+    brandName: 'Target',
+    categoryLabel: '购物',
+    faceValue: 30.0,
+    currentPrice: 24.00,
+    change24h: -0.56,
+    volume24h: '45.2K',
+  ),
+  _TradingItem(
+    couponName: 'Walmart\$50',
+    brandName: 'Walmart',
+    categoryLabel: '生活',
+    faceValue: 50.0,
+    currentPrice: 42.30,
+    change24h: 1.87,
+    volume24h: '67.8K',
+  ),
+  _TradingItem(
+    couponName: 'Costco\$40',
+    brandName: 'Costco',
+    categoryLabel: '购物',
+    faceValue: 40.0,
+    currentPrice: 33.60,
+    change24h: 3.41,
+    volume24h: '156.2K',
+  ),
+  _TradingItem(
+    couponName: 'AMC\$20',
+    brandName: 'AMC',
+    categoryLabel: '娱乐',
+    faceValue: 20.0,
+    currentPrice: 16.80,
+    change24h: -2.10,
+    volume24h: '78.5K',
+  ),
+  _TradingItem(
+    couponName: 'Uber\$25',
+    brandName: 'Uber',
+    categoryLabel: '出行',
+    faceValue: 25.0,
+    currentPrice: 21.00,
+    change24h: 0.95,
+    volume24h: '34.1K',
   ),
 ];
-
-// 券/稳定币 trading pairs
-final _stablePairs = [
-  const _TradingPair(
-    baseName: 'SBUX', quoteName: 'USDT',
-    price: 21.30, priceUsd: 21.30, change24h: 2.05,
-    volume24h: '342.5K', high24h: 21.75, low24h: 20.85, open24h: 20.87,
-  ),
-  const _TradingPair(
-    baseName: 'AMZN', quoteName: 'USDT',
-    price: 85.10, priceUsd: 85.10, change24h: -1.35,
-    volume24h: '189.2K', high24h: 87.40, low24h: 84.00, open24h: 86.26,
-  ),
-  const _TradingPair(
-    baseName: 'NIKE', quoteName: 'USDC',
-    price: 68.45, priceUsd: 68.45, change24h: 5.20,
-    volume24h: '278.9K', high24h: 69.10, low24h: 64.90, open24h: 65.07,
-  ),
-  const _TradingPair(
-    baseName: 'WMT', quoteName: 'USDT',
-    price: 42.25, priceUsd: 42.25, change24h: 1.92,
-    volume24h: '98.4K', high24h: 42.90, low24h: 41.45, open24h: 41.45,
-  ),
-  const _TradingPair(
-    baseName: 'TGT', quoteName: 'USDC',
-    price: 24.10, priceUsd: 24.10, change24h: -0.41,
-    volume24h: '34.1K', high24h: 24.50, low24h: 23.80, open24h: 24.20,
-  ),
-];
-
-// Favorites
-final _favoritePairs = [
-  _stablePairs[0], // SBUX/USDT
-  _fiatPairs[2],   // NIKE/USD
-];

frontend/genex-mobile/lib/features/trading/presentation/pages/trading_detail_page.dart

@@ -3,11 +3,11 @@ import 'package:flutter/material.dart';
 import '../../../../app/theme/app_colors.dart';
 import '../../../../app/theme/app_typography.dart';
 import '../../../../app/theme/app_spacing.dart';
-import '../../../../shared/widgets/genex_button.dart';
 
-/// 交易对详情页 - 币安风格
+/// 券交易详情页 - 币安风格
 ///
-/// K线图 + OHLC + 交易深度 + 买卖盘口 + 下单
+/// 券信息卡片 + K线图 + OHLC + 交易深度 + 买卖盘口 + 下单
+/// 计价货币由用户在"我的→设置"中配置，默认跟随语言
 class TradingDetailPage extends StatefulWidget {
   const TradingDetailPage({super.key});
 
@@ -22,6 +22,21 @@ class _TradingDetailPageState extends State<TradingDetailPage>
   String _orderType = 'limit'; // limit, market
   late TabController _bottomTabController;
 
+  // Mock coupon data (实际从路由参数或状态管理获取)
+  final _coupon = const _CouponInfo(
+    couponName: '星巴克\$25 礼品卡',
+    brandName: 'Starbucks',
+    categoryLabel: '餐饮',
+    faceValue: 25.0,
+    currentPrice: 21.30,
+    change24h: 2.05,
+    creditRating: 'AAA',
+    expiryDate: '2026/06/30',
+  );
+
+  // 计价货币符号 (从用户设置读取)
+  final String _currencySymbol = '\$';
+
   @override
   void initState() {
     super.initState();
@@ -38,14 +53,14 @@ class _TradingDetailPageState extends State<TradingDetailPage>
   Widget build(BuildContext context) {
     return Scaffold(
       appBar: AppBar(
-        title: const Text('SBUX / USDT'),
+        title: Text(_coupon.couponName),
         actions: [
           IconButton(
             icon: const Icon(Icons.star_border_rounded, size: 22),
             onPressed: () {},
           ),
           IconButton(
-            icon: const Icon(Icons.more_horiz_rounded, size: 22),
+            icon: const Icon(Icons.share_rounded, size: 22),
             onPressed: () {},
           ),
         ],
@@ -57,6 +72,9 @@ class _TradingDetailPageState extends State<TradingDetailPage>
               child: Column(
                 crossAxisAlignment: CrossAxisAlignment.start,
                 children: [
+                  // Coupon info card
+                  _buildCouponInfoCard(),
+
                   // Price header
                   _buildPriceHeader(),
 
@@ -94,12 +112,93 @@ class _TradingDetailPageState extends State<TradingDetailPage>
     );
   }
 
+  // ============================================================
+  // Coupon Info Card - 券基本信息
+  // ============================================================
+  Widget _buildCouponInfoCard() {
+    return Container(
+      margin: const EdgeInsets.fromLTRB(20, 8, 20, 0),
+      padding: const EdgeInsets.all(12),
+      decoration: BoxDecoration(
+        color: AppColors.primarySurface,
+        borderRadius: AppSpacing.borderRadiusMd,
+        border: Border.all(color: AppColors.primary.withValues(alpha: 0.15)),
+      ),
+      child: Row(
+        children: [
+          // Icon
+          Container(
+            width: 40,
+            height: 40,
+            decoration: BoxDecoration(
+              color: AppColors.surface,
+              borderRadius: AppSpacing.borderRadiusSm,
+            ),
+            child: const Icon(Icons.confirmation_number_outlined,
+                color: AppColors.primary, size: 20),
+          ),
+          const SizedBox(width: 12),
+          // Info
+          Expanded(
+            child: Column(
+              crossAxisAlignment: CrossAxisAlignment.start,
+              children: [
+                Row(
+                  children: [
+                    Text(_coupon.brandName,
+                        style: AppTypography.labelMedium),
+                    const SizedBox(width: 6),
+                    Container(
+                      padding: const EdgeInsets.symmetric(
+                          horizontal: 5, vertical: 1),
+                      decoration: BoxDecoration(
+                        color: AppColors.gray100,
+                        borderRadius: AppSpacing.borderRadiusFull,
+                      ),
+                      child: Text(_coupon.categoryLabel,
+                          style:
+                              AppTypography.caption.copyWith(fontSize: 10)),
+                    ),
+                    const SizedBox(width: 6),
+                    Container(
+                      padding: const EdgeInsets.symmetric(
+                          horizontal: 5, vertical: 1),
+                      decoration: BoxDecoration(
+                        color: AppColors.success.withValues(alpha: 0.1),
+                        borderRadius: AppSpacing.borderRadiusFull,
+                      ),
+                      child: Text(_coupon.creditRating,
+                          style: AppTypography.caption.copyWith(
+                            fontSize: 10,
+                            color: AppColors.success,
+                            fontWeight: FontWeight.w600,
+                          )),
+                    ),
+                  ],
+                ),
+                const SizedBox(height: 2),
+                Text(
+                  '面值 $_currencySymbol${_coupon.faceValue.toStringAsFixed(0)} · 到期 ${_coupon.expiryDate}',
+                  style: AppTypography.caption,
+                ),
+              ],
+            ),
+          ),
+        ],
+      ),
+    );
+  }
+
   // ============================================================
   // Price Header - OHLC + 24h stats
   // ============================================================
   Widget _buildPriceHeader() {
+    final isPositive = _coupon.change24h >= 0;
+    final changeColor = isPositive ? AppColors.success : AppColors.error;
+    final changePrefix = isPositive ? '+' : '';
+
     return Padding(
-      padding: const EdgeInsets.fromLTRB(20, 12, 20, 0),
+      padding: const EdgeInsets.fromLTRB(20, 16, 20, 0),
       child: Column(
         crossAxisAlignment: CrossAxisAlignment.start,
         children: [
@@ -108,15 +207,15 @@ class _TradingDetailPageState extends State<TradingDetailPage>
             crossAxisAlignment: CrossAxisAlignment.end,
             children: [
               Text(
-                '21.30',
+                '$_currencySymbol${_coupon.currentPrice.toStringAsFixed(2)}',
                 style: AppTypography.priceLarge.copyWith(
-                  color: AppColors.success,
+                  color: changeColor,
                   fontSize: 32,
                 ),
               ),
               const SizedBox(width: 8),
               Text(
-                '≈ \$21.30',
+                '折扣 ${(_coupon.currentPrice / _coupon.faceValue * 10).toStringAsFixed(1)}折',
                 style: AppTypography.bodySmall.copyWith(
                   color: AppColors.textTertiary,
                 ),
@@ -126,11 +225,11 @@ class _TradingDetailPageState extends State<TradingDetailPage>
                 padding:
                     const EdgeInsets.symmetric(horizontal: 10, vertical: 4),
                 decoration: BoxDecoration(
-                  color: AppColors.success,
+                  color: changeColor,
                   borderRadius: AppSpacing.borderRadiusSm,
                 ),
                 child: Text(
-                  '+2.05%',
+                  '$changePrefix${_coupon.change24h.toStringAsFixed(2)}%',
                   style: AppTypography.labelSmall.copyWith(
                     color: Colors.white,
                     fontWeight: FontWeight.w600,
@@ -145,9 +244,9 @@ class _TradingDetailPageState extends State<TradingDetailPage>
           // 24h OHLC stats
           Row(
             children: [
-              _buildOhlcStat('24h高', '21.75', AppColors.error),
+              _buildOhlcStat('24h高', '${_currencySymbol}21.75', AppColors.error),
-              _buildOhlcStat('24h低', '20.85', AppColors.success),
+              _buildOhlcStat('24h低', '${_currencySymbol}20.85', AppColors.success),
-              _buildOhlcStat('开盘', '20.87', AppColors.textPrimary),
+              _buildOhlcStat('开盘', '${_currencySymbol}20.87', AppColors.textPrimary),
               _buildOhlcStat('24h量', '342.5K', AppColors.textPrimary),
             ],
           ),
@@ -199,7 +298,7 @@ class _TradingDetailPageState extends State<TradingDetailPage>
             top: 8,
             left: 12,
             child: Text(
-              'SBUX/USDT · $_selectedPeriod',
+              '${_coupon.couponName} · $_selectedPeriod',
               style: AppTypography.caption.copyWith(
                 color: AppColors.textTertiary,
               ),
@@ -291,7 +390,7 @@ class _TradingDetailPageState extends State<TradingDetailPage>
           mainAxisAlignment: MainAxisAlignment.spaceBetween,
           children: [
             Text(label, style: AppTypography.caption.copyWith(color: color)),
-            Text('数量', style: AppTypography.caption),
+            Text('数量(张)', style: AppTypography.caption),
           ],
         ),
         const SizedBox(height: 6),
@@ -322,7 +421,7 @@ class _TradingDetailPageState extends State<TradingDetailPage>
                     mainAxisAlignment: MainAxisAlignment.spaceBetween,
                     children: [
                       Text(
-                        prices[i].toStringAsFixed(2),
+                        '$_currencySymbol${prices[i].toStringAsFixed(2)}',
                         style: AppTypography.caption.copyWith(
                           color: color,
                           fontWeight: FontWeight.w500,
@@ -427,7 +526,7 @@ class _TradingDetailPageState extends State<TradingDetailPage>
 
           // Price input (hidden for market orders)
           if (_orderType == 'limit') ...[
-            _buildInputField('价格', '21.30', 'USDT'),
+            _buildInputField('价格', '21.30', _currencySymbol),
             const SizedBox(height: 8),
           ],
 
@@ -457,7 +556,9 @@ class _TradingDetailPageState extends State<TradingDetailPage>
             children: [
               Text('可用', style: AppTypography.caption),
               Text(
-                _isBuy ? '1,234.56 USDT' : '3 张 SBUX',
+                _isBuy
+                    ? '${_currencySymbol}1,234.56'
+                    : '3 张 ${_coupon.couponName}',
                 style: AppTypography.caption.copyWith(
                   color: AppColors.textPrimary,
                   fontWeight: FontWeight.w500,
@@ -483,7 +584,7 @@ class _TradingDetailPageState extends State<TradingDetailPage>
                 ),
               ),
               child: Text(
-                _isBuy ? '买入 SBUX' : '卖出 SBUX',
+                _isBuy ? '买入 ${_coupon.couponName}' : '卖出 ${_coupon.couponName}',
                 style: AppTypography.labelLarge.copyWith(color: Colors.white),
               ),
             ),
@@ -605,17 +706,17 @@ class _TradingDetailPageState extends State<TradingDetailPage>
           const SizedBox(height: 12),
 
           // Mock orders
-          _buildOrderItem('买入', 'SBUX/USDT', '21.20', '5', '限价',
+          _buildOrderItem(
-              AppColors.success),
+              '买入', _coupon.couponName, '21.20', '5', '限价', AppColors.success),
           const Divider(height: 1),
-          _buildOrderItem('卖出', 'SBUX/USDT', '21.50', '2', '限价',
+          _buildOrderItem(
-              AppColors.error),
+              '卖出', _coupon.couponName, '21.50', '2', '限价', AppColors.error),
         ],
       ),
     );
   }
 
-  Widget _buildOrderItem(String side, String pair, String price,
+  Widget _buildOrderItem(String side, String couponName, String price,
       String amount, String type, Color sideColor) {
     return Padding(
       padding: const EdgeInsets.symmetric(vertical: 12),
@@ -640,8 +741,8 @@ class _TradingDetailPageState extends State<TradingDetailPage>
             child: Column(
               crossAxisAlignment: CrossAxisAlignment.start,
               children: [
-                Text(pair, style: AppTypography.labelSmall),
+                Text(couponName, style: AppTypography.labelSmall),
-                Text('$type · $amount张 @ $price',
+                Text('$type · ${amount}张 @ $_currencySymbol$price',
                     style: AppTypography.caption),
               ],
             ),
@@ -720,6 +821,31 @@ class _TradingDetailPageState extends State<TradingDetailPage>
   }
 }
 
+// ============================================================
+// Data Model
+// ============================================================
+class _CouponInfo {
+  final String couponName;
+  final String brandName;
+  final String categoryLabel;
+  final double faceValue;
+  final double currentPrice;
+  final double change24h;
+  final String creditRating;
+  final String expiryDate;
+
+  const _CouponInfo({
+    required this.couponName,
+    required this.brandName,
+    required this.categoryLabel,
+    required this.faceValue,
+    required this.currentPrice,
+    required this.change24h,
+    required this.creditRating,
+    required this.expiryDate,
+  });
+}
+
 // ============================================================
 // Mock Candlestick Chart Painter
 // ============================================================