fix(mining-admin): fix wallet ledger API to match frontend expected format

- Return usdtAvailable, usdtFrozen, pendingUsdt, settleableUsdt,
  settledTotalUsdt, expiredTotalUsdt instead of old field names
- Query SyncedUserWallet table for GREEN_POINTS wallet data
- Use miningAccount.availableBalance for pendingUsdt

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

backend/services/mining-admin-service/src/application/services/users.service.ts

@@ -906,7 +906,7 @@ export class UsersService {
 
   /**
    * 获取用户钱包流水
-   * TODO: 从 mining-service 同步钱包流水数据
+   * 从 SyncedUserWallet 获取钱包汇总，从 SyncedMiningAccount 获取挖矿余额
    */
   async getWalletLedger(accountSequence: string, page: number, pageSize: number) {
     const user = await this.prisma.syncedUser.findUnique({
@@ -918,20 +918,44 @@ export class UsersService {
       throw new NotFoundException(`用户 ${accountSequence} 不存在`);
     }
 
+    // 获取用户的各类钱包数据
+    const wallets = await this.prisma.syncedUserWallet.findMany({
+      where: { accountSequence },
+    });
+
+    // 按钱包类型分类
+    const walletByType = new Map(wallets.map(w => [w.walletType, w]));
+    const greenPointsWallet = walletByType.get('GREEN_POINTS');
+    const contributionWallet = walletByType.get('CONTRIBUTION');
+    const tokenWallet = walletByType.get('TOKEN_STORAGE');
+
     const mining = user.miningAccount;
 
+    // 构建前端期望的钱包汇总格式
+    // usdtAvailable = GREEN_POINTS 钱包的可用余额 (绿积分)
+    // usdtFrozen = GREEN_POINTS 钱包的冻结余额
+    // pendingUsdt = 待领取收益（挖矿余额）
+    // settleableUsdt = 可结算收益
+    // settledTotalUsdt = 已结算收益
+    // expiredTotalUsdt = 过期收益
+    const summary = {
+      usdtAvailable: greenPointsWallet?.balance?.toString() || '0',
+      usdtFrozen: greenPointsWallet?.frozenBalance?.toString() || '0',
+      pendingUsdt: mining?.availableBalance?.toString() || '0',  // 挖矿可用余额作为待领取
+      settleableUsdt: '0',  // 暂无数据源
+      settledTotalUsdt: greenPointsWallet?.totalInflow?.toString() || '0',  // 总流入作为已结算
+      expiredTotalUsdt: '0',  // 暂无数据源
+    };
+
+    // TODO: 实现钱包流水分页查询
+    // 目前从 SyncedUserWallet 只能获取汇总数据，流水明细需要额外的表
     return {
-      summary: {
-        availableBalance: mining?.availableBalance?.toString() || '0',
-        frozenBalance: mining?.frozenBalance?.toString() || '0',
-        totalMined: mining?.totalMined?.toString() || '0',
-      },
+      summary,
       items: [],
       total: 0,
       page,
       pageSize,
       totalPages: 0,
-      note: '钱包流水数据需要从 mining-service 同步',
     };
   }