fix(admin-web): 修复划转记录页面报错问题

- 适配后端返回格式：orders -> items, pageSize -> limit
- 解决 Cannot read properties of undefined (reading 'length') 错误

🤖 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

@@ -34,7 +34,16 @@ export const systemWithdrawalService = {
     const response = await apiClient.get(API_ENDPOINTS.SYSTEM_WITHDRAWAL.ORDERS, { params });
     // eslint-disable-next-line @typescript-eslint/no-explicit-any
     const result = (response as any)?.data?.data;
-    return result ?? { items: [], total: 0, page: 1, limit: 20 };
+    // [2026-01-07] 适配后端返回格式：orders -> items, pageSize -> limit
+    if (result) {
+      return {
+        items: result.orders ?? [],
+        total: result.total ?? 0,
+        page: result.page ?? 1,
+        limit: result.pageSize ?? 20,
+      };
+    }
+    return { items: [], total: 0, page: 1, limit: 20 };
   },
 
   /**