feat(wallet+admin-web): 系统账户流水增加来源用户账户和来源备注列

问题：系统账户（S0000000001等）、省/市区域/团队账户的流水明细
只显示 allocationType 英文标识，无法追溯是哪个用户的认种产生的。

解决方案：从 wallet_ledger_entries.payload_json.metadata 中提取
sourceAccountSequence 和 memo 字段，通过 API 返回给前端展示。

后端 wallet-service 改动：
- LedgerEntryDTO 新增 sourceAccountSequence / sourceMemo 两个可选字段
- 新增 extractPayloadInfo() 辅助函数统一从 payloadJson 提取信息
- 替换所有 5 处 LedgerEntryDTO 映射，使用 extractPayloadInfo()
- 向后兼容：旧记录无 metadata 时返回 null，不影响已有功能

前端 admin-web 改动：
- LedgerEntryDTO 类型新增 sourceAccountSequence / sourceMemo 字段
- 固定账户明细表格和分类账明细表格增加"来源账户"和"来源备注"列
- 新增 .sourceAccount 样式（等宽字体显示账户序列号）

数据来源说明：
- 正常认种：reward-service 传入 metadata 含完整中文 memo 和 sourceAccountSequence
- 预种：planting-service 传入 metadata 含 sourceAccountSequence 和中文 memo
- 历史记录（2026-01-04前）：metadata 可能为空，显示为"-"

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

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

@@ -64,6 +64,10 @@ export interface LedgerEntryDTO {
   refTxHash: string | null;
   memo: string | null;
   allocationType: string | null;
+  /** 来源用户账户序列号（从 payloadJson.metadata 提取） */
+  sourceAccountSequence: string | null;
+  /** 来源中文备注（从 payloadJson.metadata.memo 提取） */
+  sourceMemo: string | null;
   createdAt: string;
 }
 
@@ -75,6 +79,21 @@ export interface PaginatedLedgerDTO {
   totalPages: number;
 }
 
+/** 从 payloadJson 中提取 metadata 信息用于 LedgerEntryDTO */
+function extractPayloadInfo(payloadJson: unknown): {
+  allocationType: string | null;
+  sourceAccountSequence: string | null;
+  sourceMemo: string | null;
+} {
+  const payload = payloadJson as Record<string, unknown> | null;
+  const metadata = payload?.metadata as Record<string, unknown> | null;
+  return {
+    allocationType: (payload?.allocationType as string) ?? null,
+    sourceAccountSequence: (metadata?.sourceAccountSequence as string) ?? null,
+    sourceMemo: (metadata?.memo as string) ?? null,
+  };
+}
+
 @Injectable()
 export class WalletApplicationService {
   private readonly logger = new Logger(WalletApplicationService.name);
@@ -1991,7 +2010,7 @@ export class WalletApplicationService {
         refOrderId: entry.refOrderId,
         refTxHash: entry.refTxHash,
         memo: entry.memo,
-        allocationType: (entry.payloadJson as Record<string, unknown>)?.allocationType as string ?? null,
+        ...extractPayloadInfo(entry.payloadJson),
         createdAt: entry.createdAt.toISOString(),
       })),
       total: result.total,
@@ -2036,7 +2055,7 @@ export class WalletApplicationService {
         refOrderId: entry.refOrderId,
         refTxHash: entry.refTxHash,
         memo: entry.memo,
-        allocationType: (entry.payloadJson as Record<string, unknown>)?.allocationType as string ?? null,
+        ...extractPayloadInfo(entry.payloadJson),
         createdAt: entry.createdAt.toISOString(),
       })),
       total: result.total,
@@ -2103,7 +2122,7 @@ export class WalletApplicationService {
               refOrderId: entry.refOrderId,
               refTxHash: entry.refTxHash,
               memo: entry.memo,
-              allocationType: (entry.payloadJson as Record<string, unknown>)?.allocationType as string ?? null,
+              ...extractPayloadInfo(entry.payloadJson),
               createdAt: entry.createdAt.toISOString(),
             })),
             total: ledgerResult.total,
@@ -2131,7 +2150,7 @@ export class WalletApplicationService {
               refOrderId: entry.refOrderId,
               refTxHash: entry.refTxHash,
               memo: entry.memo,
-              allocationType: (entry.payloadJson as Record<string, unknown>)?.allocationType as string ?? null,
+              ...extractPayloadInfo(entry.payloadJson),
               createdAt: entry.createdAt.toISOString(),
             })),
             total: ledgerResult.total,
@@ -2159,7 +2178,7 @@ export class WalletApplicationService {
               refOrderId: entry.refOrderId,
               refTxHash: entry.refTxHash,
               memo: entry.memo,
-              allocationType: (entry.payloadJson as Record<string, unknown>)?.allocationType as string ?? null,
+              ...extractPayloadInfo(entry.payloadJson),
               createdAt: entry.createdAt.toISOString(),
             })),
             total: ledgerResult.total,

frontend/admin-web/src/components/features/system-account-report/SystemAccountsTab.module.scss

@@ -512,6 +512,12 @@
   word-break: break-word;
 }
 
+.sourceAccount {
+  font-size: 13px;
+  font-family: monospace;
+  color: #374151;
+}
+
 /* [2026-01-06] 新增：详细明细列表样式 */
 .detailsSection {
   margin-top: 24px;

frontend/admin-web/src/components/features/system-account-report/SystemAccountsTab.tsx

@@ -443,6 +443,8 @@ function FixedAccountsSection({ data }: { data: SystemAccountReportResponse['fix
                     <th>类型</th>
                     <th>金额</th>
                     <th>余额</th>
+                    <th>来源账户</th>
+                    <th>来源备注</th>
                     <th>备注</th>
                   </tr>
                 </thead>
@@ -459,6 +461,8 @@ function FixedAccountsSection({ data }: { data: SystemAccountReportResponse['fix
                         {entry.amount >= 0 ? '+' : ''}{formatAmount(entry.amount)} {getAssetTypeLabel(entry.assetType)}
                       </td>
                       <td>{entry.balanceAfter !== null ? formatAmount(entry.balanceAfter) : '-'}</td>
+                      <td className={styles.sourceAccount}>{entry.sourceAccountSequence || '-'}</td>
+                      <td className={styles.memo}>{entry.sourceMemo || '-'}</td>
                       <td className={styles.memo}>{entry.memo || entry.allocationType || '-'}</td>
                     </tr>
                   ))}
@@ -1110,6 +1114,8 @@ function LedgerAccountCard({
                     <th>类型</th>
                     <th>金额</th>
                     <th>余额</th>
+                    <th>来源账户</th>
+                    <th>来源备注</th>
                     <th>备注</th>
                   </tr>
                 </thead>
@@ -1126,6 +1132,8 @@ function LedgerAccountCard({
                         {entry.amount >= 0 ? '+' : ''}{formatAmount(entry.amount)} {getAssetTypeLabel(entry.assetType)}
                       </td>
                       <td>{entry.balanceAfter !== null ? formatAmount(entry.balanceAfter) : '-'}</td>
+                      <td className={styles.sourceAccount}>{entry.sourceAccountSequence || '-'}</td>
+                      <td className={styles.memo}>{entry.sourceMemo || '-'}</td>
                       <td className={styles.memo}>{entry.memo || entry.allocationType || '-'}</td>
                     </tr>
                   ))}

frontend/admin-web/src/types/system-account.types.ts

@@ -195,6 +195,10 @@ export interface LedgerEntryDTO {
   refTxHash: string | null;
   memo: string | null;
   allocationType: string | null;
+  /** 来源用户账户序列号 */
+  sourceAccountSequence: string | null;
+  /** 来源中文备注 */
+  sourceMemo: string | null;
   createdAt: string;
 }