fix(reporting-service): 总部储蓄账户余额也需累加过期收益

- 账户余额改为 usdtBalance + expiredRewardsTotal
- 与累计收入的计算方式保持一致
- 过期的分享权益会进入 S0000000001，余额和收入都应包含

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

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

backend/services/reporting-service/src/application/services/system-account-report-application.service.ts

@@ -302,7 +302,8 @@ export class SystemAccountReportApplicationService {
 
   /**
    * 组装固定账户数据
-   * [2026-01-07] 更新：将过期收益累加到总部储蓄账户 (HQ_COMMUNITY / S0000000001) 的累计收入中
+   * [2026-01-07] 更新：将过期收益累加到总部储蓄账户 (HQ_COMMUNITY / S0000000001) 的累计收入和账户余额中
+   * 过期的分享权益会进入 S0000000001，所以余额和收入都需要包含过期收益
    */
   private assembleFixedAccounts(
     fixedAccounts: AllSystemAccountsResponse['fixedAccounts'],
@@ -319,14 +320,20 @@ export class SystemAccountReportApplicationService {
     for (const account of fixedAccounts) {
       const fieldName = FIXED_ACCOUNT_TYPES[account.accountType];
       if (fieldName && fieldName in result) {
-        // 如果是总部储蓄账户 (HQ_COMMUNITY)，累加过期收益
+        // 如果是总部储蓄账户 (HQ_COMMUNITY)，累加过期收益到余额和累计收入
         if (account.accountType === 'HQ_COMMUNITY' && expiredRewardsTotal > 0) {
+          const currentBalance = parseFloat(account.usdtBalance) || 0;
           const currentReceived = parseFloat(account.totalReceived) || 0;
+          const newBalance = currentBalance + expiredRewardsTotal;
           const newTotalReceived = currentReceived + expiredRewardsTotal;
           (result as any)[fieldName] = {
             ...account,
+            usdtBalance: newBalance.toFixed(8),
             totalReceived: newTotalReceived.toFixed(8),
           };
+          this.logger.log(
+            `[assembleFixedAccounts] HQ_COMMUNITY 余额: ${currentBalance} + 过期收益 ${expiredRewardsTotal} = ${newBalance}`,
+          );
           this.logger.log(
             `[assembleFixedAccounts] HQ_COMMUNITY 累计收入: ${currentReceived} + 过期收益 ${expiredRewardsTotal} = ${newTotalReceived}`,
           );