perf(frontend): 优化交易页面数据刷新策略

- 价格刷新: 5分钟 → 15秒
- 订单刷新: 2分钟 → 10秒
- 市场概览: 5分钟 → 30秒
- 交易账户: 2分钟 → 15秒
- 交易成功后立即刷新 + 2秒后再刷新 + 5秒后最终刷新
- 确保用户能快速看到做市商吃单后的成交状态

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

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

@@ -1061,14 +1061,37 @@ class _TradingPageState extends ConsumerState<TradingPage> {
       );
       if (success) {
         _quantityController.clear();
-        // 交易成功后刷新订单列表和资产
-        ref.invalidate(ordersProvider);
-        ref.invalidate(currentPriceProvider);
-        ref.invalidate(marketOverviewProvider);
-        // 刷新资产数据
-        final user = ref.read(userNotifierProvider);
-        ref.invalidate(accountAssetProvider(user.accountSequence ?? ''));
+        // 交易成功后立即刷新
+        _refreshAfterTrade();
       }
     }
   }
+
+  /// 交易成功后刷新数据
+  /// 立即刷新一次，然后在2秒和5秒后再各刷新一次
+  /// 确保能看到做市商处理后的最新状态
+  void _refreshAfterTrade() {
+    final user = ref.read(userNotifierProvider);
+    final accountSeq = user.accountSequence ?? '';
+
+    // 立即刷新
+    _doRefresh(accountSeq);
+
+    // 2秒后再刷新（做市商可能在1-4秒内吃单）
+    Future.delayed(const Duration(seconds: 2), () {
+      if (mounted) _doRefresh(accountSeq);
+    });
+
+    // 5秒后最终刷新（确保看到最终状态）
+    Future.delayed(const Duration(seconds: 5), () {
+      if (mounted) _doRefresh(accountSeq);
+    });
+  }
+
+  void _doRefresh(String accountSeq) {
+    ref.invalidate(ordersProvider);
+    ref.invalidate(currentPriceProvider);
+    ref.invalidate(marketOverviewProvider);
+    ref.invalidate(accountAssetProvider(accountSeq));
+  }
 }

frontend/mining-app/lib/presentation/providers/trading_providers.dart

@@ -68,13 +68,13 @@ final klinesProvider = FutureProvider<List<Kline>>((ref) async {
   );
 });
 
-// 当前价格 Provider (5分钟缓存)
+// 当前价格 Provider (15秒缓存 - 交易页面需要快速更新)
 final currentPriceProvider = FutureProvider<PriceInfo?>((ref) async {
   final repository = ref.watch(tradingRepositoryProvider);
   final result = await repository.getCurrentPrice();
 
   ref.keepAlive();
-  final timer = Timer(const Duration(minutes: 5), () {
+  final timer = Timer(const Duration(seconds: 15), () {
     ref.invalidateSelf();
   });
   ref.onDispose(() => timer.cancel());
@@ -85,13 +85,13 @@ final currentPriceProvider = FutureProvider<PriceInfo?>((ref) async {
   );
 });
 
-// 市场概览 Provider (5分钟缓存)
+// 市场概览 Provider (30秒缓存 - 市场数据相对稳定)
 final marketOverviewProvider = FutureProvider<MarketOverview?>((ref) async {
   final repository = ref.watch(tradingRepositoryProvider);
   final result = await repository.getMarketOverview();
 
   ref.keepAlive();
-  final timer = Timer(const Duration(minutes: 5), () {
+  final timer = Timer(const Duration(seconds: 30), () {
     ref.invalidateSelf();
   });
   ref.onDispose(() => timer.cancel());
@@ -102,7 +102,7 @@ final marketOverviewProvider = FutureProvider<MarketOverview?>((ref) async {
   );
 });
 
-// 交易账户 Provider (带参数)
+// 交易账户 Provider (15秒缓存 - 交易后快速更新资产)
 final tradingAccountProvider = FutureProvider.family<TradingAccount?, String>(
   (ref, accountSequence) async {
     if (accountSequence.isEmpty) return null;
@@ -111,7 +111,7 @@ final tradingAccountProvider = FutureProvider.family<TradingAccount?, String>(
     final result = await repository.getTradingAccount(accountSequence);
 
     ref.keepAlive();
-    final timer = Timer(const Duration(minutes: 2), () {
+    final timer = Timer(const Duration(seconds: 15), () {
       ref.invalidateSelf();
     });
     ref.onDispose(() => timer.cancel());
@@ -123,13 +123,13 @@ final tradingAccountProvider = FutureProvider.family<TradingAccount?, String>(
   },
 );
 
-// 订单列表 Provider
+// 订单列表 Provider (10秒缓存 - 交易后快速看到结果)
 final ordersProvider = FutureProvider<OrdersPageModel?>((ref) async {
   final repository = ref.watch(tradingRepositoryProvider);
   final result = await repository.getOrders(page: 1, pageSize: 10);
 
   ref.keepAlive();
-  final timer = Timer(const Duration(minutes: 2), () {
+  final timer = Timer(const Duration(seconds: 10), () {
     ref.invalidateSelf();
   });
   ref.onDispose(() => timer.cancel());