feat(mobile-app): 可结算奖励卡片显示来源信息

在"我的"页面可结算板块中，每笔收益现在会显示来源信息（通过 memo 字段）

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

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

@@ -72,6 +72,7 @@ class SettleableRewardItem {
   final DateTime createdAt;
   final DateTime? claimedAt;
   final String sourceOrderNo;
+  final String? sourceAccountSequence;  // 触发奖励的用户账户序列号
   final String memo;
 
   SettleableRewardItem({
@@ -82,6 +83,7 @@ class SettleableRewardItem {
     required this.createdAt,
     this.claimedAt,
     required this.sourceOrderNo,
+    this.sourceAccountSequence,
     required this.memo,
   });
 
@@ -94,6 +96,7 @@ class SettleableRewardItem {
       createdAt: DateTime.tryParse(json['createdAt'] ?? '') ?? DateTime.now(),
       claimedAt: json['claimedAt'] != null ? DateTime.tryParse(json['claimedAt']) : null,
       sourceOrderNo: json['sourceOrderNo'] ?? '',
+      sourceAccountSequence: json['sourceAccountSequence'],
       memo: json['memo'] ?? '',
     );
   }

frontend/mobile-app/lib/features/profile/presentation/pages/profile_page.dart

@@ -2431,7 +2431,7 @@ class _ProfilePageState extends ConsumerState<ProfilePage> {
             StackedCardsView<SettleableRewardItem>(
               items: _settleableRewards,
               peekHeight: 28,
-              expandedCardHeight: 90,
+              expandedCardHeight: 110,
               enableSound: true,
               itemBuilder: (item, isSelected, index) => _buildStackedSettleableRewardCard(item, isSelected),
             ),
@@ -2604,7 +2604,7 @@ class _ProfilePageState extends ConsumerState<ProfilePage> {
     final amountText = amountParts.isNotEmpty ? amountParts.join('  ') : '0 绿积分';
 
     return Container(
-      height: isSelected ? 90 : 48,
+      height: isSelected ? 110 : 48,
       decoration: BoxDecoration(
         color: isSelected ? Colors.white : const Color(0xFFFFFDF8),
         borderRadius: BorderRadius.circular(8),
@@ -2653,7 +2653,7 @@ class _ProfilePageState extends ConsumerState<ProfilePage> {
                       ),
                     ],
                   ),
-                  const SizedBox(height: 8),
+                  const SizedBox(height: 6),
                   // 第二行：金额信息
                   FittedBox(
                     fit: BoxFit.scaleDown,
@@ -2668,6 +2668,20 @@ class _ProfilePageState extends ConsumerState<ProfilePage> {
                       ),
                     ),
                   ),
+                  // 第三行：备注信息（显示来源）
+                  if (item.memo.isNotEmpty) ...[
+                    const SizedBox(height: 4),
+                    Text(
+                      item.memo,
+                      style: const TextStyle(
+                        fontSize: 11,
+                        fontFamily: 'Inter',
+                        color: Color(0x995D4037),
+                      ),
+                      maxLines: 2,
+                      overflow: TextOverflow.ellipsis,
+                    ),
+                  ],
                 ],
               ),
             )