feat: 为所有数值显示添加千分位分隔符

- 重构 formatNumber 和 formatUSDC 函数，默认添加千分位分隔符
- 更新 Statistics.tsx、CopyTradingStatistics.tsx 等统计页面
- 更新 PositionList.tsx 持仓列表的数值显示
- 更新 AccountList.tsx 账户列表的余额显示
- 所有数值（金额、数量、价格等）现在默认显示千分位
- 示例：1234567.89 显示为 1,234,567.89

影响范围：
- 工具函数：utils/index.ts
- 统计页面：Statistics.tsx, CopyTradingStatistics.tsx
- 业务页面：PositionList.tsx, AccountList.tsx

Changes:
- Refactored formatNumber and formatUSDC to include thousand separators by default
- Updated statistics pages to display numbers with commas
- Updated position list and account list for better readability
- Example: 1234567.89 now displays as 1,234,567.89

frontend/src/pages/AccountList.tsx

@@ -724,47 +724,47 @@ const AccountList: React.FC = () => {
             {(detailAccount.totalOrders !== undefined || detailAccount.totalPnl !== undefined ||
               detailAccount.activeOrders !== undefined ||
               detailAccount.completedOrders !== undefined || detailAccount.positionCount !== undefined) && (
-              <>
-                <Divider />
-                <Descriptions
-                  column={isMobile ? 1 : 2}
-                  bordered
-                  size={isMobile ? 'small' : 'middle'}
-                  title={t('accountList.statistics')}
-                >
-                  {detailAccount.totalOrders !== undefined && (
-                    <Descriptions.Item label={t('accountList.totalOrders')}>
-                      {detailAccount.totalOrders}
-                    </Descriptions.Item>
-                  )}
-                  {detailAccount.activeOrders !== undefined && (
-                    <Descriptions.Item label={t('accountList.activeOrdersCount')}>
-                      <Tag color={detailAccount.activeOrders > 0 ? 'orange' : 'default'}>{detailAccount.activeOrders}</Tag>
-                    </Descriptions.Item>
-                  )}
-                  {detailAccount.completedOrders !== undefined && (
-                    <Descriptions.Item label={t('accountList.completedOrders')}>
-                      <Tag color="success">{detailAccount.completedOrders}</Tag>
-                    </Descriptions.Item>
-                  )}
-                  {detailAccount.positionCount !== undefined && (
-                    <Descriptions.Item label={t('accountList.positionCount')}>
-                      <Tag color={detailAccount.positionCount > 0 ? 'blue' : 'default'}>{detailAccount.positionCount}</Tag>
-                    </Descriptions.Item>
-                  )}
-                  {detailAccount.totalPnl !== undefined && (
-                    <Descriptions.Item label={t('accountList.totalPnl')}>
-                      <span style={{ 
-                        fontWeight: 'bold',
-                        color: detailAccount.totalPnl && detailAccount.totalPnl.startsWith('-') ? '#ff4d4f' : '#52c41a'
-                      }}>
-                        {formatUSDC(detailAccount.totalPnl)} USDC
-                      </span>
-                    </Descriptions.Item>
-                  )}
-                </Descriptions>
-              </>
-            )}
+                <>
+                  <Divider />
+                  <Descriptions
+                    column={isMobile ? 1 : 2}
+                    bordered
+                    size={isMobile ? 'small' : 'middle'}
+                    title={t('accountList.statistics')}
+                  >
+                    {detailAccount.totalOrders !== undefined && (
+                      <Descriptions.Item label={t('accountList.totalOrders')}>
+                        {detailAccount.totalOrders}
+                      </Descriptions.Item>
+                    )}
+                    {detailAccount.activeOrders !== undefined && (
+                      <Descriptions.Item label={t('accountList.activeOrdersCount')}>
+                        <Tag color={detailAccount.activeOrders > 0 ? 'orange' : 'default'}>{detailAccount.activeOrders}</Tag>
+                      </Descriptions.Item>
+                    )}
+                    {detailAccount.completedOrders !== undefined && (
+                      <Descriptions.Item label={t('accountList.completedOrders')}>
+                        <Tag color="success">{detailAccount.completedOrders}</Tag>
+                      </Descriptions.Item>
+                    )}
+                    {detailAccount.positionCount !== undefined && (
+                      <Descriptions.Item label={t('accountList.positionCount')}>
+                        <Tag color={detailAccount.positionCount > 0 ? 'blue' : 'default'}>{detailAccount.positionCount}</Tag>
+                      </Descriptions.Item>
+                    )}
+                    {detailAccount.totalPnl !== undefined && (
+                      <Descriptions.Item label={t('accountList.totalPnl')}>
+                        <span style={{
+                          fontWeight: 'bold',
+                          color: detailAccount.totalPnl && detailAccount.totalPnl.startsWith('-') ? '#ff4d4f' : '#52c41a'
+                        }}>
+                          {formatUSDC(detailAccount.totalPnl)} USDC
+                        </span>
+                      </Descriptions.Item>
+                    )}
+                  </Descriptions>
+                </>
+              )}
           </div>
         ) : (
           <div style={{ textAlign: 'center', padding: '20px' }}>

frontend/src/pages/CopyTradingStatistics.tsx

@@ -3,7 +3,7 @@ import { useParams, useNavigate } from 'react-router-dom'
 import { Card, Row, Col, Statistic, Tag, Button, message, Spin } from 'antd'
 import { ArrowUpOutlined, ArrowDownOutlined, LeftOutlined } from '@ant-design/icons'
 import { apiService } from '../services/api'
-import { formatUSDC } from '../utils'
+import { formatUSDC, formatNumber } from '../utils'
 import { useMediaQuery } from 'react-responsive'
 import type { CopyTradingStatistics } from '../types'
 
@@ -137,7 +137,7 @@ const CopyTradingStatisticsPage: React.FC = () => {
           <Col xs={24} sm={12} md={6}>
             <Statistic
               title="总买入数量"
-              value={formatUSDC(statistics.totalBuyQuantity)}
+              value={formatNumber(statistics.totalBuyQuantity, 4)}
               suffix=""
             />
           </Col>
@@ -151,14 +151,14 @@ const CopyTradingStatisticsPage: React.FC = () => {
           <Col xs={24} sm={12} md={6}>
             <Statistic
               title="总买入订单数"
-              value={statistics.totalBuyOrders}
+              value={formatNumber(statistics.totalBuyOrders)}
               suffix="笔"
             />
           </Col>
           <Col xs={24} sm={12} md={6}>
             <Statistic
               title="平均买入价格"
-              value={formatUSDC(statistics.avgBuyPrice)}
+              value={formatNumber(statistics.avgBuyPrice, 4)}
               suffix=""
             />
           </Col>
@@ -171,7 +171,7 @@ const CopyTradingStatisticsPage: React.FC = () => {
           <Col xs={24} sm={12} md={8}>
             <Statistic
               title="总卖出数量"
-              value={formatUSDC(statistics.totalSellQuantity)}
+              value={formatNumber(statistics.totalSellQuantity, 4)}
               suffix=""
             />
           </Col>
@@ -185,7 +185,7 @@ const CopyTradingStatisticsPage: React.FC = () => {
           <Col xs={24} sm={12} md={8}>
             <Statistic
               title="总卖出订单数"
-              value={statistics.totalSellOrders}
+              value={formatNumber(statistics.totalSellOrders)}
               suffix="笔"
             />
           </Col>
@@ -198,14 +198,14 @@ const CopyTradingStatisticsPage: React.FC = () => {
           <Col xs={24} sm={12} md={12}>
             <Statistic
               title="当前持仓数量"
-              value={formatUSDC(statistics.currentPositionQuantity)}
+              value={formatNumber(statistics.currentPositionQuantity, 4)}
               suffix=""
             />
           </Col>
           <Col xs={24} sm={12} md={12}>
             <Statistic
               title="平均买入价格"
-              value={formatUSDC(statistics.avgBuyPrice)}
+              value={formatNumber(statistics.avgBuyPrice, 4)}
               suffix=""
             />
           </Col>

frontend/src/pages/PositionList.tsx

@@ -8,7 +8,7 @@ import { getPositionKey } from '../types'
 import { useMediaQuery } from 'react-responsive'
 import { useWebSocketSubscription } from '../hooks/useWebSocket'
 import { wsManager } from '../services/websocket'
-import { formatUSDC } from '../utils'
+import { formatUSDC, formatNumber as formatNumberUtil } from '../utils'
 
 type PositionFilter = 'current' | 'historical'
 type ViewMode = 'card' | 'list'
@@ -328,7 +328,7 @@ const PositionList: React.FC = () => {
     if (!value) return '-'
     const num = parseFloat(value)
     if (isNaN(num)) return value
-    return num.toFixed(decimals)
+    return formatNumberUtil(value, decimals)
   }
 
   const formatPercent = (value: string | undefined) => {
@@ -823,132 +823,132 @@ const PositionList: React.FC = () => {
   // 根据仓位类型动态生成列（历史仓位不显示当前价格、当前价值、状态列）
   const columns = useMemo(() => {
     const baseColumns: any[] = [
-    {
-      title: '',
-      key: 'icon',
-      width: 50,
-      render: (_: any, record: AccountPosition) => {
-        if (!record.marketIcon) return null
-        return (
-          <img 
-            src={record.marketIcon} 
-            alt={record.marketTitle || 'Market'}
-            style={{ 
-              width: '32px', 
-              height: '32px', 
-              borderRadius: '4px',
-              objectFit: 'cover'
-            }}
-            onError={(e) => {
-              // 图片加载失败时隐藏
-              e.currentTarget.style.display = 'none'
-            }}
-          />
-        )
+      {
+        title: '',
+        key: 'icon',
+        width: 50,
+        render: (_: any, record: AccountPosition) => {
+          if (!record.marketIcon) return null
+          return (
+            <img
+              src={record.marketIcon}
+              alt={record.marketTitle || 'Market'}
+              style={{
+                width: '32px',
+                height: '32px',
+                borderRadius: '4px',
+                objectFit: 'cover'
+              }}
+              onError={(e) => {
+                // 图片加载失败时隐藏
+                e.currentTarget.style.display = 'none'
+              }}
+            />
+          )
+        },
+        fixed: isMobile ? ('left' as const) : undefined
       },
-      fixed: isMobile ? ('left' as const) : undefined
-    },
-    {
-      title: '账户',
-      dataIndex: 'accountName',
-      key: 'accountName',
-      render: (text: string | undefined, record: AccountPosition) => (
-        <div>
-          <div style={{ fontWeight: 'bold' }}>
-            {text || `账户 ${record.accountId}`}
-          </div>
-          <div style={{ fontSize: '12px', color: '#999', fontFamily: 'monospace' }}>
-            {record.walletAddress.slice(0, 6)}...{record.walletAddress.slice(-6)}
-          </div>
-        </div>
-      ),
-      fixed: isMobile ? ('left' as const) : undefined,
-      width: isMobile ? 150 : 200
-    },
-    {
-      title: '市场',
-      dataIndex: 'marketTitle',
-      key: 'marketTitle',
-      render: (text: string | undefined, record: AccountPosition) => {
-        const url = record.eventSlug || record.marketSlug
-          ? `https://polymarket.com/event/${record.eventSlug || record.marketSlug}`
-          : null
-        
-        const handleTitleClick = (e: React.MouseEvent) => {
-          e.stopPropagation()
-          if (url) {
-            window.open(url, '_blank', 'noopener,noreferrer')
-          }
-        }
-        
-        return (
+      {
+        title: '账户',
+        dataIndex: 'accountName',
+        key: 'accountName',
+        render: (text: string | undefined, record: AccountPosition) => (
           <div>
-            {text ? (
-              <div>
-                {url ? (
-                  <a 
-                    href={url}
-                    target="_blank"
-                    rel="noopener noreferrer"
-                    onClick={handleTitleClick}
-                    style={{ fontWeight: 'bold', color: '#1890ff', textDecoration: 'none', cursor: 'pointer' }}
-                  >
-                    {text}
-                  </a>
-                ) : (
-                  <div style={{ fontWeight: 'bold' }}>{text}</div>
-                )}
-              </div>
-            ) : (
-              <div style={{ fontFamily: 'monospace', fontSize: '12px' }}>
-                {record.marketId.slice(0, 10)}...
-              </div>
-            )}
-            {record.marketSlug && (
-              <div style={{ fontSize: '12px', color: '#999' }}>{record.marketSlug}</div>
-            )}
+            <div style={{ fontWeight: 'bold' }}>
+              {text || `账户 ${record.accountId}`}
+            </div>
+            <div style={{ fontSize: '12px', color: '#999', fontFamily: 'monospace' }}>
+              {record.walletAddress.slice(0, 6)}...{record.walletAddress.slice(-6)}
+            </div>
           </div>
-        )
+        ),
+        fixed: isMobile ? ('left' as const) : undefined,
+        width: isMobile ? 150 : 200
+      },
+      {
+        title: '市场',
+        dataIndex: 'marketTitle',
+        key: 'marketTitle',
+        render: (text: string | undefined, record: AccountPosition) => {
+          const url = record.eventSlug || record.marketSlug
+            ? `https://polymarket.com/event/${record.eventSlug || record.marketSlug}`
+            : null
+
+          const handleTitleClick = (e: React.MouseEvent) => {
+            e.stopPropagation()
+            if (url) {
+              window.open(url, '_blank', 'noopener,noreferrer')
+            }
+          }
+
+          return (
+            <div>
+              {text ? (
+                <div>
+                  {url ? (
+                    <a
+                      href={url}
+                      target="_blank"
+                      rel="noopener noreferrer"
+                      onClick={handleTitleClick}
+                      style={{ fontWeight: 'bold', color: '#1890ff', textDecoration: 'none', cursor: 'pointer' }}
+                    >
+                      {text}
+                    </a>
+                  ) : (
+                    <div style={{ fontWeight: 'bold' }}>{text}</div>
+                  )}
+                </div>
+              ) : (
+                <div style={{ fontFamily: 'monospace', fontSize: '12px' }}>
+                  {record.marketId.slice(0, 10)}...
+                </div>
+              )}
+              {record.marketSlug && (
+                <div style={{ fontSize: '12px', color: '#999' }}>{record.marketSlug}</div>
+              )}
+            </div>
+          )
+        },
+        width: isMobile ? 200 : 250
+      },
+      {
+        title: '方向',
+        dataIndex: 'side',
+        key: 'side',
+        render: (side: string) => (
+          <Tag color={getSideColor(side)}>{side}</Tag>
+        ),
+        width: 80
+      },
+      {
+        title: '数量',
+        dataIndex: 'quantity',
+        key: 'quantity',
+        render: (quantity: string) => formatNumber(quantity, 4),
+        align: 'right' as const,
+        width: 100
+      },
+      {
+        title: '平均价格',
+        dataIndex: 'avgPrice',
+        key: 'avgPrice',
+        render: (price: string) => formatNumber(price, 4),
+        align: 'right' as const,
+        width: 120
+      },
+      {
+        title: '开仓价值',
+        dataIndex: 'initialValue',
+        key: 'initialValue',
+        render: (value: string) => (
+          <span>
+            {formatUSDC(value)} USDC
+          </span>
+        ),
+        align: 'right' as const,
+        width: 120
       },
-      width: isMobile ? 200 : 250
-    },
-    {
-      title: '方向',
-      dataIndex: 'side',
-      key: 'side',
-      render: (side: string) => (
-        <Tag color={getSideColor(side)}>{side}</Tag>
-      ),
-      width: 80
-    },
-    {
-      title: '数量',
-      dataIndex: 'quantity',
-      key: 'quantity',
-      render: (quantity: string) => formatNumber(quantity, 4),
-      align: 'right' as const,
-      width: 100
-    },
-    {
-      title: '平均价格',
-      dataIndex: 'avgPrice',
-      key: 'avgPrice',
-      render: (price: string) => formatNumber(price, 4),
-      align: 'right' as const,
-      width: 120
-    },
-    {
-      title: '开仓价值',
-      dataIndex: 'initialValue',
-      key: 'initialValue',
-      render: (value: string) => (
-        <span>
-          {formatUSDC(value)} USDC
-        </span>
-      ),
-      align: 'right' as const,
-      width: 120
-    },
     ]
 
     // 只有当前仓位才显示当前价格和当前价值列
@@ -985,70 +985,70 @@ const PositionList: React.FC = () => {
 
     // 只有当前仓位才显示盈亏和已实现盈亏列
     if (positionFilter === 'current') {
-    baseColumns.push(
-      {
-        title: '盈亏',
-        dataIndex: 'pnl',
-        key: 'pnl',
-        render: (pnl: string, record: AccountPosition) => {
-          const pnlNum = parseFloat(pnl || '0')
-          const percentPnl = parseFloat(record.percentPnl || '0')
-          return (
-            <div>
-              <div style={{ 
-                color: pnlNum >= 0 ? '#3f8600' : '#cf1322',
-                fontWeight: 'bold'
-              }}>
-                {pnlNum >= 0 ? '+' : ''}{formatUSDC(pnl)} USDC
-              </div>
-              <div style={{ 
-                fontSize: '12px',
-                color: percentPnl >= 0 ? '#3f8600' : '#cf1322'
-              }}>
-                {formatPercent(record.percentPnl)}
-              </div>
-            </div>
-          )
-        },
-        align: 'right' as const,
-        width: 150,
-        sorter: (a: AccountPosition, b: AccountPosition) => {
-          const pnlA = parseFloat(a.pnl || '0')
-          const pnlB = parseFloat(b.pnl || '0')
-          return pnlA - pnlB
-        }
-      },
-      {
-        title: '已实现盈亏',
-        dataIndex: 'realizedPnl',
-        key: 'realizedPnl',
-        render: (realizedPnl: string | undefined, record: AccountPosition) => {
-          if (!realizedPnl) return '-'
-          const pnlNum = parseFloat(realizedPnl)
-          const percentPnl = parseFloat(record.percentRealizedPnl || '0')
-          return (
-            <div>
-              <div style={{ 
-                color: pnlNum >= 0 ? '#3f8600' : '#cf1322',
-                fontWeight: 'bold'
-              }}>
-                {pnlNum >= 0 ? '+' : ''}{formatUSDC(realizedPnl)} USDC
-              </div>
-              {record.percentRealizedPnl && (
+      baseColumns.push(
+        {
+          title: '盈亏',
+          dataIndex: 'pnl',
+          key: 'pnl',
+          render: (pnl: string, record: AccountPosition) => {
+            const pnlNum = parseFloat(pnl || '0')
+            const percentPnl = parseFloat(record.percentPnl || '0')
+            return (
+              <div>
+                <div style={{
+                  color: pnlNum >= 0 ? '#3f8600' : '#cf1322',
+                  fontWeight: 'bold'
+                }}>
+                  {pnlNum >= 0 ? '+' : ''}{formatUSDC(pnl)} USDC
+                </div>
                 <div style={{
                   fontSize: '12px',
                   color: percentPnl >= 0 ? '#3f8600' : '#cf1322'
                 }}>
-                  {formatPercent(record.percentRealizedPnl)}
+                  {formatPercent(record.percentPnl)}
                 </div>
-              )}
-            </div>
-          )
+              </div>
+            )
+          },
+          align: 'right' as const,
+          width: 150,
+          sorter: (a: AccountPosition, b: AccountPosition) => {
+            const pnlA = parseFloat(a.pnl || '0')
+            const pnlB = parseFloat(b.pnl || '0')
+            return pnlA - pnlB
+          }
         },
-        align: 'right' as const,
-        width: 150
-      }
-    )
+        {
+          title: '已实现盈亏',
+          dataIndex: 'realizedPnl',
+          key: 'realizedPnl',
+          render: (realizedPnl: string | undefined, record: AccountPosition) => {
+            if (!realizedPnl) return '-'
+            const pnlNum = parseFloat(realizedPnl)
+            const percentPnl = parseFloat(record.percentRealizedPnl || '0')
+            return (
+              <div>
+                <div style={{
+                  color: pnlNum >= 0 ? '#3f8600' : '#cf1322',
+                  fontWeight: 'bold'
+                }}>
+                  {pnlNum >= 0 ? '+' : ''}{formatUSDC(realizedPnl)} USDC
+                </div>
+                {record.percentRealizedPnl && (
+                  <div style={{
+                    fontSize: '12px',
+                    color: percentPnl >= 0 ? '#3f8600' : '#cf1322'
+                  }}>
+                    {formatPercent(record.percentRealizedPnl)}
+                  </div>
+                )}
+              </div>
+            )
+          },
+          align: 'right' as const,
+          width: 150
+        }
+      )
     }
 
     // 只有当前仓位才显示操作列
@@ -1097,7 +1097,7 @@ const PositionList: React.FC = () => {
       <div style={{ marginBottom: '16px' }}>
         <div style={{ display: 'flex', justifyContent: 'space-between', alignItems: 'center', flexWrap: 'wrap', gap: '12px', marginBottom: '12px' }}>
           <div style={{ display: 'flex', alignItems: 'center', gap: '12px' }}>
-          <h2 style={{ margin: 0 }}>仓位管理</h2>
+            <h2 style={{ margin: 0 }}>仓位管理</h2>
             {/* WebSocket 连接状态指示器 */}
             <Tag
               color={wsConnected ? 'green' : 'orange'}
@@ -1163,9 +1163,9 @@ const PositionList: React.FC = () => {
                   return nameA.localeCompare(nameB, 'zh-CN')
                 })
                 .map(account => ({
-                value: account.id,
-                label: account.accountName || `账户 ${account.id}`
-              }))
+                  value: account.id,
+                  label: account.accountName || `账户 ${account.id}`
+                }))
             ]}
           />
           <div style={{ display: 'flex', alignItems: 'center', gap: '12px', flexWrap: 'wrap' }}>
@@ -1176,10 +1176,10 @@ const PositionList: React.FC = () => {
               display: 'inline-flex',
               gap: '4px'
             }}>
-            <Radio.Group 
-              value={positionFilter} 
-              onChange={(e) => setPositionFilter(e.target.value)}
-              size={isMobile ? 'small' : 'middle'}
+              <Radio.Group
+                value={positionFilter}
+                onChange={(e) => setPositionFilter(e.target.value)}
+                size={isMobile ? 'small' : 'middle'}
                 style={{ display: 'flex', gap: '4px' }}
               >
                 <Radio.Button
@@ -1215,7 +1215,7 @@ const PositionList: React.FC = () => {
                       {currentCount}
                     </Tag>
                   </span>
-              </Radio.Button>
+                </Radio.Button>
                 <Radio.Button
                   value="historical"
                   style={{
@@ -1249,8 +1249,8 @@ const PositionList: React.FC = () => {
                       {historicalCount}
                     </Tag>
                   </span>
-              </Radio.Button>
-            </Radio.Group>
+                </Radio.Button>
+              </Radio.Group>
             </div>
             {redeemableSummary && redeemableSummary.totalCount > 0 && (
               <Button

frontend/src/pages/Statistics.tsx

@@ -5,7 +5,7 @@ import { useTranslation } from 'react-i18next'
 import type { Dayjs } from 'dayjs'
 import { apiService } from '../services/api'
 import type { Statistics as StatisticsType } from '../types'
-import { formatUSDC } from '../utils'
+import { formatUSDC, formatNumber } from '../utils'
 import { useMediaQuery } from 'react-responsive'
 
 const { RangePicker } = DatePicker
@@ -91,7 +91,7 @@ const Statistics: React.FC = () => {
           <Card>
             <Statistic
               title={t('statistics.totalOrders') || '总订单数'}
-              value={stats?.totalOrders || 0}
+              value={formatNumber(stats?.totalOrders || 0)}
               loading={loading}
             />
           </Card>

frontend/src/utils/index.ts

@@ -1,12 +1,14 @@
 /**
- * 格式化数字，自动去除尾随零
+ * 格式化数字，添加千分位分隔符，自动去除尾随零
  * @param value - 数字值（字符串或数字）
  * @param maxDecimals - 最大小数位数（默认不限制）
- * @returns 格式化后的字符串，如果值为空或无效则返回 ''
+ * @returns 格式化后的字符串，如 "123,456.78"，如果值为空或无效则返回 ''
  * @example
+ * formatNumber(1234567.89) => "1,234,567.89"
+ * formatNumber(1234567.00) => "1,234,567"
+ * formatNumber(1234.5678, 2) => "1,234.56"
  * formatNumber(100.00) => "100"
  * formatNumber(100.50) => "100.5"
- * formatNumber(100.55) => "100.55"
  */
 export const formatNumber = (value: string | number | undefined | null, maxDecimals?: number): string => {
   if (value === undefined || value === null || value === '') {
@@ -18,26 +20,38 @@ export const formatNumber = (value: string | number | undefined | null, maxDecim
     return ''
   }
 
-  // 如果有最大小数位数限制，先截断
+  // 处理小数位数
+  let numStr: string
   if (maxDecimals !== undefined) {
     const multiplier = Math.pow(10, maxDecimals)
     const truncated = Math.floor(num * multiplier) / multiplier
-    return truncated.toFixed(maxDecimals).replace(/\.?0+$/, '')
+    numStr = truncated.toFixed(maxDecimals).replace(/\.?0+$/, '')
+  } else {
+    numStr = num.toString().replace(/\.?0+$/, '')
   }
 
-  // 直接转换为字符串，然后去除尾随零
-  return num.toString().replace(/\.?0+$/, '')
+  // 分离整数和小数部分
+  const parts = numStr.split('.')
+  const integerPart = parts[0]
+  const decimalPart = parts[1]
+
+  // 为整数部分添加千分位分隔符
+  const formattedInteger = integerPart.replace(/\B(?=(\d{3})+(?!\d))/g, ',')
+
+  // 组合结果
+  return decimalPart ? `${formattedInteger}.${decimalPart}` : formattedInteger
 }
 
 /**
- * 格式化 USDC 金额
+ * 格式化 USDC 金额，带千分位分隔符
  * 最多显示 4 位小数，自动去除尾随零（截断，不四舍五入）
  * @param value - 金额值（字符串或数字）
- * @returns 格式化后的字符串，如果值为空或无效则返回 '-'
+ * @returns 格式化后的字符串，如 "1,234.56"，如果值为空或无效则返回 '-'
  * @example
+ * formatUSDC(1234.56) => "1,234.56"
+ * formatUSDC(1234567.8901) => "1,234,567.8901"
+ * formatUSDC(1234.00) => "1,234"
  * formatUSDC(1.23) => "1.23"
- * formatUSDC(1.23456) => "1.2345"
- * formatUSDC(1.2) => "1.2"
  * formatUSDC(1) => "1"
  */
 export const formatUSDC = (value: string | number | undefined | null): string => {
@@ -50,12 +64,7 @@ export const formatUSDC = (value: string | number | undefined | null): string =>
     return '-'
   }
 
-  // 使用 Math.floor 截断到4位小数（不四舍五入）
-  const multiplier = Math.pow(10, 4)
-  const truncated = Math.floor(num * multiplier) / multiplier
-  
-  // 使用 toFixed(4) 确保格式一致，然后去除尾随零和小数点
-  return truncated.toFixed(4).replace(/\.?0+$/, '')
+  return formatNumber(num, 4)
 }
 
 // 统一导出 ethers 相关工具函数
@@ -97,7 +106,7 @@ export const isAutoGeneratedOrderId = (orderId: string | undefined | null): bool
 /**
  * 构建 Polymarket 市场 URL
  * 对于 moneyline 市场，跳转到 moneyline 页面
- * 注意：目前无法自动判断市场是否为 moneyline，需要后端提供标识
+ * 注意：目前无法自动判断市场是否为 moneyline,需要后端提供标识
  * @param marketSlug - 市场 slug（用于显示）
  * @param eventSlug - 跳转用的 slug（从 events[0].slug 获取，优先使用）
  * @param marketCategory - 市场分类（sports, crypto 等）