feat: Leader列表显示仓位资产

- 列表新增仓位资产列
- 移动端卡片新增仓位资产Tag
- 文案'仓位余额'改为'仓位资产'
- 仓位资产使用紫色Tag显示

frontend/src/locales/en/common.json

@@ -502,7 +502,7 @@
     "balanceInfo": "Balance Information",
     "refresh": "Refresh",
     "availableBalance": "Available Balance",
-    "positionBalance": "Position Balance",
+    "positionBalance": "Position Asset",
     "totalBalance": "Total Balance",
     "positions": "Positions",
     "noPositions": "No positions",

frontend/src/locales/zh-CN/common.json

@@ -502,7 +502,7 @@
     "balanceInfo": "余额信息",
     "refresh": "刷新",
     "availableBalance": "可用余额",
-    "positionBalance": "仓位余额",
+    "positionBalance": "仓位资产",
     "totalBalance": "总余额",
     "positions": "持仓列表",
     "noPositions": "暂无持仓",

frontend/src/locales/zh-TW/common.json

@@ -502,7 +502,7 @@
     "balanceInfo": "餘額信息",
     "refresh": "刷新",
     "availableBalance": "可用餘額",
-    "positionBalance": "倉位餘額",
+    "positionBalance": "倉位資產",
     "totalBalance": "總餘額",
     "positions": "持倉列表",
     "noPositions": "暫無持倉",

frontend/src/pages/LeaderList.tsx

@@ -247,6 +247,28 @@ const LeaderList: React.FC = () => {
         return <Text ellipsis={{ tooltip: remark }} style={{ maxWidth: 180 }}>{remark}</Text>
       }
     },
+    {
+      title: t('leaderDetail.positionBalance'),
+      key: 'positionAsset',
+      width: 150,
+      render: (_: any, record: Leader) => {
+        const balance = balanceMap[record.id]
+        if (!balance) return <Spin size="small" />
+        const displayText = balance.position === '-' ? '-' : `${formatUSDC(balance.position)} USDC`
+        return <Text style={{ color: '#722ed1', fontSize: '14px' }}>{displayText}</Text>
+      }
+    },
+    {
+      title: t('leaderDetail.positionBalance'),
+      key: 'positionAsset',
+      width: 150,
+      render: (_: any, record: Leader) => {
+        const balance = balanceMap[record.id]
+        if (!balance) return <Spin size="small" />
+        const displayText = balance.position === '-' ? '-' : `${formatUSDC(balance.position)} USDC`
+        return <Text style={{ color: '#722ed1', fontSize: '14px' }}>{displayText}</Text>
+      }
+    },
     {
       title: t('leaderDetail.totalBalance'),
       key: 'balance',
@@ -349,6 +371,9 @@ const LeaderList: React.FC = () => {
 
                       <div style={{ display: 'flex', gap: '8px', marginBottom: '12px', flexWrap: 'wrap' }}>
                         <Tag color="cyan">{leader.copyTradingCount} {t('leaderList.copyTradingCount')}</Tag>
+                        {balance && balance.position !== '-' && balance.position !== '0' && (
+                          <Tag color="purple">{t('leaderDetail.positionBalance')}: {formatUSDC(balance.position)}</Tag>
+                        )}
                       </div>
 
                       {leader.remark && (