feat(ledger): 流水明细显示来源用户ID + 统计兼容历史批量转换数据

- wallet_service.dart: LedgerEntry 新增 sourceAccountFromMemo 从 memo 提取来源用户
- ledger_detail_page.dart: 流水列表项显示"来自 Dxxx"金色文字
- ledger_detail_page.dart: 权益详情弹窗添加来源用户行和备注行
- wallet-application.service.ts: 统计/趋势保留 memo 兼容历史批量转换记录

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

backend/services/wallet-service/src/application/services/wallet-application.service.ts

@@ -2697,7 +2697,11 @@ export class WalletApplicationService {
       const amount = Number(entry.amount);
 
       // 只计算非临时性流水的收支统计
-      if (!excludeFromStats.has(entry.entryType)) {
+      // 兼容历史数据：老的批量转换记录 entry_type 仍为 REWARD_TO_SETTLEABLE，
+      // 通过 memo 中 "pending rewards settled" 识别并排除
+      const isExcluded = excludeFromStats.has(entry.entryType) ||
+        (entry.entryType === 'REWARD_TO_SETTLEABLE' && entry.memo?.includes('pending rewards settled'));
+      if (!isExcluded) {
         if (amount > 0) {
           totalIncome += amount;
         } else {
@@ -2791,8 +2795,10 @@ export class WalletApplicationService {
       const amount = Number(entry.amount);
       const existing = dailyMap.get(dateStr) || { income: 0, expense: 0, count: 0 };
 
-      // 只计算非临时性流水的收支统计
+      // 只计算非临时性流水的收支统计（兼容历史批量转换数据）
-      if (!excludeFromStats.has(entry.entryType)) {
+      const isExcluded = excludeFromStats.has(entry.entryType) ||
+        (entry.entryType === 'REWARD_TO_SETTLEABLE' && entry.memo?.includes('pending rewards settled'));
+      if (!isExcluded) {
         if (amount > 0) {
           existing.income += amount;
           periodIncome += amount;

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

@@ -1522,6 +1522,13 @@ class LedgerEntry {
     return baseName;
   }
 
+  /// 从 memo 中提取来源用户ID（格式如："来源: D26022600016"）
+  String? get sourceAccountFromMemo {
+    if (memo == null) return null;
+    final match = RegExp(r'来源:\s*(D\d+)').firstMatch(memo!);
+    return match?.group(1);
+  }
+
   /// 是否为收入
   bool get isIncome => amount > 0;
 }

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

@@ -1002,6 +1002,16 @@ class _LedgerDetailPageState extends ConsumerState<LedgerDetailPage>
                       color: Color(0xFF5D4037),
                     ),
                   ),
+                  if (entry.sourceAccountFromMemo != null) ...[
+                    const SizedBox(height: 2),
+                    Text(
+                      '来自 ${entry.sourceAccountFromMemo}',
+                      style: const TextStyle(
+                        fontSize: 11,
+                        color: Color(0xFFD4AF37),
+                      ),
+                    ),
+                  ],
                   const SizedBox(height: 4),
                   Text(
                     _formatDate(entry.createdAt),
@@ -1715,11 +1725,15 @@ class _RewardDetailSheet extends StatelessWidget {
                   ),
                   _buildDetailRow('权益类型', entry.displayName),
                   _buildDetailRow('流水类型', entry.entryTypeName),
+                  if (entry.sourceAccountFromMemo != null)
+                    _buildDetailRow('来源用户', entry.sourceAccountFromMemo!),
                   if (entry.balanceAfter != null)
                     _buildDetailRow('入账后余额', '${_formatAmount(entry.balanceAfter!)} 绿积分'),
                   _buildDetailRow('入账时间', _formatDateTime(entry.createdAt)),
                   if (entry.refOrderId != null && entry.refOrderId!.isNotEmpty)
                     _buildDetailRow('关联订单', entry.refOrderId!),
+                  if (entry.memo != null && entry.memo!.isNotEmpty)
+                    _buildDetailRow('备注', entry.memo!),
                 ],
               ),
             ),