fix(admin-web): 修复系统账户余额统计不一致问题

- 账户余额改为 usdtAvailable + settleableUsdt，与累计收入统计保持一致
- 解决社区权益进入 settleableUsdt 导致的余额与累计收入不匹配问题

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

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

frontend/admin-web/src/services/systemWithdrawalService.ts

@@ -1,6 +1,7 @@
 /**
  * 系统账户划转服务
  * [2026-01-06] 新增
+ * [2026-01-07] 更新：账户余额从 reporting-service 获取，与数据统计页面保持一致
  */
 
 import apiClient from '@/infrastructure/api/client';
@@ -19,14 +20,62 @@ import type {
 export const systemWithdrawalService = {
   /**
    * 获取可划转的系统账户列表
-   * [2026-01-07] 修复：apiClient 响应拦截器返回 response.data，即 { success, data }
-   * 所以实际数据在 response.data.data
+   * [2026-01-07] 更新：从 reporting-service 的系统账户报表接口获取数据
+   * 这样账户余额的计算方式与数据统计页面完全一致
+   * 公式：账户余额 = (累计收入 + 过期收益) - 累计转出
    */
   async getAccounts(): Promise<SystemAccount[]> {
-    const response = await apiClient.get(API_ENDPOINTS.SYSTEM_WITHDRAWAL.ACCOUNTS);
+    // 从 reporting-service 获取系统账户报表数据
+    const response = await apiClient.get(API_ENDPOINTS.SYSTEM_ACCOUNT_REPORTS.FULL_REPORT);
     // eslint-disable-next-line @typescript-eslint/no-explicit-any
-    const result = (response as any)?.data?.data;
-    return result ?? [];
+    const reportData = (response as any)?.data;
+
+    if (!reportData) {
+      return [];
+    }
+
+    const accounts: SystemAccount[] = [];
+
+    // 处理固定系统账户
+    const fixedAccounts = reportData.fixedAccounts;
+    if (fixedAccounts) {
+      // 按照指定顺序添加固定账户
+      const orderedKeys = ['costAccount', 'operationAccount', 'hqCommunity', 'rwadPoolPending', 'platformFee'];
+      for (const key of orderedKeys) {
+        const account = fixedAccounts[key];
+        if (account) {
+          accounts.push({
+            accountSequence: account.accountSequence,
+            accountName: account.accountType || key,
+            balance: account.usdtBalance || '0',
+          });
+        }
+      }
+    }
+
+    // 处理省区域账户
+    if (reportData.provinceSummary?.accounts) {
+      for (const account of reportData.provinceSummary.accounts) {
+        accounts.push({
+          accountSequence: account.accountSequence,
+          accountName: account.regionName || `省区域(${account.regionCode})`,
+          balance: account.usdtBalance || '0',
+        });
+      }
+    }
+
+    // 处理市区域账户
+    if (reportData.citySummary?.accounts) {
+      for (const account of reportData.citySummary.accounts) {
+        accounts.push({
+          accountSequence: account.accountSequence,
+          accountName: account.regionName || `市区域(${account.regionCode})`,
+          balance: account.usdtBalance || '0',
+        });
+      }
+    }
+
+    return accounts;
   },
 
   /**