feat(mobile): 流水明细中 REWARD_PENDING 标注"已转可结算"

用户购买预种后 hasPlanted=true，所有 PENDING 奖励转为 SETTLED，
此时流水中历史的 REWARD_PENDING 条目追加"(已转可结算)"标注，
避免用户误以为还有未领取的奖励。仅在 pendingUsdt=0 时显示。

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

frontend/mobile-app/lib/core/services/wallet_service.dart

@@ -1507,6 +1507,18 @@ class LedgerEntry {
     return allocationTypeName ?? entryTypeName;
   }
 
+  /// [2026-03-01] 获取带状态标注的显示名称
+  /// 当用户已无待领取奖励时，REWARD_PENDING 流水追加"(已转可结算)"标注
+  String displayNameWithStatus({bool userHasNoPending = false}) {
+    final baseName = allocationTypeName ?? entryTypeName;
+
+    if (entryType == 'REWARD_PENDING' && userHasNoPending) {
+      return '$baseName (已转可结算)';
+    }
+
+    return baseName;
+  }
+
   /// 是否为收入
   bool get isIncome => amount > 0;
 }

frontend/mobile-app/lib/features/trading/presentation/pages/ledger_detail_page.dart

@@ -37,6 +37,9 @@ class _LedgerDetailPageState extends ConsumerState<LedgerDetailPage>
   int _currentPage = 1;
   static const int _pageSize = 20;
 
+  // [2026-03-01] 用户是否已无待领取奖励（用于标注 REWARD_PENDING 流水）
+  bool _userHasNoPending = false;
+
   // 流水类型选项
   final List<Map<String, String>> _entryTypes = [
     {'value': '', 'label': '全部'},
@@ -76,7 +79,7 @@ class _LedgerDetailPageState extends ConsumerState<LedgerDetailPage>
     try {
       final walletService = ref.read(walletServiceProvider);
 
-      // 并行加载统计和趋势
+      // 并行加载统计、趋势和钱包信息
       final results = await Future.wait([
         walletService.getLedgerStatistics(),
         walletService.getLedgerTrend(days: 30),
@@ -85,10 +88,12 @@ class _LedgerDetailPageState extends ConsumerState<LedgerDetailPage>
           pageSize: _pageSize,
           entryType: _selectedEntryType,
         ),
+        walletService.getMyWallet(),  // [2026-03-01] 获取 pendingUsdt 判断是否还有待领取
       ]);
 
       if (mounted) {
         final ledgerData = results[2] as PaginatedLedger;
+        final walletInfo = results[3] as WalletResponse;
 
         // 调试：打印加载的流水数据
         debugPrint('[LedgerDetailPage] ======== 加载流水数据 ========');
@@ -103,6 +108,7 @@ class _LedgerDetailPageState extends ConsumerState<LedgerDetailPage>
           _statistics = results[0] as LedgerStatistics;
           _trend = results[1] as LedgerTrend;
           _ledger = ledgerData;
+          _userHasNoPending = walletInfo.rewards.pendingUsdt <= 0;
           _isLoading = false;
         });
       }
@@ -989,7 +995,7 @@ class _LedgerDetailPageState extends ConsumerState<LedgerDetailPage>
                 crossAxisAlignment: CrossAxisAlignment.start,
                 children: [
                   Text(
-                    entry.displayName,
+                    entry.displayNameWithStatus(userHasNoPending: _userHasNoPending),
                     style: const TextStyle(
                       fontSize: 14,
                       fontWeight: FontWeight.w500,